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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-5710) FSDirectory#getFullPathName should check for inodes against null
Date Wed, 01 Jan 2014 04:07:50 GMT
Ted Yu created HDFS-5710:
----------------------------

             Summary: FSDirectory#getFullPathName should check for inodes against null
                 Key: HDFS-5710
                 URL: https://issues.apache.org/jira/browse/HDFS-5710
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 2.2.0
            Reporter: Ted Yu


>From https://builds.apache.org/job/hbase-0.96-hadoop2/166/testReport/junit/org.apache.hadoop.hbase.mapreduce/TestTableInputFormatScan1/org_apache_hadoop_hbase_mapreduce_TestTableInputFormatScan1/
:
{code}
2014-01-01 00:10:15,571 INFO  [IPC Server handler 2 on 50198] blockmanagement.BlockManager(1009):
BLOCK* addToInvalidates: blk_1073741967_1143 127.0.0.1:40188 127.0.0.1:46149 127.0.0.1:41496

2014-01-01 00:10:16,559 WARN  [org.apache.hadoop.hdfs.server.blockmanagement.BlockManager$ReplicationMonitor@93935b]
namenode.FSDirectory(1854): Could not get full path. Corresponding file might have deleted
already.
2014-01-01 00:10:16,560 FATAL [org.apache.hadoop.hdfs.server.blockmanagement.BlockManager$ReplicationMonitor@93935b]
blockmanagement.BlockManager$ReplicationMonitor(3127): ReplicationMonitor thread received
Runtime exception. 
java.lang.NullPointerException
	at org.apache.hadoop.hdfs.server.namenode.FSDirectory.getFullPathName(FSDirectory.java:1871)
	at org.apache.hadoop.hdfs.server.namenode.INode.getFullPathName(INode.java:482)
	at org.apache.hadoop.hdfs.server.namenode.INodeFile.getName(INodeFile.java:316)
	at org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy.chooseTarget(BlockPlacementPolicy.java:118)
	at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.computeReplicationWorkForBlocks(BlockManager.java:1259)
	at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.computeReplicationWork(BlockManager.java:1167)
	at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.computeDatanodeWork(BlockManager.java:3158)
	at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager$ReplicationMonitor.run(BlockManager.java:3112)
	at java.lang.Thread.run(Thread.java:724)
{code}
Looks like getRelativePathINodes() returned null but getFullPathName() didn't check inodes
against null, leading to NPE.



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