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From "Yongjun Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7916) 'reportBadBlocks' from datanodes to standby Node BPServiceActor goes for infinite loop
Date Mon, 12 Oct 2015 18:05:05 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7916?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14953493#comment-14953493

Yongjun Zhang commented on HDFS-7916:

Hi [~shahrs87] and [~vinayrpet],

Thanks for your earlier work on this.

I saw that the latest patch does handle ErrorReportAction the same way but there was a comment

Vinayakumar B added a comment - 01/Apr/15 15:03
Yes. Rushabh S Shah is right. I had already checked about this. ErrorReportAction doesn't
need to be handled.

This is related to [~hitliuyi]'s comment (thanks Yi). It seems reasonable to handle both,
but because of the above comment, I have a question, did we discover something new such that
we made the the change in ErrorReportAction?
At least this seems to be a discrepancy between the comments and the patch. Thanks.

> 'reportBadBlocks' from datanodes to standby Node BPServiceActor goes for infinite loop
> --------------------------------------------------------------------------------------
>                 Key: HDFS-7916
>                 URL: https://issues.apache.org/jira/browse/HDFS-7916
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>    Affects Versions: 2.7.0
>            Reporter: Vinayakumar B
>            Assignee: Rushabh S Shah
>            Priority: Critical
>             Fix For: 2.7.1
>         Attachments: HDFS-7916-01.patch, HDFS-7916-1.patch
> if any badblock found, then BPSA for StandbyNode will go for infinite times to report
> {noformat}2015-03-11 19:43:41,528 WARN org.apache.hadoop.hdfs.server.datanode.DataNode:
Failed to report bad block BP-1384821822-
to namenode: stobdtserver3/
> org.apache.hadoop.hdfs.server.datanode.BPServiceActorActionException: Failed to report
bad block BP-1384821822- to namenode:
>         at org.apache.hadoop.hdfs.server.datanode.ReportBadBlockAction.reportTo(ReportBadBlockAction.java:63)
>         at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.processQueueMessages(BPServiceActor.java:1020)
>         at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.offerService(BPServiceActor.java:762)
>         at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:856)
>         at java.lang.Thread.run(Thread.java:745)
> {noformat}

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