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https://issues.apache.org/jira/browse/HDFS-5346?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kihwal Lee updated HDFS-5346:
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Description: When initial block reports are being processed, checkMode() is
called from incrementSafeBlockCount(). This causes the replication queues to be
initialized in the middle of processing a block report in the IBR processing
mode. If there are many block reports waiting to be processed, SafeModeMonitor
won't be able to make name node leave the safe mode soon. It appears that the
block report processing speed degrades considerably during this time.
> Replication queues should not be initialized in the middle of IBR processing.
> -----------------------------------------------------------------------------
>
> Key: HDFS-5346
> URL: https://issues.apache.org/jira/browse/HDFS-5346
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 0.23.9, 2.3.0
> Reporter: Kihwal Lee
>
> When initial block reports are being processed, checkMode() is called from
> incrementSafeBlockCount(). This causes the replication queues to be
> initialized in the middle of processing a block report in the IBR processing
> mode. If there are many block reports waiting to be processed,
> SafeModeMonitor won't be able to make name node leave the safe mode soon. It
> appears that the block report processing speed degrades considerably during
> this time.
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