Error in deleting block is keep on coming from DN even after the block report
and directory scanning has happened
-----------------------------------------------------------------------------------------------------------------
Key: HDFS-3157
URL: https://issues.apache.org/jira/browse/HDFS-3157
Project: Hadoop HDFS
Issue Type: Bug
Components: name-node
Affects Versions: 0.23.0, 0.24.0
Reporter: J.Andreina
Fix For: 0.24.0
Cluster setup:
1NN,Three DN(DN1,DN2,DN3),replication factor-2,"dfs.blockreport.intervalMsec"
300,"dfs.datanode.directoryscan.interval" 1
step 1: write one file "a.txt" with sync(not closed)
step 2: Delete the blocks in one of the datanode say DN1(from rbw) to which
replication happened.
step 3: close the file.
Since the replication factor is 2 the blocks are replicated to the other
datanode.
Then at the NN side the following cmd is issued to DN from which the block is
deleted
-------------------------------------------------------------------------------------
{noformat}
2012-03-19 13:41:36,905 INFO org.apache.hadoop.hdfs.StateChange: BLOCK
NameSystem.addToCorruptReplicasMap: duplicate requested for
blk_2903555284838653156 to add as corrupt on XX.XX.XX.XX by /XX.XX.XX.XX
because reported RBW replica with genstamp 1002 does not match COMPLETE block's
genstamp in block map 1003
2012-03-19 13:41:39,588 INFO org.apache.hadoop.hdfs.StateChange: BLOCK*
Removing block blk_2903555284838653156_1003 from neededReplications as it has
enough replicas.
{noformat}
>From the datanode side in which the block is deleted the following exception
>occured
{noformat}
2012-02-29 13:54:13,126 WARN org.apache.hadoop.hdfs.server.datanode.DataNode:
Unexpected error trying to delete block blk_2903555284838653156_1003. BlockInfo
not found in volumeMap.
2012-02-29 13:54:13,126 WARN org.apache.hadoop.hdfs.server.datanode.DataNode:
Error processing datanode Command
java.io.IOException: Error in deleting blocks.
at
org.apache.hadoop.hdfs.server.datanode.FSDataset.invalidate(FSDataset.java:2061)
at
org.apache.hadoop.hdfs.server.datanode.BPOfferService.processCommandFromActive(BPOfferService.java:581)
at
org.apache.hadoop.hdfs.server.datanode.BPOfferService.processCommandFromActor(BPOfferService.java:545)
at
org.apache.hadoop.hdfs.server.datanode.BPServiceActor.processCommand(BPServiceActor.java:690)
at
org.apache.hadoop.hdfs.server.datanode.BPServiceActor.offerService(BPServiceActor.java:522)
at
org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:662)
at java.lang.Thread.run(Thread.java:619)
{noformat}
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