Unable to shutdown Instance in Sun Application Server EE 8.1

Hi,

When I try to restart the instance I get the below error message:

Operation 'stopServerInstance' failed in 'servers' Config Mbean.

Target exception message: com.sun.enterprise.admin.servermgmt.InstanceException: Failed to stop server instance name01_instance.

CLI137 Command stop-instance failed.

I then have to go and shut down nodeagent & domain and see if there are any outstanding process running and kill it manually.

After I do this then it all comes back up fine.

Any ideas why this happens ? It used to work the first few times and it started giving this problem.

[632 byte] By [TS777] at [2007-11-26 8:39:39]