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From "Koji Noguchi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-4696) Better handling of dfsadmin command when namenode is slow
Date Thu, 20 Nov 2008 19:00:44 GMT
Better handling of dfsadmin command when namenode is slow
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                 Key: HADOOP-4696
                 URL: https://issues.apache.org/jira/browse/HADOOP-4696
             Project: Hadoop Core
          Issue Type: New Feature
          Components: dfs
    Affects Versions: 0.18.2
            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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