jDLS Locks are not getting released

Hi All,

We have 2 application servers Server1 and Server 2 ,
They are both R09 and installed jDLS using jServControl -p...\jDLS.exe -s30720,50" jDLS install.

Server 1 is the primary server and Server 2 is the secondary server. They were installed jDLS both.
And we have a Big IP(F5) to distrubuted workflow.
If Server 1 is on busy or overload/shutdown, Server 2 would take over part of the work

On every working day during 3 pm to 5 pm, we usually occur user cannot login to Desktop.
If we tried using Telnet to login classicmode, it would print errors below:
Error 10064 during READ_ERROR to file default_F_USER


Now the temporary solution is clear all the file below TAFC/proc and restart jDLS server.
We guess there goes to a dead lock situation. But we don't know how to fix it.

Any ideas why jBASE jDLS is behaving like this? Any suggestions are appreciated.

Thanks & Regards