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From "Brian Bockelman (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-4482) Hadoop JMX usage makes Nagios monitoring impossible
Date Tue, 21 Oct 2008 20:38:44 GMT
Hadoop JMX usage makes Nagios monitoring impossible

                 Key: HADOOP-4482
                 URL: https://issues.apache.org/jira/browse/HADOOP-4482
             Project: Hadoop Core
          Issue Type: Improvement
          Components: metrics
    Affects Versions: 0.18.1
            Reporter: Brian Bockelman
             Fix For: 0.19.1

When Hadoop reports Datanode information to JMX, the bean uses the name "DataNode-" + storageid.
 The storage ID incorporates a random number and is unpredictable.

This prevents me from monitoring DFS datanodes through Hadoop using the JMX interface; in
order to do that, you must be able to specify the bean name on the command line.

The fix is simple, patch will be coming momentarily.  However, there was probably a reason
for making the datanodes all unique names which I'm unaware of, so it'd be nice to hear from
the metrics maintainer.

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