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https://issues.apache.org/jira/browse/HDFS-9373?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhe Zhang updated HDFS-9373:
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Summary: Erasure coding: friendly log information for write operations with
some failed streamers (was: Show friendly information to user when client
succeeds the writing with some failed streamers)
> Erasure coding: friendly log information for write operations with some
> failed streamers
> ----------------------------------------------------------------------------------------
>
> Key: HDFS-9373
> URL: https://issues.apache.org/jira/browse/HDFS-9373
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: erasure-coding
> Affects Versions: 3.0.0
> Reporter: Li Bo
> Assignee: Li Bo
> Attachments: HDFS-9373-001.patch, HDFS-9373-002.patch,
> HDFS-9373-003.patch
>
>
> When not more than PARITY_NUM streamers fail for a block group, the client
> may still succeed to write the data. But several exceptions are thrown to
> user and user has to check the reasons. The friendly way is just inform user
> that some streamers fail when writing a block group. It’s not necessary to
> show the details of exceptions because a small number of stream failures is
> not vital to the client writing.
> When only DATA_NUM streamers succeed, the block group is in a high risk
> because the corrupt of any block will cause all the six blocks' data lost. We
> should give obvious warning to user when this occurs.
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