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From "Sam Tunnicliffe (JIRA)" <>
Subject [jira] [Created] (CASSANDRA-6404) Tools emit ERRORs and WARNINGs about missing javaagent
Date Mon, 25 Nov 2013 15:35:36 GMT
Sam Tunnicliffe created CASSANDRA-6404:

             Summary: Tools emit ERRORs and WARNINGs about missing javaagent 
                 Key: CASSANDRA-6404
             Project: Cassandra
          Issue Type: Improvement
          Components: Tools
            Reporter: Sam Tunnicliffe
            Priority: Minor
             Fix For: 2.0.3, 1.2.12
         Attachments: 0001-Set-javaagent-when-running-tools-in-bin.patch

The combination of CASSANDRA-6107 & CASSANDRA-6293 has lead to a number of the tools shipped
in bin/ to display the following warnings when run:

ERROR 15:21:47,337 Unable to initialize MemoryMeter (jamm not specified as javaagent).  This
means Cassandra will be unable to measure object sizes accurately and may consequently OOM.
 WARN 15:21:47,506 MemoryMeter uninitialized (jamm not specified as java agent); KeyCache
size in JVM Heap will not be calculated accurately. Usually this means disabled
jamm because you are u

Although harmless, these are a bit disconcerting. The simplest fix seems to be to set the
javaagent switch as we do for the main C* launch.

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