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From Rene Kochen <>
Subject RE: MemoryMeter uninitialized (jamm not specified as java agent)
Date Mon, 20 Jun 2011 16:26:38 GMT
Thanks, the java agent option is missing in the Cassandra.bat file

From: aaron morton []
Sent: zondag 19 juni 2011 21:33
Subject: Re: MemoryMeter uninitialized (jamm not specified as java agent)

What do you get for

$ java -version
java version "1.6.0_24"
Java(TM) SE Runtime Environment (build 1.6.0_24-b07-334-10M3326)
Java HotSpot(TM) 64-Bit Server VM (build 19.1-b02-334, mixed mode)

Also you can check if the wrapper has correctly detected things with

ps aux | grep javaagent

The args to the java process should include -javaagent:bin/../lib/jamm-0.2.2.jar


Aaron Morton
Freelance Cassandra Developer

On 17 Jun 2011, at 22:18, Rene Kochen wrote:

Since using cassandra 0.8, I see the following warning:

WARN 12:05:59,807 MemoryMeter uninitialized (jamm not specified as java agent); assuming liveRatio
of 10.0.  Usually this means disabled jamm because you are using a buggy
JRE; upgrade to the Sun JRE instead

I'am using Sun JRE.

What can I do to resolve this? What are the consequences of this warning?



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