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Jesse,

On 2/1/2010 5:22 AM, Jesse Klaasse wrote:
> 
> In the meantime, the environment has been much more stable than it was before
> the move to Java 6 and the new JVM options. However, a few minutes ago,
> Tomcat became completely unresponsive, while the CPU usage was very low
> (~3%). This was on our external server, with these options:
> 
> -Djavax.sql.DataSource.Factory=org.apache.commons.dbcp.BasicDataSourceFactory
> -Dcom.sun.management.jmxremote -XX:MaxPermSize=512m
> -Xloggc:D:\logs\gc\tomcat-gc.log -XX:+PrintGCDetails -XX:+UseConcMarkSweepGC
> -XX:+CMSClassUnloadingEnabled -XX:+DisableExplicitGC -XX:NewSize=3072m
> -XX:+UseCompressedOops -Xms7168m -Xmx7168m
> 
> The gc log is showing a lot of activity during the unresponsiveness (the gc
> log is attached to this message). Do you guys see any clues? Thanks in
> advance!

Can you give us a timestamp for when the trouble started? Reading GC
output is pretty tedious.

Also, what happens if you remove all your *GC* options (other than
logging) from your JAVA_OPTS?

Is this reproducible?

- -chris
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