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https://issues.apache.org/jira/browse/ACCUMULO-4536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Miller updated ACCUMULO-4536:
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Affects Version/s: 1.7.2
1.8.0
> Infinite loop creating empty WAL files when disk space is low
> -------------------------------------------------------------
>
> Key: ACCUMULO-4536
> URL: https://issues.apache.org/jira/browse/ACCUMULO-4536
> Project: Accumulo
> Issue Type: Bug
> Components: tserver
> Affects Versions: 1.6.6, 1.7.2, 1.8.0
> Reporter: Christopher Tubbs
> Priority: Minor
>
> Saw this on 1.6.6 with a small disk for testing (32GB disk). The default
> walog size is around 1GB, and only 3.4GB were left available on each data
> node.
> The namenode reported that no data nodes had space available when trying to
> write the first block, so the tserver failed to write the file. It kept
> retrying, resulting in the namenode filling up with thousands of zero-length
> WAL files.
> The fix was to lower the {{tserver.walog.max.size}} to {{100M}}. Another
> solution would be to use a larger disk.
> The infinite loop problem, constantly creating new empty WAL files is still a
> problem, but it should only happen when low on disk space, which is likely
> going to cause other, more serious problems... and could be avoided with good
> system monitoring.
> I have not tested on versions newer than 1.6.6, but I imagine it's still a
> problem.
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