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https://issues.apache.org/jira/browse/HDFS-11155?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Wei-Chiu Chuang updated HDFS-11155:
-----------------------------------
Description:
HDFS-10512 fixed a race condition that caused VolumeScanner to terminate
abruptly when a corrupt replica, which is being updated, is detected. However,
when such a corrupt replica is detected, VolumeScanner still reports the old
replica generation stamp to the NN. NN then directs DN to remove the older
replica. Because the generation stamp is updated, DN can not find it, so
corrupt replica remains corrupt.
NN's log shows something similar to the following:
{quote}
2016-11-17 21:08:05,350 INFO BlockStateChange: BLOCK
NameSystem.addToCorruptReplicasMap: blk_1077571736 added as corrupt on
192.168.168.58:50010 by /192.168.168.58 because client machine reported it
2016-11-17 21:08:05,350 INFO BlockStateChange: BLOCK* invalidateBlock:
blk_1077571736_3991953(stored=blk_1077571736_3992018) on 192.168.168.58:50010
{quote}
The DN's log has these:
{noformat}
2016-11-17 21:08:04,815 INFO
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Appending
to FinalizedReplica, blk_1077571736_3991953, FINALIZED
getNumBytes() = 39061752
getBytesOnDisk() = 39061752
getVisibleLength()= 39061752
getVolume() = /data/3/dfs/dn/current
getBlockFile() =
/data/3/dfs/dn/current/BP-1092022411-192.168.168.55-1474407949037/current/finalized/subdir58/subdir112/blk_1077571736
2016-11-17 21:08:09,158 INFO
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Failed to
delete replica blk_1077571736_3991953: ReplicaInfo not found.
{noformat}
was:
HDFS-10512 fixed a race condition that caused VolumeScanner to terminate
abruptly when a corrupt replica is detected. However, when a corrupt replica is
detected, VolumeScanner still reports the old replica generation stamp to the
NN. NN then directs DN to remove the older replica, but because the generation
stamp is updated, DN can not find it, so corrupt replica remains corrupt.
NN's log shows something similar to the following:
{quote}
2016-11-17 21:08:05,350 INFO BlockStateChange: BLOCK
NameSystem.addToCorruptReplicasMap: blk_1077571736 added as corrupt on
192.168.168.58:50010 by /192.168.168.58 because client machine reported it
2016-11-17 21:08:05,350 INFO BlockStateChange: BLOCK* invalidateBlock:
blk_1077571736_3991953(stored=blk_1077571736_3992018) on 192.168.168.58:50010
{quote}
The DN's log has these:
{noformat}
2016-11-17 21:08:04,815 INFO
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Appending
to FinalizedReplica, blk_1077571736_3991953, FINALIZED
getNumBytes() = 39061752
getBytesOnDisk() = 39061752
getVisibleLength()= 39061752
getVolume() = /data/3/dfs/dn/current
getBlockFile() =
/data/3/dfs/dn/current/BP-1092022411-192.168.168.55-1474407949037/current/finalized/subdir58/subdir112/blk_1077571736
2016-11-17 21:08:09,158 INFO
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Failed to
delete replica blk_1077571736_3991953: ReplicaInfo not found.
{noformat}
> VolumeScanner should report the latest generation stamp of a bad replica
> ------------------------------------------------------------------------
>
> Key: HDFS-11155
> URL: https://issues.apache.org/jira/browse/HDFS-11155
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Affects Versions: 2.7.4
> Environment: CDH5.7.3
> Reporter: Wei-Chiu Chuang
> Assignee: Wei-Chiu Chuang
>
> HDFS-10512 fixed a race condition that caused VolumeScanner to terminate
> abruptly when a corrupt replica, which is being updated, is detected.
> However, when such a corrupt replica is detected, VolumeScanner still reports
> the old replica generation stamp to the NN. NN then directs DN to remove the
> older replica. Because the generation stamp is updated, DN can not find it,
> so corrupt replica remains corrupt.
> NN's log shows something similar to the following:
> {quote}
> 2016-11-17 21:08:05,350 INFO BlockStateChange: BLOCK
> NameSystem.addToCorruptReplicasMap: blk_1077571736 added as corrupt on
> 192.168.168.58:50010 by /192.168.168.58 because client machine reported it
> 2016-11-17 21:08:05,350 INFO BlockStateChange: BLOCK* invalidateBlock:
> blk_1077571736_3991953(stored=blk_1077571736_3992018) on 192.168.168.58:50010
> {quote}
> The DN's log has these:
> {noformat}
> 2016-11-17 21:08:04,815 INFO
> org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl:
> Appending to FinalizedReplica, blk_1077571736_3991953, FINALIZED
> getNumBytes() = 39061752
> getBytesOnDisk() = 39061752
> getVisibleLength()= 39061752
> getVolume() = /data/3/dfs/dn/current
> getBlockFile() =
> /data/3/dfs/dn/current/BP-1092022411-192.168.168.55-1474407949037/current/finalized/subdir58/subdir112/blk_1077571736
> 2016-11-17 21:08:09,158 INFO
> org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Failed
> to delete replica blk_1077571736_3991953: ReplicaInfo not found.
> {noformat}
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