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https://issues.apache.org/jira/browse/HDFS-864?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12796353#action_12796353
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Todd Lipcon commented on HDFS-864:
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Yea, from what I read on that wiki page you wrote, JSure sounds like it would
help with this. I found these deadlocks using jcarder, which works at runtime
to detect lock order inversions with a bit of overhead. I had to make a few
changes to jcarder ( http://github.com/toddlipcon/jcarder/tree/cloudera ) but
at this point it's very effective for this and doesn't require any extra
development effort. Once those changes get incorporated into a jcarder release,
I hope to get it integrated into the Hudson test-patch.
> Potential deadlock rolling edit logs
> ------------------------------------
>
> Key: HDFS-864
> URL: https://issues.apache.org/jira/browse/HDFS-864
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
> Attachments: cycle.png
>
>
> FSEditLog.rollEditLog locks the log, then the FSImage. FSImage.close locks
> the image, then the log.
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