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https://issues.apache.org/jira/browse/HADOOP-1065?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12478494
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dhruba borthakur commented on HADOOP-1065:
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The namenode currently exposes a RPC called reportBadBlock() that allows a
client to report blocks that have bad crc. The namenode silently deletes those
bad blocks. Oops!
In the current implementation, the client does not report failed read/write
retry attempts to the namenode. It should.
> DFS client warnings / info's should be centrally logged by name node
> --------------------------------------------------------------------
>
> Key: HADOOP-1065
> URL: https://issues.apache.org/jira/browse/HADOOP-1065
> Project: Hadoop
> Issue Type: Improvement
> Reporter: eric baldeschwieler
>
> When a client encounters an error condition that it warns / infos the user
> about, we should log that centrally, so that we can mine this info later.
> For example CRC errors or block write retries.
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