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Posted to hdfs-issues@hadoop.apache.org by "Brahma Reddy Battula (JIRA)" <ji...@apache.org> on 2017/03/01 10:24:45 UTC
[jira] [Assigned] (HDFS-10714) Issue in handling checksum errors in
write pipeline when fault DN is LAST_IN_PIPELINE
[ https://issues.apache.org/jira/browse/HDFS-10714?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Brahma Reddy Battula reassigned HDFS-10714:
-------------------------------------------
Assignee: Vinayakumar B (was: Brahma Reddy Battula)
> Issue in handling checksum errors in write pipeline when fault DN is LAST_IN_PIPELINE
> -------------------------------------------------------------------------------------
>
> Key: HDFS-10714
> URL: https://issues.apache.org/jira/browse/HDFS-10714
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Brahma Reddy Battula
> Assignee: Vinayakumar B
> Attachments: HDFS-10714-01-draft.patch
>
>
> We had come across one issue, where write is failed even 7 DN’s are available due to network fault at one datanode which is LAST_IN_PIPELINE. It will be similar to HDFS-6937 .
> Scenario : (DN3 has N/W Fault and Min repl=2).
> Write pipeline:
> DN1->DN2->DN3 => DN3 Gives ERROR_CHECKSUM ack. And so DN2 marked as bad
> DN1->DN4-> DN3 => DN3 Gives ERROR_CHECKSUM ack. And so DN4 is marked as bad
> ….
> And so on ( all the times DN3 is LAST_IN_PIPELINE) ... Continued till no more datanodes to construct the pipeline.
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