Exception Signal 11 while running JAVA code in UNIX

Hi,

when i compile my java code in UNIX using javac, the class file is getting created. But when i try to run the code using java - classpath command, i get the following error.

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/u/up11/sample/request:>java -classpath /u/up11/sample/request Inbound
JVMDG217: Dump Handler is Processing Signal 11 - Please Wait.
JVMHP002: JVM requesting System Transaction Dump
JVMHP012: System Transaction Dump written to UP11.JVM.TDUMP.UP11.D080811.T074931
JVMDG303: JVM Requesting Java core file
JVMDG304: Java core file written to /u/up11/sample/request/JAVADUMP.20080811.074
939.16908532.txt
JVMDG215: Dump Handler has Processed Exception Signal 11.
[1] + Done(139) java -classpath /u/up11/sample/request Inbound
16908532 Segmentation violation /usr/lpp/java/J1.4/bin/java
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i have attached the JAVADUMP.20080811.080105.33685759.txt for reference..

what is causing this problem ? please help me with some solutions. thanks.