[HDFS-3157] Error in deleting block is keep on coming from DN even after the block report and directory scanning has happened

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.23.0, 2.0.0-alpha
• Fix Version/s: 2.0.2-alpha
• Component/s: namenode
• Target Version/s: 2.0.0-alpha
• Hadoop Flags: Reviewed
• Assignee: Ashish Singhi
• Reporter: J.Andreina
• Created: 28/Mar/12 14:35
• Updated: 10/Mar/15 04:36
• Resolved: 02/Jul/12 07:40

Description

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
-------------------------------------------------------------------------------------

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.

From the datanode side in which the block is deleted the following exception occured

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)

Issue Links

• is related to: HDFS-3391 TestPipelinesFailover#testLeaseRecoveryAfterFailover is failing