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https://issues.apache.org/jira/browse/HDFS-13840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16602918#comment-16602918
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Surendra Singh Lilhore commented on HDFS-13840:
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Thanks [~brahmareddy] for patch.
Some review comment.
1. In {{checkReplicaCorrupt()}}, {{isStriped()}} block check it is not
required. EC file also handle gstamp same as continues file.
{code}
+ if (!storedBlock.isStriped()
+ && storedBlock.getGenerationStamp() > reported
+ .getGenerationStamp()) {
+ return new BlockToMarkCorrupt(new Block(reported), storedBlock,
+ reportedGS,
{code}
2. Why the below change is required ?, if block is marked as corrupted and it
is corrupted during write then it will marked as invalid.
{code}
+ if (ucBlock.reportedState == ReplicaState.FINALIZED && (
+ block.findStorageInfo(storageInfo) < 0) || corruptReplicas
+ .isReplicaCorrupt(block, storageInfo.getDatanodeDescriptor())) {
{code}
> RBW Blocks which are having less GS should be added to Corrupt
> --------------------------------------------------------------
>
> Key: HDFS-13840
> URL: https://issues.apache.org/jira/browse/HDFS-13840
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Brahma Reddy Battula
> Assignee: Brahma Reddy Battula
> Priority: Minor
> Attachments: HDFS-13840-002.patch, HDFS-13840-003.patch,
> HDFS-13840-004.patch, HDFS-13840.patch
>
>
> # Start two DN's (DN1,DN2).
> # Write fileA with rep=2 ( dn't close)
> # Stop DN1.
> # Write some data to fileA.
> # restart the DN1
> # Get the blocklocations of fileA.
> Here RWR state block will be reported on DN restart and added to locations.
> IMO,RWR blocks which having less GS shouldn't added, as they give false
> postive (anyway read can be failed as it's genstamp is less)
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