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https://issues.apache.org/jira/browse/HDFS-927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12828326#action_12828326
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Todd Lipcon commented on HDFS-927:
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bq. on a 3 block file, if we hiccupped the first read on each block,
This would only be the case if you spanned all three blocks with a single
read() op. Not likely to happen unless you're calling read() once with a 200MB
buffer or something :)
> DFSInputStream retries too many times for new block locations
> -------------------------------------------------------------
>
> Key: HDFS-927
> URL: https://issues.apache.org/jira/browse/HDFS-927
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs client
> Affects Versions: 0.21.0, 0.22.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Attachments: hdfs-927.txt
>
>
> I think this is a regression caused by HDFS-127 -- DFSInputStream is supposed
> to only go back to the NN max.block.acquires times, but in trunk it goes back
> twice as many - the default is 3, but I am counting 7 calls to
> getBlockLocations before an exception is thrown.
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