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https://issues.apache.org/jira/browse/HDFS-1112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12861542#action_12861542
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Todd Lipcon commented on HDFS-1112:
-----------------------------------
We need to be a little bit careful of this, since we've made assumptions in
some places that logSync() won't be called while the NN is in safe mode.
Dhruba, do you have an opinion on this? I know the contracts regarding safemode
are important for your HA work.
> Edit log buffer should not grow unboundedly
> -------------------------------------------
>
> Key: HDFS-1112
> URL: https://issues.apache.org/jira/browse/HDFS-1112
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.22.0
> Reporter: Hairong Kuang
> Fix For: 0.22.0
>
>
> Currently HDFS does not impose an upper limit on the edit log buffer. In case
> there are a large number of open operations coming in with access time update
> on, since open does not call sync automatically, there is a possibility that
> the buffer grow to a large size, therefore causes memory leak and full GC in
> extreme cases as described in HDFS-1104.
> The edit log buffer should be automatically flushed when the buffer becomes
> full.
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