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https://issues.apache.org/jira/browse/HDFS-237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Harsh J resolved HDFS-237.
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Resolution: Later
This older JIRA is a bit stale given the multiple changes that went into the
RPC side. Follow HADOOP-9640 and related JIRAs instead for more recent work.
bq. a separate rpc queue
This is supported today via the servicerpc-address configs (typically set to
8022, and strongly recommended for HA modes).
> Better handling of dfsadmin command when namenode is slow
> ---------------------------------------------------------
>
> Key: HDFS-237
> URL: https://issues.apache.org/jira/browse/HDFS-237
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: Koji Noguchi
>
> Probably when hitting HADOOP-3810, Namenode became unresponsive. Large time
> spent in GC.
> All dfs/dfsadmin command were timing out.
> WebUI was coming up after waiting for a long time.
> Maybe setting a long timeout would have made the dfsadmin command go through.
> But it would be nice to have a separate queue/handler which doesn't compete
> with regular rpc calls.
> All I wanted to do was dfsadmin -safemode enter, dfsadmin -finalizeUpgrade ...
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