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From "Hu Liu, (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-7284) Add more debug info to BlockInfoUnderConstruction#setGenerationStampAndVerifyReplicas
Date Fri, 24 Oct 2014 06:52:33 GMT
Hu Liu, created HDFS-7284:
-----------------------------

             Summary: Add more debug info to BlockInfoUnderConstruction#setGenerationStampAndVerifyReplicas
                 Key: HDFS-7284
                 URL: https://issues.apache.org/jira/browse/HDFS-7284
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: namenode
    Affects Versions: 2.5.1
            Reporter: Hu Liu,


When I was looking at some replica loss issue, I got the following info from log
{code}
2014-10-13 01:54:53,104 INFO BlockStateChange: BLOCK* Removing stale replica from location
x.x.x.x
{code}
I could just know that a replica is removed, but I don't know which block and its timestamp.
I need to know the id and timestamp of the block from the log file.
So it's better to add more info including block id and timestamp to the code snippet
{code}
    for (ReplicaUnderConstruction r : replicas) {
      if (genStamp != r.getGenerationStamp()) {
        r.getExpectedLocation().removeBlock(this);
        NameNode.blockStateChangeLog.info("BLOCK* Removing stale replica "
            + "from location: " + r.getExpectedLocation());
      }
    }
{code}



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