forums.smartfoxserver.com

We are getting server crashes every 1-2 days. Using the jstack tool I was able to get the following deadlock report from the jvm:

Deadlock Detection:

Found one Java-level deadlock:
=============================

"Timer-1":
waiting to lock Monitor@0x00002aac54b5fbf8 (Object@0x00002aab14f448a0, a java/
util/LinkedList),
which is held by "EventWriter-14"
"EventWriter-14":
waiting to lock Monitor@0x00002aac54b629e8 (Object@0x00002aaad26bf1a0, a java/
util/LinkedList),
which is held by "Timer-1"

Found a total of 1 deadlock.


Looks like a classic case of deadlock - thread 1 has object A and wants object B, and thread 2 has B and is waiting for A.

This happens under 1.5.5 with the 1.5.8c jysfs.jar patch. We are using actionscript room and zone extensions.

If there's any other information I could provide to help you debug this, please let me know. If you have any ideas for a workaround we'd love to hear them.


Thanks

Hi,
I've sent you an email with the list of files we need.

Since you mentioned jstack I'd like to add that is possible to have a Thread dump in other two ways:

1- By pressing CTRL + \ (Linux) or CTRL + Break (Win) if you're running the app interactively in a terminal/console

2- (*nix only) By sending a kill -QUIT pid command to the application (where pid is the process id)