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From "Todd Lipcon (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-2553) BlockPoolSliceScanner spinning in loop
Date Mon, 14 Nov 2011 23:13:52 GMT
BlockPoolSliceScanner spinning in loop
--------------------------------------

                 Key: HDFS-2553
                 URL: https://issues.apache.org/jira/browse/HDFS-2553
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: data-node
    Affects Versions: 0.23.0, 0.24.0
            Reporter: Todd Lipcon
            Priority: Critical


Playing with trunk, I managed to get a DataNode in a situation where the BlockPoolSliceScanner
is spinning in the following loop, using 100% CPU:
        at org.apache.hadoop.hdfs.server.datanode.DataNode$BPOfferService.isAlive(DataNode.java:820)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.isBPServiceAlive(DataNode.java:2962)
        at org.apache.hadoop.hdfs.server.datanode.BlockPoolSliceScanner.scan(BlockPoolSliceScanner.java:625)
        at org.apache.hadoop.hdfs.server.datanode.BlockPoolSliceScanner.scanBlockPoolSlice(BlockPoolSliceScanner.java:614)
        at org.apache.hadoop.hdfs.server.datanode.DataBlockScanner.run(DataBlockScanner.java:95)


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