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https://issues.apache.org/jira/browse/ACCUMULO-1408?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13674531#comment-13674531
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Eric Newton commented on ACCUMULO-1408:
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It has been seen again, but it is not readily reproducible.
I'm thinking that we are getting client service starvation: requests are timing
out before getting serviced, so they are retried, which makes the situation
worse.
> unresponsive !METADATA table seen on a very large cluster
> ---------------------------------------------------------
>
> Key: ACCUMULO-1408
> URL: https://issues.apache.org/jira/browse/ACCUMULO-1408
> Project: Accumulo
> Issue Type: Bug
> Components: tserver
> Affects Versions: 1.4.3
> Environment: large cluster
> Reporter: Eric Newton
> Assignee: Eric Newton
>
> On a large cluster, saw an unresponsive !METADATA table; this resulted in
> hundreds of simultaneous scans of the root tablet. tservers did not look
> busy. They had lots of data available on their recv network queues, and
> nothing out their output queues. Most of these recv buffers did not change
> over time. After killing these unresponsive servers the system recovered.
> HDFS was about 80% full.
> accumulo was running over CDH3u5.
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