HDFS-4122. Cleanup HDFS logs and reduce the size of logged messages. Contributed by Suresh Srinivas.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1403120 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -152,6 +152,9 @@ Trunk (Unreleased)
 
     HDFS-4110. Refine a log printed in JNStorage. (Liang Xie via suresh)
 
+    HDFS-4122. Cleanup HDFS logs and reduce the size of logged messages.
+    (suresh)
+
   OPTIMIZATIONS
 
   BUG FIXES

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSClient.java

@@ -652,7 +652,7 @@ public class DFSClient implements java.io.Closeable {
       // if there is no more clients under the renewer.
       getLeaseRenewer().closeClient(this);
     } catch (IOException ioe) {
-       LOG.info("Exception occurred while aborting the client. " + ioe);
+       LOG.info("Exception occurred while aborting the client " + ioe);
     }
     closeConnectionToNamenode();
   }
@@ -2111,7 +2111,7 @@ public class DFSClient implements java.io.Closeable {
       reportBadBlocks(lblocks);
     } catch (IOException ie) {
       LOG.info("Found corruption while reading " + file
-          + ".  Error repairing corrupt blocks.  Bad blocks remain.", ie);
+          + ". Error repairing corrupt blocks. Bad blocks remain.", ie);
     }
   }
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java

@@ -457,7 +457,7 @@ public class DFSInputStream extends FSInputStream implements ByteBufferReadable
             buffersize, verifyChecksum, dfsClient.clientName);
         if(connectFailedOnce) {
           DFSClient.LOG.info("Successfully connected to " + targetAddr +
-                             " for block " + blk.getBlockId());
+                             " for " + blk);
         }
         return chosenNode;
       } catch (IOException ex) {
@@ -736,9 +736,9 @@ public class DFSInputStream extends FSInputStream implements ByteBufferReadable
         }
         
         if (nodes == null || nodes.length == 0) {
-          DFSClient.LOG.info("No node available for block: " + blockInfo);
+          DFSClient.LOG.info("No node available for " + blockInfo);
         }
-        DFSClient.LOG.info("Could not obtain block " + block.getBlock()
+        DFSClient.LOG.info("Could not obtain " + block.getBlock()
             + " from any node: " + ie
             + ". Will get new block locations from namenode and retry...");
         try {

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSOutputStream.java

@@ -735,7 +735,7 @@ public class DFSOutputStream extends FSOutputSummer implements Syncable {
     //
     private boolean processDatanodeError() throws IOException {
       if (response != null) {
-        DFSClient.LOG.info("Error Recovery for block " + block +
+        DFSClient.LOG.info("Error Recovery for " + block +
         " waiting for responder to exit. ");
         return true;
       }
@@ -1008,7 +1008,7 @@ public class DFSOutputStream extends FSOutputSummer implements Syncable {
         success = createBlockOutputStream(nodes, 0L, false);
 
         if (!success) {
-          DFSClient.LOG.info("Abandoning block " + block);
+          DFSClient.LOG.info("Abandoning " + block);
           dfsClient.namenode.abandonBlock(block, src, dfsClient.clientName);
           block = null;
           DFSClient.LOG.info("Excluding datanode " + nodes[errorIndex]);
@@ -1773,7 +1773,7 @@ public class DFSOutputStream extends FSOutputSummer implements Syncable {
         try {
           Thread.sleep(400);
           if (Time.now() - localstart > 5000) {
-            DFSClient.LOG.info("Could not complete file " + src + " retrying...");
+            DFSClient.LOG.info("Could not complete " + src + " retrying...");
           }
         } catch (InterruptedException ie) {
           DFSClient.LOG.warn("Caught exception ", ie);

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DistributedFileSystem.java

@@ -702,7 +702,7 @@ public class DistributedFileSystem extends FileSystem {
     }
     DatanodeInfo[] dataNode = {dfsIn.getCurrentDatanode()}; 
     lblocks[0] = new LocatedBlock(dataBlock, dataNode);
-    LOG.info("Found checksum error in data stream at block="
+    LOG.info("Found checksum error in data stream at "
         + dataBlock + " on datanode="
         + dataNode[0]);
 
@@ -715,7 +715,7 @@ public class DistributedFileSystem extends FileSystem {
     }
     DatanodeInfo[] sumsNode = {dfsSums.getCurrentDatanode()}; 
     lblocks[1] = new LocatedBlock(sumsBlock, sumsNode);
-    LOG.info("Found checksum error in checksum stream at block="
+    LOG.info("Found checksum error in checksum stream at "
         + sumsBlock + " on datanode=" + sumsNode[0]);
 
     // Ask client to delete blocks.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java

@@ -950,8 +950,8 @@ public class BlockManager {
       datanodes.append(node).append(" ");
     }
     if (datanodes.length() != 0) {
-      NameNode.stateChangeLog.info("BLOCK* addToInvalidates: "
-          + b + " to " + datanodes.toString());
+      NameNode.stateChangeLog.info("BLOCK* addToInvalidates: " + b + " "
+          + datanodes);
     }
   }
 
@@ -972,7 +972,7 @@ public class BlockManager {
       // thread of Datanode reports bad block before Block reports are sent
       // by the Datanode on startup
       NameNode.stateChangeLog.info("BLOCK* findAndMarkBlockAsCorrupt: "
-          + blk + " not found.");
+          + blk + " not found");
       return;
     }
     markBlockAsCorrupt(new BlockToMarkCorrupt(storedBlock, reason), dn);
@@ -1026,7 +1026,7 @@ public class BlockManager {
       NameNode.stateChangeLog.info("BLOCK* invalidateBlocks: postponing " +
           "invalidation of " + b + " on " + dn + " because " +
           nr.replicasOnStaleNodes() + " replica(s) are located on nodes " +
-          "with potentially out-of-date block reports.");
+          "with potentially out-of-date block reports");
       postponeBlock(b.corrupted);
 
     } else if (nr.liveReplicas() >= 1) {
@@ -1039,7 +1039,7 @@ public class BlockManager {
       }
     } else {
       NameNode.stateChangeLog.info("BLOCK* invalidateBlocks: " + b
-          + " on " + dn + " is the only copy and was not deleted.");
+          + " on " + dn + " is the only copy and was not deleted");
     }
   }
 
@@ -1160,9 +1160,8 @@ public class BlockManager {
                    (blockHasEnoughRacks(block)) ) {
                 neededReplications.remove(block, priority); // remove from neededReplications
                 neededReplications.decrementReplicationIndex(priority);
-                NameNode.stateChangeLog.info("BLOCK* "
-                    + "Removing block " + block
-                    + " from neededReplications as it has enough replicas.");
+                NameNode.stateChangeLog.info("BLOCK* Removing " + block
+                    + " from neededReplications as it has enough replicas");
                 continue;
               }
             }
@@ -1236,9 +1235,8 @@ public class BlockManager {
               neededReplications.remove(block, priority); // remove from neededReplications
               neededReplications.decrementReplicationIndex(priority);
               rw.targets = null;
-              NameNode.stateChangeLog.info("BLOCK* "
-                  + "Removing block " + block
-                  + " from neededReplications as it has enough replicas.");
+              NameNode.stateChangeLog.info("BLOCK* Removing " + block
+                  + " from neededReplications as it has enough replicas");
               continue;
             }
           }
@@ -1290,10 +1288,8 @@ public class BlockManager {
             targetList.append(' ');
             targetList.append(targets[k]);
           }
-          NameNode.stateChangeLog.info(
-                  "BLOCK* ask "
-                  + rw.srcNode + " to replicate "
-                  + rw.block + " to " + targetList);
+          NameNode.stateChangeLog.info("BLOCK* ask " + rw.srcNode
+              + " to replicate " + rw.block + " to " + targetList);
         }
       }
     }
@@ -1527,10 +1523,9 @@ public class BlockManager {
       boolean staleBefore = node.areBlockContentsStale();
       node.receivedBlockReport();
       if (staleBefore && !node.areBlockContentsStale()) {
-        LOG.info("BLOCK* processReport: " +
-            "Received first block report from " + node +
-            " after becoming active. Its block contents are no longer" +
-            " considered stale.");
+        LOG.info("BLOCK* processReport: Received first block report from "
+            + node + " after becoming active. Its block contents are no longer"
+            + " considered stale");
         rescanPostponedMisreplicatedBlocks();
       }
       
@@ -1601,9 +1596,9 @@ public class BlockManager {
       addStoredBlock(b, node, null, true);
     }
     for (Block b : toInvalidate) {
-      NameNode.stateChangeLog.info("BLOCK* processReport: block "
+      NameNode.stateChangeLog.info("BLOCK* processReport: "
           + b + " on " + node + " size " + b.getNumBytes()
-          + " does not belong to any file.");
+          + " does not belong to any file");
       addToInvalidates(b, node);
     }
     for (BlockToMarkCorrupt b : toCorrupt) {
@@ -1870,7 +1865,7 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
     int count = pendingDNMessages.count();
     if (count > 0) {
       LOG.info("Processing " + count + " messages from DataNodes " +
-          "that were previously queued during standby state.");
+          "that were previously queued during standby state");
     }
     processQueuedMessages(pendingDNMessages.takeAll());
     assert pendingDNMessages.count() == 0;
@@ -1927,9 +1922,9 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
           // the block report got a little bit delayed after the pipeline
           // closed. So, ignore this report, assuming we will get a
           // FINALIZED replica later. See HDFS-2791
-          LOG.info("Received an RBW replica for block " + storedBlock +
-              " on " + dn + ": ignoring it, since the block is " +
-              "complete with the same generation stamp.");
+          LOG.info("Received an RBW replica for " + storedBlock +
+              " on " + dn + ": ignoring it, since it is " +
+              "complete with the same genstamp");
           return null;
         } else {
           return new BlockToMarkCorrupt(storedBlock,
@@ -2041,7 +2036,7 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
       // If this block does not belong to anyfile, then we are done.
       NameNode.stateChangeLog.info("BLOCK* addStoredBlock: " + block + " on "
           + node + " size " + block.getNumBytes()
-          + " but it does not belong to any file.");
+          + " but it does not belong to any file");
       // we could add this block to invalidate set of this datanode.
       // it will happen in next block report otherwise.
       return block;
@@ -2158,9 +2153,8 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
       try {
         invalidateBlock(new BlockToMarkCorrupt(blk, null), node);
       } catch (IOException e) {
-        NameNode.stateChangeLog.info("NameNode.invalidateCorruptReplicas " +
-                                      "error in deleting bad block " + blk +
-                                      " on " + node, e);
+        NameNode.stateChangeLog.info("invalidateCorruptReplicas "
+            + "error in deleting bad block " + blk + " on " + node, e);
         gotException = true;
       }
     }
@@ -2308,7 +2302,7 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
       DatanodeDescriptor cur = it.next();
       if (cur.areBlockContentsStale()) {
         LOG.info("BLOCK* processOverReplicatedBlock: " +
-            "Postponing processing of over-replicated block " +
+            "Postponing processing of over-replicated " +
             block + " since datanode " + cur + " does not yet have up-to-date " +
             "block information.");
         postponeBlock(block);
@@ -2398,7 +2392,7 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
       //
       addToInvalidates(b, cur);
       NameNode.stateChangeLog.info("BLOCK* chooseExcessReplicates: "
-                +"("+cur+", "+b+") is added to invalidated blocks set.");
+                +"("+cur+", "+b+") is added to invalidated blocks set");
     }
   }
 
@@ -2540,7 +2534,7 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
     for (Block b : toInvalidate) {
       NameNode.stateChangeLog.info("BLOCK* addBlock: block "
           + b + " on " + node + " size " + b.getNumBytes()
-          + " does not belong to any file.");
+          + " does not belong to any file");
       addToInvalidates(b, node);
     }
     for (BlockToMarkCorrupt b : toCorrupt) {
@@ -2651,7 +2645,7 @@ assert storedBlock.findDatanode(dn) < 0 : "Block " + block
    * of live nodes.  If in startup safemode (or its 30-sec extension period),
    * then it gains speed by ignoring issues of excess replicas or nodes
    * that are decommissioned or in process of becoming decommissioned.
-   * If not in startup, then it calls {@link countNodes()} instead.
+   * If not in startup, then it calls {@link #countNodes(Block)} instead.
    * 
    * @param b - the block being tested
    * @return count of live nodes for this block

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeDescriptor.java

@@ -362,8 +362,7 @@ public class DatanodeDescriptor extends DatanodeInfo {
   void addBlockToBeRecovered(BlockInfoUnderConstruction block) {
     if(recoverBlocks.contains(block)) {
       // this prevents adding the same block twice to the recovery queue
-      BlockManager.LOG.info("Block " + block +
-                            " is already in the recovery queue.");
+      BlockManager.LOG.info(block + " is already in the recovery queue");
       return;
     }
     recoverBlocks.offer(block);

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java

@@ -584,7 +584,7 @@ public class DatanodeManager {
     if (node.isDecommissionInProgress()) {
       if (!blockManager.isReplicationInProgress(node)) {
         node.setDecommissioned();
-        LOG.info("Decommission complete for node " + node);
+        LOG.info("Decommission complete for " + node);
       }
     }
     return node.isDecommissioned();
@@ -593,8 +593,8 @@ public class DatanodeManager {
   /** Start decommissioning the specified datanode. */
   private void startDecommission(DatanodeDescriptor node) {
     if (!node.isDecommissionInProgress() && !node.isDecommissioned()) {
-      LOG.info("Start Decommissioning node " + node + " with " + 
-          node.numBlocks() +  " blocks.");
+      LOG.info("Start Decommissioning " + node + " with " + 
+          node.numBlocks() +  " blocks");
       heartbeatManager.startDecommission(node);
       node.decommissioningStatus.setStartTime(now());
       
@@ -606,7 +606,7 @@ public class DatanodeManager {
   /** Stop decommissioning the specified datanodes. */
   void stopDecommission(DatanodeDescriptor node) {
     if (node.isDecommissionInProgress() || node.isDecommissioned()) {
-      LOG.info("Stop Decommissioning node " + node);
+      LOG.info("Stop Decommissioning " + node);
       heartbeatManager.stopDecommission(node);
       blockManager.processOverReplicatedBlocksOnReCommission(node);
     }
@@ -658,17 +658,15 @@ public class DatanodeManager {
       throw new DisallowedDatanodeException(nodeReg);
     }
       
-    NameNode.stateChangeLog.info("BLOCK* NameSystem.registerDatanode: "
-        + "node registration from " + nodeReg
-        + " storage " + nodeReg.getStorageID());
+    NameNode.stateChangeLog.info("BLOCK* registerDatanode: from "
+        + nodeReg + " storage " + nodeReg.getStorageID());
 
     DatanodeDescriptor nodeS = datanodeMap.get(nodeReg.getStorageID());
     DatanodeDescriptor nodeN = host2DatanodeMap.getDatanodeByXferAddr(
         nodeReg.getIpAddr(), nodeReg.getXferPort());
       
     if (nodeN != null && nodeN != nodeS) {
-      NameNode.LOG.info("BLOCK* NameSystem.registerDatanode: "
-                        + "node from name: " + nodeN);
+      NameNode.LOG.info("BLOCK* registerDatanode: " + nodeN);
       // nodeN previously served a different data storage, 
       // which is not served by anybody anymore.
       removeDatanode(nodeN);
@@ -683,8 +681,8 @@ public class DatanodeManager {
         // storage. We do not need to remove old data blocks, the delta will
         // be calculated on the next block report from the datanode
         if(NameNode.stateChangeLog.isDebugEnabled()) {
-          NameNode.stateChangeLog.debug("BLOCK* NameSystem.registerDatanode: "
-                                        + "node restarted.");
+          NameNode.stateChangeLog.debug("BLOCK* registerDatanode: "
+              + "node restarted.");
         }
       } else {
         // nodeS is found
@@ -696,11 +694,9 @@ public class DatanodeManager {
           value in "VERSION" file under the data directory of the datanode,
           but this is might not work if VERSION file format has changed 
        */        
-        NameNode.stateChangeLog.info( "BLOCK* NameSystem.registerDatanode: "
-                                      + "node " + nodeS
-                                      + " is replaced by " + nodeReg + 
-                                      " with the same storageID " +
-                                      nodeReg.getStorageID());
+        NameNode.stateChangeLog.info("BLOCK* registerDatanode: " + nodeS
+            + " is replaced by " + nodeReg + " with the same storageID "
+            + nodeReg.getStorageID());
       }
       // update cluster map
       getNetworkTopology().remove(nodeS);

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/common/Storage.java

@@ -433,7 +433,7 @@ public abstract class Storage extends StorageInfo {
         if (!root.exists()) {
           // storage directory does not exist
           if (startOpt != StartupOption.FORMAT) {
-            LOG.info("Storage directory " + rootPath + " does not exist.");
+            LOG.info("Storage directory " + rootPath + " does not exist");
             return StorageState.NON_EXISTENT;
           }
           LOG.info(rootPath + " does not exist. Creating ...");
@@ -442,7 +442,7 @@ public abstract class Storage extends StorageInfo {
         }
         // or is inaccessible
         if (!root.isDirectory()) {
-          LOG.info(rootPath + "is not a directory.");
+          LOG.info(rootPath + "is not a directory");
           return StorageState.NON_EXISTENT;
         }
         if (!root.canWrite()) {
@@ -539,34 +539,34 @@ public abstract class Storage extends StorageInfo {
       switch(curState) {
       case COMPLETE_UPGRADE:  // mv previous.tmp -> previous
         LOG.info("Completing previous upgrade for storage directory " 
-                 + rootPath + ".");
+                 + rootPath);
         rename(getPreviousTmp(), getPreviousDir());
         return;
       case RECOVER_UPGRADE:   // mv previous.tmp -> current
         LOG.info("Recovering storage directory " + rootPath
-                 + " from previous upgrade.");
+                 + " from previous upgrade");
         if (curDir.exists())
           deleteDir(curDir);
         rename(getPreviousTmp(), curDir);
         return;
       case COMPLETE_ROLLBACK: // rm removed.tmp
         LOG.info("Completing previous rollback for storage directory "
-                 + rootPath + ".");
+                 + rootPath);
         deleteDir(getRemovedTmp());
         return;
       case RECOVER_ROLLBACK:  // mv removed.tmp -> current
         LOG.info("Recovering storage directory " + rootPath
-                 + " from previous rollback.");
+                 + " from previous rollback");
         rename(getRemovedTmp(), curDir);
         return;
       case COMPLETE_FINALIZE: // rm finalized.tmp
         LOG.info("Completing previous finalize for storage directory "
-                 + rootPath + ".");
+                 + rootPath);
         deleteDir(getFinalizedTmp());
         return;
       case COMPLETE_CHECKPOINT: // mv lastcheckpoint.tmp -> previous.checkpoint
         LOG.info("Completing previous checkpoint for storage directory " 
-                 + rootPath + ".");
+                 + rootPath);
         File prevCkptDir = getPreviousCheckpoint();
         if (prevCkptDir.exists())
           deleteDir(prevCkptDir);
@@ -574,7 +574,7 @@ public abstract class Storage extends StorageInfo {
         return;
       case RECOVER_CHECKPOINT:  // mv lastcheckpoint.tmp -> current
         LOG.info("Recovering storage directory " + rootPath
-                 + " from failed checkpoint.");
+                 + " from failed checkpoint");
         if (curDir.exists())
           deleteDir(curDir);
         rename(getLastCheckpointTmp(), curDir);
@@ -629,7 +629,7 @@ public abstract class Storage extends StorageInfo {
       FileLock newLock = tryLock();
       if (newLock == null) {
         String msg = "Cannot lock storage " + this.root 
-          + ". The directory is already locked.";
+          + ". The directory is already locked";
         LOG.info(msg);
         throw new IOException(msg);
       }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java

@@ -641,8 +641,7 @@ class BPServiceActor implements Runnable {
     try {
       Thread.sleep(millis);
     } catch (InterruptedException ie) {
-      LOG.info("BPOfferService " + this +
-          " interrupted while " + stateString);
+      LOG.info("BPOfferService " + this + " interrupted while " + stateString);
     }
   }
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockPoolSliceScanner.java

@@ -154,7 +154,7 @@ class BlockPoolSliceScanner {
     }
     this.scanPeriod = hours * 3600 * 1000;
     LOG.info("Periodic Block Verification Scanner initialized with interval "
-        + hours + " hours for block pool " + bpid + ".");
+        + hours + " hours for block pool " + bpid);
 
     // get the list of blocks and arrange them in random order
     List<Block> arr = dataset.getFinalizedBlocks(blockPoolId);
@@ -310,12 +310,12 @@ class BlockPoolSliceScanner {
   }
   
   private void handleScanFailure(ExtendedBlock block) {
-    LOG.info("Reporting bad block " + block);
+    LOG.info("Reporting bad " + block);
     try {
       datanode.reportBadBlocks(block);
     } catch (IOException ie) {
       // it is bad, but not bad enough to shutdown the scanner
-      LOG.warn("Cannot report bad block=" + block.getBlockId());
+      LOG.warn("Cannot report bad " + block.getBlockId());
     }
   }
   
@@ -411,7 +411,7 @@ class BlockPoolSliceScanner {
 
         // If the block does not exists anymore, then its not an error
         if (!dataset.contains(block)) {
-          LOG.info(block + " is no longer in the dataset.");
+          LOG.info(block + " is no longer in the dataset");
           deleteBlock(block.getLocalBlock());
           return;
         }
@@ -424,7 +424,7 @@ class BlockPoolSliceScanner {
         // is a block really deleted by mistake, DirectoryScan should catch it.
         if (e instanceof FileNotFoundException ) {
           LOG.info("Verification failed for " + block +
-              ". It may be due to race with write.");
+              " - may be due to race with write");
           deleteBlock(block.getLocalBlock());
           return;
         }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockPoolSliceStorage.java

@@ -332,7 +332,7 @@ public class BlockPoolSliceStorage extends Storage {
     // 4.rename <SD>/curernt/<bpid>/previous.tmp to <SD>/curernt/<bpid>/previous
     rename(bpTmpDir, bpPrevDir);
     LOG.info("Upgrade of block pool " + blockpoolID + " at " + bpSd.getRoot()
-        + " is complete.");
+        + " is complete");
   }
 
   /**
@@ -409,7 +409,7 @@ public class BlockPoolSliceStorage extends Storage {
     
     // 3. delete removed.tmp dir
     deleteDir(tmpDir);
-    LOG.info("Rollback of " + bpSd.getRoot() + " is complete.");
+    LOG.info("Rollback of " + bpSd.getRoot() + " is complete");
   }
 
   /*

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockReceiver.java

@@ -357,7 +357,7 @@ class BlockReceiver implements Closeable {
   private void handleMirrorOutError(IOException ioe) throws IOException {
     String bpid = block.getBlockPoolId();
     LOG.info(datanode.getDNRegistrationForBP(bpid)
-        + ":Exception writing block " + block + " to mirror " + mirrorAddr, ioe);
+        + ":Exception writing " + block + " to mirror " + mirrorAddr, ioe);
     if (Thread.interrupted()) { // shut down if the thread is interrupted
       throw ioe;
     } else { // encounter an error while writing to mirror
@@ -379,16 +379,16 @@ class BlockReceiver implements Closeable {
       LOG.warn("Checksum error in block " + block + " from " + inAddr, ce);
       if (srcDataNode != null) {
         try {
-          LOG.info("report corrupt block " + block + " from datanode " +
+          LOG.info("report corrupt " + block + " from datanode " +
                     srcDataNode + " to namenode");
           datanode.reportRemoteBadBlock(srcDataNode, block);
         } catch (IOException e) {
-          LOG.warn("Failed to report bad block " + block + 
+          LOG.warn("Failed to report bad " + block + 
                     " from datanode " + srcDataNode + " to namenode");
         }
       }
-      throw new IOException("Unexpected checksum mismatch " + 
-                            "while writing " + block + " from " + inAddr);
+      throw new IOException("Unexpected checksum mismatch while writing "
+          + block + " from " + inAddr);
     }
   }
   
@@ -518,7 +518,7 @@ class BlockReceiver implements Closeable {
           // If this is a partial chunk, then read in pre-existing checksum
           if (firstByteInBlock % bytesPerChecksum != 0) {
             LOG.info("Packet starts at " + firstByteInBlock +
-                     " for block " + block +
+                     " for " + block +
                      " which is not a multiple of bytesPerChecksum " +
                      bytesPerChecksum);
             long offsetInChecksum = BlockMetadataHeader.getHeaderSize() +
@@ -662,7 +662,7 @@ class BlockReceiver implements Closeable {
       }
 
     } catch (IOException ioe) {
-      LOG.info("Exception in receiveBlock for " + block, ioe);
+      LOG.info("Exception for " + block, ioe);
       throw ioe;
     } finally {
       if (!responderClosed) { // Abnormal termination of the flow above
@@ -733,10 +733,9 @@ class BlockReceiver implements Closeable {
     int checksumSize = diskChecksum.getChecksumSize();
     blkoff = blkoff - sizePartialChunk;
     LOG.info("computePartialChunkCrc sizePartialChunk " + 
-              sizePartialChunk +
-              " block " + block +
-              " offset in block " + blkoff +
-              " offset in metafile " + ckoff);
+              sizePartialChunk + " " + block +
+              " block offset " + blkoff +
+              " metafile offset " + ckoff);
 
     // create an input stream from the block file
     // and read in partial crc chunk into temporary buffer
@@ -758,7 +757,7 @@ class BlockReceiver implements Closeable {
     partialCrc = DataChecksum.newDataChecksum(
         diskChecksum.getChecksumType(), diskChecksum.getBytesPerChecksum());
     partialCrc.update(buf, 0, sizePartialChunk);
-    LOG.info("Read in partial CRC chunk from disk for block " + block);
+    LOG.info("Read in partial CRC chunk from disk for " + block);
 
     // paranoia! verify that the pre-computed crc matches what we
     // recalculated just now
@@ -973,7 +972,7 @@ class BlockReceiver implements Closeable {
                       "HDFS_WRITE", clientname, offset,
                       dnR.getStorageID(), block, endTime-startTime));
               } else {
-                LOG.info("Received block " + block + " of size "
+                LOG.info("Received " + block + " size "
                     + block.getNumBytes() + " from " + inAddr);
               }
             }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockSender.java

@@ -503,7 +503,7 @@ class BlockSender implements java.io.Closeable {
          * part of a block and then decides not to read the rest (but leaves
          * the socket open).
          */
-          LOG.info("BlockSender.sendChunks() exception: ", e);
+          LOG.info("exception: ", e);
       } else {
         /* Exception while writing to the client. Connection closure from
          * the other end is mostly the case and we do not care much about

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java

@@ -481,8 +481,7 @@ public class DataNode extends Configured
       blockScanner = new DataBlockScanner(this, data, conf);
       blockScanner.start();
     } else {
-      LOG.info("Periodic Block Verification scan is disabled because " +
-               reason + ".");
+      LOG.info("Periodic Block Verification scan disabled because " + reason);
     }
   }
   
@@ -511,7 +510,7 @@ public class DataNode extends Configured
       directoryScanner.start();
     } else {
       LOG.info("Periodic Directory Tree Verification scan is disabled because " +
-               reason + ".");
+               reason);
     }
   }
   
@@ -1262,7 +1261,7 @@ public class DataNode extends Configured
           xfersBuilder.append(xferTargets[i]);
           xfersBuilder.append(" ");
         }
-        LOG.info(bpReg + " Starting thread to transfer block " + 
+        LOG.info(bpReg + " Starting thread to transfer " + 
                  block + " to " + xfersBuilder);                       
       }
 
@@ -2049,7 +2048,7 @@ public class DataNode extends Configured
     ExtendedBlock block = rb.getBlock();
     DatanodeInfo[] targets = rb.getLocations();
     
-    LOG.info(who + " calls recoverBlock(block=" + block
+    LOG.info(who + " calls recoverBlock(" + block
         + ", targets=[" + Joiner.on(", ").join(targets) + "]"
         + ", newGenerationStamp=" + rb.getNewGenerationStamp() + ")");
   }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataStorage.java

@@ -155,11 +155,11 @@ public class DataStorage extends Storage {
           break;
         case NON_EXISTENT:
           // ignore this storage
-          LOG.info("Storage directory " + dataDir + " does not exist.");
+          LOG.info("Storage directory " + dataDir + " does not exist");
           it.remove();
           continue;
         case NOT_FORMATTED: // format
-          LOG.info("Storage directory " + dataDir + " is not formatted.");
+          LOG.info("Storage directory " + dataDir + " is not formatted");
           LOG.info("Formatting ...");
           format(sd, nsInfo);
           break;
@@ -482,7 +482,7 @@ public class DataStorage extends Storage {
     
     // 5. Rename <SD>/previous.tmp to <SD>/previous
     rename(tmpDir, prevDir);
-    LOG.info("Upgrade of " + sd.getRoot()+ " is complete.");
+    LOG.info("Upgrade of " + sd.getRoot()+ " is complete");
     addBlockPoolStorage(nsInfo.getBlockPoolID(), bpStorage);
   }
 
@@ -556,7 +556,7 @@ public class DataStorage extends Storage {
     rename(prevDir, curDir);
     // delete tmp dir
     deleteDir(tmpDir);
-    LOG.info("Rollback of " + sd.getRoot() + " is complete.");
+    LOG.info("Rollback of " + sd.getRoot() + " is complete");
   }
   
   /**
@@ -596,9 +596,9 @@ public class DataStorage extends Storage {
               deleteDir(bbwDir);
             }
           } catch(IOException ex) {
-            LOG.error("Finalize upgrade for " + dataDirPath + " failed.", ex);
+            LOG.error("Finalize upgrade for " + dataDirPath + " failed", ex);
           }
-          LOG.info("Finalize upgrade for " + dataDirPath + " is complete.");
+          LOG.info("Finalize upgrade for " + dataDirPath + " is complete");
         }
         @Override
         public String toString() { return "Finalize " + dataDirPath; }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataXceiver.java

@@ -170,7 +170,7 @@ class DataXceiver extends Receiver implements Runnable {
         } catch (InvalidMagicNumberException imne) {
           LOG.info("Failed to read expected encryption handshake from client " +
               "at " + s.getInetAddress() + ". Perhaps the client is running an " +
-              "older version of Hadoop which does not support encryption.");
+              "older version of Hadoop which does not support encryption");
           return;
         }
         input = encryptedStreams.in;
@@ -367,9 +367,8 @@ class DataXceiver extends Receiver implements Runnable {
     // make a copy here.
     final ExtendedBlock originalBlock = new ExtendedBlock(block);
     block.setNumBytes(dataXceiverServer.estimateBlockSize);
-    LOG.info("Receiving block " + block + 
-             " src: " + remoteAddress +
-             " dest: " + localAddress);
+    LOG.info("Receiving " + block + " src: " + remoteAddress + " dest: "
+        + localAddress);
 
     // reply to upstream datanode or client 
     final DataOutputStream replyOut = new DataOutputStream(
@@ -478,9 +477,9 @@ class DataXceiver extends Receiver implements Runnable {
                       block + " to mirror " + mirrorNode + ": " + e);
             throw e;
           } else {
-            LOG.info(datanode + ":Exception transfering block " +
+            LOG.info(datanode + ":Exception transfering " +
                      block + " to mirror " + mirrorNode +
-                     ". continuing without the mirror.", e);
+                     "- continuing without the mirror", e);
           }
         }
       }
@@ -528,10 +527,8 @@ class DataXceiver extends Receiver implements Runnable {
       if (isDatanode ||
           stage == BlockConstructionStage.PIPELINE_CLOSE_RECOVERY) {
         datanode.closeBlock(block, DataNode.EMPTY_DEL_HINT);
-        LOG.info("Received block " + block + 
-                 " src: " + remoteAddress +
-                 " dest: " + localAddress +
-                 " of size " + block.getNumBytes());
+        LOG.info("Received " + block + " src: " + remoteAddress + " dest: "
+            + localAddress + " of size " + block.getNumBytes());
       }
 
       
@@ -674,7 +671,7 @@ class DataXceiver extends Receiver implements Runnable {
       datanode.metrics.incrBytesRead((int) read);
       datanode.metrics.incrBlocksRead();
       
-      LOG.info("Copied block " + block + " to " + s.getRemoteSocketAddress());
+      LOG.info("Copied " + block + " to " + s.getRemoteSocketAddress());
     } catch (IOException ioe) {
       isOpSuccess = false;
       LOG.info("opCopyBlock " + block + " received exception " + ioe);
@@ -797,8 +794,7 @@ class DataXceiver extends Receiver implements Runnable {
       // notify name node
       datanode.notifyNamenodeReceivedBlock(block, delHint);
 
-      LOG.info("Moved block " + block + 
-          " from " + s.getRemoteSocketAddress());
+      LOG.info("Moved " + block + " from " + s.getRemoteSocketAddress());
       
     } catch (IOException ioe) {
       opStatus = ERROR;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetAsyncDiskService.java

@@ -136,7 +136,7 @@ class FsDatasetAsyncDiskService {
     if (executors == null) {
       LOG.warn("AsyncDiskService has already shut down.");
     } else {
-      LOG.info("Shutting down all async disk service threads...");
+      LOG.info("Shutting down all async disk service threads");
       
       for (Map.Entry<File, ThreadPoolExecutor> e : executors.entrySet()) {
         e.getValue().shutdown();
@@ -144,7 +144,7 @@ class FsDatasetAsyncDiskService {
       // clear the executor map so that calling execute again will fail.
       executors = null;
       
-      LOG.info("All async disk service threads have been shut down.");
+      LOG.info("All async disk service threads have been shut down");
     }
   }
 
@@ -154,7 +154,7 @@ class FsDatasetAsyncDiskService {
    */
   void deleteAsync(FsVolumeImpl volume, File blockFile, File metaFile,
       ExtendedBlock block) {
-    LOG.info("Scheduling block " + block.getLocalBlock()
+    LOG.info("Scheduling " + block.getLocalBlock()
         + " file " + blockFile + " for deletion");
     ReplicaFileDeleteTask deletionTask = new ReplicaFileDeleteTask(
         volume, blockFile, metaFile, block);
@@ -198,8 +198,8 @@ class FsDatasetAsyncDiskService {
           datanode.notifyNamenodeDeletedBlock(block);
         }
         volume.decDfsUsed(block.getBlockPoolId(), dfsBytes);
-        LOG.info("Deleted block " + block.getBlockPoolId() + " "
-            + block.getLocalBlock() + " at file " + blockFile);
+        LOG.info("Deleted " + block.getBlockPoolId() + " "
+            + block.getLocalBlock() + " file " + blockFile);
       }
     }
   }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java

@@ -425,7 +425,7 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
       return;
     }
     if (newlen > oldlen) {
-      throw new IOException("Cannout truncate block to from oldlen (=" + oldlen
+      throw new IOException("Cannot truncate block to from oldlen (=" + oldlen
           + ") to newlen (=" + newlen + ")");
     }
 
@@ -481,7 +481,7 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
           " should be greater than the replica " + b + "'s generation stamp");
     }
     ReplicaInfo replicaInfo = getReplicaInfo(b);
-    LOG.info("Appending to replica " + replicaInfo);
+    LOG.info("Appending to " + replicaInfo);
     if (replicaInfo.getState() != ReplicaState.FINALIZED) {
       throw new ReplicaNotFoundException(
           ReplicaNotFoundException.UNFINALIZED_REPLICA + b);
@@ -689,7 +689,7 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
   public synchronized ReplicaInPipeline recoverRbw(ExtendedBlock b,
       long newGS, long minBytesRcvd, long maxBytesRcvd)
       throws IOException {
-    LOG.info("Recover the RBW replica " + b);
+    LOG.info("Recover RBW replica " + b);
 
     ReplicaInfo replicaInfo = getReplicaInfo(b.getBlockPoolId(), b.getBlockId());
     
@@ -700,7 +700,7 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
     }
     ReplicaBeingWritten rbw = (ReplicaBeingWritten)replicaInfo;
     
-    LOG.info("Recovering replica " + rbw);
+    LOG.info("Recovering " + rbw);
 
     // Stop the previous writer
     rbw.stopWriter();
@@ -736,8 +736,8 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
     final long blockId = b.getBlockId();
     final long expectedGs = b.getGenerationStamp();
     final long visible = b.getNumBytes();
-    LOG.info("Convert replica " + b
-        + " from Temporary to RBW, visible length=" + visible);
+    LOG.info("Convert " + b + " from Temporary to RBW, visible length="
+        + visible);
 
     final ReplicaInPipeline temp;
     {
@@ -1415,8 +1415,7 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
   static ReplicaRecoveryInfo initReplicaRecovery(String bpid,
       ReplicaMap map, Block block, long recoveryId) throws IOException {
     final ReplicaInfo replica = map.get(bpid, block.getBlockId());
-    LOG.info("initReplicaRecovery: block=" + block
-        + ", recoveryId=" + recoveryId
+    LOG.info("initReplicaRecovery: " + block + ", recoveryId=" + recoveryId
         + ", replica=" + replica);
 
     //check replica
@@ -1485,7 +1484,7 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
     //get replica
     final String bpid = oldBlock.getBlockPoolId();
     final ReplicaInfo replica = volumeMap.get(bpid, oldBlock.getBlockId());
-    LOG.info("updateReplica: block=" + oldBlock
+    LOG.info("updateReplica: " + oldBlock
         + ", recoveryId=" + recoveryId
         + ", length=" + newlength
         + ", replica=" + replica);

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java

@@ -140,7 +140,7 @@ public class FSDirectory implements Closeable {
         DFSConfigKeys.DFS_NAMENODE_NAME_CACHE_THRESHOLD_KEY,
         DFSConfigKeys.DFS_NAMENODE_NAME_CACHE_THRESHOLD_DEFAULT);
     NameNode.LOG.info("Caching file names occuring more than " + threshold
-        + " times ");
+        + " times");
     nameCache = new NameCache<ByteArray>(threshold);
     namesystem = ns;
   }
@@ -253,15 +253,12 @@ public class FSDirectory implements Closeable {
       writeUnlock();
     }
     if (newNode == null) {
-      NameNode.stateChangeLog.info("DIR* FSDirectory.addFile: "
-                                   +"failed to add "+path
-                                   +" to the file system");
+      NameNode.stateChangeLog.info("DIR* addFile: failed to add " + path);
       return null;
     }
 
     if(NameNode.stateChangeLog.isDebugEnabled()) {
-      NameNode.stateChangeLog.debug("DIR* FSDirectory.addFile: "
-          +path+" is added to the file system");
+      NameNode.stateChangeLog.debug("DIR* addFile: " + path + " is added");
     }
     return newNode;
   }
@@ -2119,16 +2116,13 @@ public class FSDirectory implements Closeable {
       writeUnlock();
     }
     if (newNode == null) {
-      NameNode.stateChangeLog.info("DIR* FSDirectory.addSymlink: "
-                                   +"failed to add "+path
-                                   +" to the file system");
+      NameNode.stateChangeLog.info("DIR* addSymlink: failed to add " + path);
       return null;
     }
     fsImage.getEditLog().logSymlink(path, target, modTime, modTime, newNode);
     
     if(NameNode.stateChangeLog.isDebugEnabled()) {
-      NameNode.stateChangeLog.debug("DIR* FSDirectory.addSymlink: "
-          +path+" is added to the file system");
+      NameNode.stateChangeLog.debug("DIR* addSymlink: " + path + " is added");
     }
     return newNode;
   }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLog.java

@@ -900,7 +900,7 @@ public class FSEditLog implements LogsPurgeable {
    * in the new log.
    */
   synchronized long rollEditLog() throws IOException {
-    LOG.info("Rolling edit logs.");
+    LOG.info("Rolling edit logs");
     endCurrentLogSegment(true);
     
     long nextTxId = getLastWrittenTxId() + 1;
@@ -915,7 +915,7 @@ public class FSEditLog implements LogsPurgeable {
    */
   public synchronized void startLogSegment(long txid, 
       boolean abortCurrentLogSegment) throws IOException {
-    LOG.info("Namenode started a new log segment at txid " + txid);
+    LOG.info("Started a new log segment at txid " + txid);
     if (isSegmentOpen()) {
       if (getLastWrittenTxId() == txid - 1) {
         //In sync with the NN, so end and finalize the current segment`

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLogLoader.java

@@ -90,7 +90,7 @@ public class FSEditLogLoader {
                                  expectedStartingTxId, recovery);
       FSImage.LOG.info("Edits file " + edits.getName() 
           + " of size " + edits.length() + " edits # " + numEdits 
-          + " loaded in " + (now()-startTime)/1000 + " seconds.");
+          + " loaded in " + (now()-startTime)/1000 + " seconds");
       return numEdits;
     } finally {
       edits.close();

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java

@@ -656,11 +656,11 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
         editLog.recoverUnclosedStreams();
         
         LOG.info("Catching up to latest edits from old active before " +
-            "taking over writer role in edits logs.");
+            "taking over writer role in edits logs");
         editLogTailer.catchupDuringFailover();
         blockManager.setPostponeBlocksFromFuture(false);
         
-        LOG.info("Reprocessing replication and invalidation queues...");
+        LOG.info("Reprocessing replication and invalidation queues");
         blockManager.getDatanodeManager().markAllDatanodesStale();
         blockManager.clearQueues();
         blockManager.processAllPendingDNMessages();
@@ -1969,7 +1969,7 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
       if (force) {
         // close now: no need to wait for soft lease expiration and 
         // close only the file src
-        LOG.info("recoverLease: recover lease " + lease + ", src=" + src +
+        LOG.info("recoverLease: " + lease + ", src=" + src +
           " from client " + pendingFile.getClientName());
         internalReleaseLease(lease, src, holder);
       } else {
@@ -1981,8 +1981,8 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
         // period, then start lease recovery.
         //
         if (lease.expiredSoftLimit()) {
-          LOG.info("startFile: recover lease " + lease + ", src=" + src +
-              " from client " + pendingFile.getClientName());
+          LOG.info("startFile: recover " + lease + ", src=" + src + " client "
+              + pendingFile.getClientName());
           boolean isClosed = internalReleaseLease(lease, src, null);
           if(!isClosed)
             throw new RecoveryInProgressException(
@@ -2158,7 +2158,7 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
           }
 
           // The retry case ("b" above) -- abandon the old block.
-          NameNode.stateChangeLog.info("BLOCK* NameSystem.allocateBlock: " +
+          NameNode.stateChangeLog.info("BLOCK* allocateBlock: " +
               "caught retry for allocation of a new block in " +
               src + ". Abandoning old block " + lastBlockInFile);
           dir.removeBlock(src, pendingFile, lastBlockInFile);
@@ -2394,10 +2394,10 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
         // See HDFS-3031.
         final Block realLastBlock = ((INodeFile)inode).getLastBlock();
         if (Block.matchingIdAndGenStamp(last, realLastBlock)) {
-          NameNode.stateChangeLog.info("DIR* NameSystem.completeFile: " +
-              "received request from " + holder + " to complete file " + src +
+          NameNode.stateChangeLog.info("DIR* completeFile: " +
+              "request from " + holder + " to complete " + src +
               " which is already closed. But, it appears to be an RPC " +
-              "retry. Returning success.");
+              "retry. Returning success");
           return true;
         }
       }
@@ -2412,8 +2412,8 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
 
     finalizeINodeFileUnderConstruction(src, pendingFile);
 
-    NameNode.stateChangeLog.info("DIR* NameSystem.completeFile: file " + src
-                                  + " is closed by " + holder);
+    NameNode.stateChangeLog.info("DIR* completeFile: " + src + " is closed by "
+        + holder);
     return true;
   }
 
@@ -2438,8 +2438,8 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
     nextGenerationStamp();
     b.setGenerationStamp(getGenerationStamp());
     b = dir.addBlock(src, inodes, b, targets);
-    NameNode.stateChangeLog.info("BLOCK* NameSystem.allocateBlock: "
-                                 +src+ ". " + blockPoolId + " "+ b);
+    NameNode.stateChangeLog.info("BLOCK* allocateBlock: " + src + ". "
+        + blockPoolId + " " + b);
     return b;
   }
 
@@ -2457,8 +2457,8 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
         //
         for (BlockInfo block: v.getBlocks()) {
           if (!block.isComplete()) {
-            LOG.info("BLOCK* NameSystem.checkFileProgress: "
-                + "block " + block + " has not reached minimal replication "
+            LOG.info("BLOCK* checkFileProgress: " + block
+                + " has not reached minimal replication "
                 + blockManager.minReplication);
             return false;
           }
@@ -2469,8 +2469,8 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
         //
         BlockInfo b = v.getPenultimateBlock();
         if (b != null && !b.isComplete()) {
-          LOG.info("BLOCK* NameSystem.checkFileProgress: "
-              + "block " + b + " has not reached minimal replication "
+          LOG.info("BLOCK* checkFileProgress: " + b
+              + " has not reached minimal replication "
               + blockManager.minReplication);
           return false;
         }
@@ -2943,8 +2943,7 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
    */
   void fsync(String src, String clientName) 
       throws IOException, UnresolvedLinkException {
-    NameNode.stateChangeLog.info("BLOCK* NameSystem.fsync: file "
-                                  + src + " for " + clientName);
+    NameNode.stateChangeLog.info("BLOCK* fsync: " + src + " for " + clientName);
     writeLock();
     try {
       checkOperation(OperationCategory.WRITE);
@@ -2975,7 +2974,7 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
   boolean internalReleaseLease(Lease lease, String src, 
       String recoveryLeaseHolder) throws AlreadyBeingCreatedException, 
       IOException, UnresolvedLinkException {
-    LOG.info("Recovering lease=" + lease + ", src=" + src);
+    LOG.info("Recovering " + lease + ", src=" + src);
     assert !isInSafeMode();
     assert hasWriteLock();
 
@@ -3616,7 +3615,7 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
                               "in order to create namespace image.");
       }
       getFSImage().saveNamespace(this);
-      LOG.info("New namespace image has been created.");
+      LOG.info("New namespace image has been created");
     } finally {
       readUnlock();
     }
@@ -3834,11 +3833,11 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
       }
       long timeInSafemode = now() - startTime;
       NameNode.stateChangeLog.info("STATE* Leaving safe mode after " 
-                                    + timeInSafemode/1000 + " secs.");
+                                    + timeInSafemode/1000 + " secs");
       NameNode.getNameNodeMetrics().setSafeModeTime((int) timeInSafemode);
       
       if (reached >= 0) {
-        NameNode.stateChangeLog.info("STATE* Safe mode is OFF."); 
+        NameNode.stateChangeLog.info("STATE* Safe mode is OFF"); 
       }
       reached = -1;
       safeMode = null;
@@ -4158,7 +4157,7 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
         }
       }
       if (!fsRunning) {
-        LOG.info("NameNode is being shutdown, exit SafeModeMonitor thread. ");
+        LOG.info("NameNode is being shutdown, exit SafeModeMonitor thread");
       } else {
         // leave safe mode and stop the monitor
         leaveSafeMode();
@@ -4343,7 +4342,7 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
       if (isEditlogOpenForWrite) {
         getEditLog().logSyncAll();
       }
-      NameNode.stateChangeLog.info("STATE* Safe mode is ON. "
+      NameNode.stateChangeLog.info("STATE* Safe mode is ON"
           + safeMode.getTurnOffTip());
     } finally {
       writeUnlock();
@@ -4358,7 +4357,7 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
     writeLock();
     try {
       if (!isInSafeMode()) {
-        NameNode.stateChangeLog.info("STATE* Safe mode is already OFF."); 
+        NameNode.stateChangeLog.info("STATE* Safe mode is already OFF"); 
         return;
       }
       safeMode.leave();
@@ -4712,7 +4711,7 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
     try {
       checkOperation(OperationCategory.WRITE);
       
-      NameNode.stateChangeLog.info("*DIR* NameNode.reportBadBlocks");
+      NameNode.stateChangeLog.info("*DIR* reportBadBlocks");
       for (int i = 0; i < blocks.length; i++) {
         ExtendedBlock blk = blocks[i].getBlock();
         DatanodeInfo[] nodes = blocks[i].getLocations();

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/GetDelegationTokenServlet.java

@@ -77,7 +77,7 @@ public class GetDelegationTokenServlet extends DfsServlet {
       });
 
     } catch(Exception e) {
-      LOG.info("Exception while sending token. Re-throwing. ", e);
+      LOG.info("Exception while sending token. Re-throwing ", e);
       resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
     } finally {
       if(dos != null) dos.close();

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/LeaseManager.java

@@ -429,7 +429,7 @@ public class LeaseManager {
         return;
       }
 
-      LOG.info("Lease " + oldest + " has expired hard limit");
+      LOG.info(oldest + " has expired hard limit");
 
       final List<String> removing = new ArrayList<String>();
       // need to create a copy of the oldest lease paths, becuase 
@@ -441,15 +441,14 @@ public class LeaseManager {
       for(String p : leasePaths) {
         try {
           if(fsnamesystem.internalReleaseLease(oldest, p, HdfsServerConstants.NAMENODE_LEASE_HOLDER)) {
-            LOG.info("Lease recovery for file " + p +
-                          " is complete. File closed.");
+            LOG.info("Lease recovery for " + p + " is complete. File closed.");
             removing.add(p);
           } else {
-            LOG.info("Started block recovery for file " + p +
-                          " lease " + oldest);
+            LOG.info("Started block recovery " + p + " lease " + oldest);
           }
         } catch (IOException e) {
-          LOG.error("Cannot release the path "+p+" in the lease "+oldest, e);
+          LOG.error("Cannot release the path " + p + " in the lease "
+              + oldest, e);
           removing.add(p);
         }
       }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/MetaRecoveryContext.java

@@ -102,7 +102,7 @@ public final class MetaRecoveryContext  {
       "without prompting. " + 
       "(c/s/q/a)\n", "c", "s", "q", "a");
     if (answer.equals("c")) {
-      LOG.info("Continuing.");
+      LOG.info("Continuing");
       return;
     } else if (answer.equals("s")) {
       throw new RequestStopException("user requested stop");