Please attach any additional information that are in ULOG file. Use your operating system method to see what your process is doing (for example procstack on aix in a loop with some sleep time in between) and your database way to see if you have some locks on your <TABLE> - perhaps you are doing full table scan and have some records locked?. Do you have core file generated? Maybe tuxedo is killing your server because of service timeout caused by database locks?
Can you add the ULOG file and ubbconfig?. The server's dead. Do you have any timeouts set up?. It is possible that the query will take a long time and tuxedo is restarting the server by exceeding the configured timeout