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Posted to common-dev@hadoop.apache.org by "Koji Noguchi (JIRA)" <ji...@apache.org> on 2008/11/20 20:00:44 UTC
[jira] Created: (HADOOP-4696) Better handling of dfsadmin command
when namenode is slow
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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[jira] Commented: (HADOOP-4696) Better handling of dfsadmin command
when namenode is slow
Posted by "Raghu Angadi (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-4696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12649450#action_12649450 ]
Raghu Angadi commented on HADOOP-4696:
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This is mainly for emergencies. Simpler thing might be for NN to provide webui for these commands so that it bypasses RPC traffic.
> Better handling of dfsadmin command when namenode is slow
> ---------------------------------------------------------
>
> 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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