Backport of HDFS-3611 from trunk. svn merge -c 1360001 ../../trunk (harsh)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1360002 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -121,6 +121,8 @@ Release 2.0.1-alpha - UNRELEASED
     HDFS-3613. GSet prints some INFO level values, which aren't
     really very useful to all (Andrew Wang via harsh)
 
+    HDFS-3611. NameNode prints unnecessary WARNs about edit log normally skipping a few bytes. (Colin Patrick McCabe via harsh)
+
   OPTIMIZATIONS
 
     HDFS-2982. Startup performance suffers when there are many edit log

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

@@ -164,9 +164,11 @@ public class EditLogFileInputStream extends EditLogInputStream {
           //
           long skipAmt = file.length() - tracker.getPos();
           if (skipAmt > 0) {
-            LOG.warn("skipping " + skipAmt + " bytes at the end " +
-              "of edit log  '" + getName() + "': reached txid " + txId +
-              " out of " + lastTxId);
+            if (LOG.isDebugEnabled()) {
+                LOG.debug("skipping " + skipAmt + " bytes at the end " +
+                  "of edit log  '" + getName() + "': reached txid " + txId +
+                  " out of " + lastTxId);
+            }
             tracker.clearLimit();
             IOUtils.skipFully(tracker, skipAmt);
           }