HDFS-4033. Miscellaneous findbugs 2 fixes. Contributed by Eli Collins

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1430534 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocolPB/PBHelper.java

@@ -679,6 +679,8 @@ public class PBHelper {
     case DatanodeProtocol.DNA_SHUTDOWN:
       builder.setAction(BlockCommandProto.Action.SHUTDOWN);
       break;
+    default:
+      throw new AssertionError("Invalid action");
     }
     Block[] blocks = cmd.getBlocks();
     for (int i = 0; i < blocks.length; i++) {

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java

@@ -1370,7 +1370,7 @@ public class Balancer {
             " in this iteration");
       }
 
-      formatter.format("%-24s %10d  %19s  %18s  %17s\n", 
+      formatter.format("%-24s %10d  %19s  %18s  %17s%n",
           DateFormat.getDateTimeInstance().format(new Date()),
           iteration,
           StringUtils.byteDesc(bytesMoved.get()),

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

@@ -62,6 +62,7 @@ import org.apache.hadoop.hdfs.web.resources.DelegationParam;
 import org.apache.hadoop.hdfs.web.resources.DoAsParam;
 import org.apache.hadoop.hdfs.web.resources.UserParam;
 import org.apache.hadoop.http.HtmlQuoting;
+import org.apache.hadoop.io.IOUtils;
 import org.apache.hadoop.net.NetUtils;
 import org.apache.hadoop.security.AccessControlException;
 import org.apache.hadoop.security.SecurityUtil;
@@ -181,7 +182,7 @@ public class JspHelper {
         s.setSoTimeout(HdfsServerConstants.READ_TIMEOUT);
       } catch (IOException e) {
         deadNodes.add(chosenNode);
-        s.close();
+        IOUtils.closeSocket(s);
         s = null;
         failures++;
       }
@@ -388,6 +389,8 @@ public class JspHelper {
           int dint = d1.getVolumeFailures() - d2.getVolumeFailures();
           ret = (dint < 0) ? -1 : ((dint > 0) ? 1 : 0);
           break;
+        default:
+          throw new IllegalArgumentException("Invalid sortField");
         }
         return (sortOrder == SORT_ORDER_DSC) ? -ret : ret;
       }

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

@@ -703,7 +703,7 @@ class BlockPoolSliceScanner {
           (info.lastScanType == ScanType.VERIFICATION_SCAN) ? "local" : "none"; 
         buffer.append(String.format("%-26s : status : %-6s type : %-6s" +
                                     " scan time : " +
-                                    "%-15d %s\n", info.block, 
+                                    "%-15d %s%n", info.block, 
                                     (info.lastScanOk ? "ok" : "failed"),
                                     scanType, scanTime,
                                     (scanTime <= 0) ? "not yet verified" : 
@@ -716,21 +716,21 @@ class BlockPoolSliceScanner {
     double pctProgress = (totalBytesToScan == 0) ? 100 :
                          (totalBytesToScan-bytesLeft)*100.0/totalBytesToScan;
                          
-    buffer.append(String.format("\nTotal Blocks                 : %6d" +
-                                "\nVerified in last hour        : %6d" +
-                                "\nVerified in last day         : %6d" +
-                                "\nVerified in last week        : %6d" +
-                                "\nVerified in last four weeks  : %6d" +
-                                "\nVerified in SCAN_PERIOD      : %6d" +
-                                "\nNot yet verified             : %6d" +
-                                "\nVerified since restart       : %6d" +
-                                "\nScans since restart          : %6d" +
-                                "\nScan errors since restart    : %6d" +
-                                "\nTransient scan errors        : %6d" +
-                                "\nCurrent scan rate limit KBps : %6d" +
-                                "\nProgress this period         : %6.0f%%" +
-                                "\nTime left in cur period      : %6.2f%%" +
-                                "\n", 
+    buffer.append(String.format("%nTotal Blocks                 : %6d" +
+                                "%nVerified in last hour        : %6d" +
+                                "%nVerified in last day         : %6d" +
+                                "%nVerified in last week        : %6d" +
+                                "%nVerified in last four weeks  : %6d" +
+                                "%nVerified in SCAN_PERIOD      : %6d" +
+                                "%nNot yet verified             : %6d" +
+                                "%nVerified since restart       : %6d" +
+                                "%nScans since restart          : %6d" +
+                                "%nScan errors since restart    : %6d" +
+                                "%nTransient scan errors        : %6d" +
+                                "%nCurrent scan rate limit KBps : %6d" +
+                                "%nProgress this period         : %6.0f%%" +
+                                "%nTime left in cur period      : %6.2f%%" +
+                                "%n", 
                                 total, inOneHour, inOneDay, inOneWeek,
                                 inFourWeeks, inScanPeriod, neverScanned,
                                 totalScans, totalScans, 

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

@@ -79,9 +79,6 @@ public class DatanodeJspHelper {
            .getCanonicalHostName();
   }
 
-  private static final SimpleDateFormat lsDateFormat =
-    new SimpleDateFormat("yyyy-MM-dd HH:mm");
-
   /**
    * Get the default chunk size.
    * @param conf the configuration
@@ -205,8 +202,8 @@ public class DatanodeJspHelper {
               + JspHelper.getUrlParam(JspHelper.NAMENODE_ADDRESS, nnAddr);
             cols[0] = "<a href=\"" + datanodeUrl + "\">"
               + HtmlQuoting.quoteHtmlChars(localFileName) + "</a>";
-            cols[5] = lsDateFormat.format(new Date((files[i]
-              .getModificationTime())));
+            cols[5] = new SimpleDateFormat("yyyy-MM-dd HH:mm").format(
+                new Date((files[i].getModificationTime())));
             cols[6] = files[i].getPermission().toString();
             cols[7] = files[i].getOwner();
             cols[8] = files[i].getGroup();

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

@@ -18,6 +18,8 @@
 package org.apache.hadoop.hdfs.server.datanode.fsdataset;
 
 import java.io.Closeable;
+import java.io.FileDescriptor;
+import java.io.FileInputStream;
 import java.io.InputStream;
 
 import org.apache.hadoop.io.IOUtils;
@@ -30,9 +32,9 @@ public class ReplicaInputStreams implements Closeable {
   private final InputStream checksumIn;
 
   /** Create an object with a data input stream and a checksum input stream. */
-  public ReplicaInputStreams(InputStream dataIn, InputStream checksumIn) {
-    this.dataIn = dataIn;
-    this.checksumIn = checksumIn;
+  public ReplicaInputStreams(FileDescriptor dataFd, FileDescriptor checksumFd) {
+    this.dataIn = new FileInputStream(dataFd);
+    this.checksumIn = new FileInputStream(checksumFd);
   }
 
   /** @return the data input stream. */

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

@@ -390,8 +390,7 @@ class FsDatasetImpl implements FsDatasetSpi<FsVolumeImpl> {
     if (ckoff > 0) {
       metaInFile.seek(ckoff);
     }
-    return new ReplicaInputStreams(new FileInputStream(blockInFile.getFD()),
-                                new FileInputStream(metaInFile.getFD()));
+    return new ReplicaInputStreams(blockInFile.getFD(), metaInFile.getFD());
   }
 
   static File moveBlockFiles(Block b, File srcfile, File destdir

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

@@ -4290,6 +4290,8 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
       case SAFEMODE_ENTER: // enter safe mode
         enterSafeMode(false);
         break;
+      default:
+        LOG.error("Unexpected safe mode action");
       }
     }
     return isInSafeMode();

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/protocol/ReceivedDeletedBlockInfo.java

@@ -90,8 +90,8 @@ public class ReceivedDeletedBlockInfo {
     ReceivedDeletedBlockInfo other = (ReceivedDeletedBlockInfo) o;
     return this.block.equals(other.getBlock())
         && this.status == other.status
-        && (this.delHints == other.delHints ||
-            this.delHints != null && this.delHints.equals(other.delHints));
+        && this.delHints != null
+        && this.delHints.equals(other.delHints);
   }
 
   @Override

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/protocol/RemoteEditLog.java

@@ -89,6 +89,9 @@ public class RemoteEditLog implements Comparable<RemoteEditLog> {
     new Function<RemoteEditLog, Long>() {
       @Override
       public Long apply(RemoteEditLog log) {
+        if (null == log) {
+          return HdfsConstants.INVALID_TXID;
+        }
         return log.getStartTxId();
       }
     };

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/JMXGet.java

@@ -63,7 +63,7 @@ import org.apache.hadoop.classification.InterfaceAudience;
 @InterfaceAudience.Private
 public class JMXGet {
 
-  private static final String format = "%s=%s\n";
+  private static final String format = "%s=%s%n";
   private ArrayList<ObjectName> hadoopObjectNames;
   private MBeanServerConnection mbsc;
   private String service = "NameNode", port = "", server = "localhost";
@@ -126,7 +126,8 @@ public class JMXGet {
           continue;
         }
       }
-      err("Info: key = " + key + "; val = "+ val.getClass() +":"+ val);
+      err("Info: key = " + key + "; val = " +
+          (val == null ? "null" : val.getClass()) + ":" + val);
       break;
     }