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https://issues.apache.org/jira/browse/HDFS-9598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15122915#comment-15122915
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Colin Patrick McCabe commented on HDFS-9598:
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It seems like at least the first time this happens, there should be some kind
of error message at a level higher than DEBUG. I also wonder if this happening
is a sign that there is a bad configuration (i.e. misconfigured heap size). Do
we really want this fallback in every case?
> Use heap buffer in PacketReceiver If hdfs client has no enough free direct
> buffer.
> ----------------------------------------------------------------------------------
>
> Key: HDFS-9598
> URL: https://issues.apache.org/jira/browse/HDFS-9598
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Yong Zhang
> Assignee: Yong Zhang
> Attachments: HDFS-9598.001.patch, HDFS-9598.002.patch
>
>
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