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https://issues.apache.org/jira/browse/HDFS-6956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14143611#comment-14143611
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stack commented on HDFS-6956:
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Patch looks great to me. +1. I like focused tool for trace admin. Failures
don't look related. How about findbugs warnings? Didn't try it. Will copy
this model into hbase. We need to be able to do dynamic on/off of receivers too.
nit: 'be speciifed '
> Allow dynamically changing the tracing level in Hadoop servers
> --------------------------------------------------------------
>
> Key: HDFS-6956
> URL: https://issues.apache.org/jira/browse/HDFS-6956
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, namenode
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Attachments: HDFS-6956.002.patch
>
>
> We should allow users to dynamically change the tracing level in Hadoop
> servers. The easiest way to do this is probably to have an RPC accessible
> only to the superuser that changes tracing settings. This would allow us to
> turn on and off tracing on the NameNode, DataNode, etc. at runtime.
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