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https://issues.apache.org/jira/browse/HDFS-1457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12928736#action_12928736
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Ramkumar Vadali commented on HDFS-1457:
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@Hairong, I see a lot of release audit warnings in a clean MR checkout too. I
think this is due to HADOOP-7008. Please see MAPREDUCE-2172 for this.
> Limit transmission rate when transfering image between primary and secondary
> NNs
> --------------------------------------------------------------------------------
>
> Key: HDFS-1457
> URL: https://issues.apache.org/jira/browse/HDFS-1457
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.22.0
> Reporter: Hairong Kuang
> Assignee: Hairong Kuang
> Fix For: 0.22.0
>
> Attachments: checkpoint-limitandcompress.patch,
> trunkThrottleImage.patch, trunkThrottleImage1.patch
>
>
> If the fsimage is very big. The network is full in a short time when
> SeconaryNamenode do checkpoint, leading to Jobtracker access Namenode to get
> relevant file data to fail in job initialization phase. So we limit
> transmission speed and compress transmission to resolve the problem.
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