What does "DestroyJavaVM" ... waiting on condition " in thread dumpmean ?

[krislioe]

Hi all,

We have web application ruuning in OC4J application server, on peak
load we see CPU itilization is 99.9 % and when do kill the java
process and see the thread dump, there is this message :

"DestroyJavaVM" prio=1 tid=0x0000002ba444a4e0 nid=0x7e58 waiting on
condition [0
x0000000000000000..0x0000007fbfffd2d0]

The question is :

My question is :
What does the message mean ?
Is that mean full GC is happening and to big heap to free ?
Is this part of garbage collection process ?

Fyi, we set the heap size for the JVM 3GB. The server physical memory
is 12GB.

Thank you very much,
xtanto

 

[John B. Matthews]

We have web application ruuning in OC4J application server, on peak
load we see CPU itilization is 99.9 % and when do kill the java
process and see the thread dump, there is this message :

"DestroyJavaVM" prio=1 tid=0x0000002ba444a4e0 nid=0x7e58 waiting on
condition [0x0000000000000000..0x0000007fbfffd2d0]

[...] What does the message mean?

DestroyJavaVM is a thread that unloads[1] the Java VM on program
exit[2]. As your program did not exit[2], the thread was still
executing at the time the thread dump was created..

Is that mean full GC is happening and to[o] big heap to free?

That might have caused the high utilization, but it is otherwise
unrelated to the remaining DestroyJavaVM thread.

Is this part of garbage collection process?

No.

[...]

[1]<http://java.sun.com/javase/6/docs/technotes/guides/jni/spec/invocation.html>
[2]<http://java.sun.com/docs/books/jls/third_edition/html/execution.html#12.8>