Failed to acquire exclusive lock on client session ClientSession

Question

HI all.
when I login the Portal as a MSS role,I want to see about the data of employee(about 20000 employee).
some page can't open succeed.The error:
500   Internal Server Error
  SAP NetWeaver Application Server 7.00/Java AS 7.00 
Failed to process request. Please contact your system administrator.
Error Summary
While processing the current request, an exception occured which could not be handled by the application or the framework.
If the information contained on this page doesn't help you to find and correct the cause of the problem, please contact your system administrator. To facilitate analysis of the problem, keep a copy of this error page. Hint: Most browsers allow to select all content, copy it and then paste it into an empty document (e.g. email or simple text file).
Root Cause
The initial exception that caused the request to fail, was:
   com.sap.tc.webdynpro.services.session.LockException: Thread SAPEngine_Application_Thread[impl:3]_27 failed to acquire exclusive lock on client session ClientSession(id=(DSAPBPRD_DPP_01)ID2006199550DB11722229503911854949End_53412655). Existing locks: LockingManager(ThreadName:SAPEngine_Application_Thread[impl:3]_27, exclusive client session lock: ClientSessionLock(SAPEngine_Application_Thread[impl:3]_29), shared client session locks: ClientSessionSharedLockManager([]), app session locks: ApplicationSessionLockManager([]), current request: sap.com/pb/PageBuilder).Hint: Take a thread dump of the server node to find the blocking thread that causes the problem.
    at java.lang.Throwable.<init>(Throwable.java:56)
    at com.sap.exception.BaseException.<init>(BaseException.java:145)
    at com.sap.tc.webdynpro.services.exceptions.WDException.<init>(WDException.java:61)
    at com.sap.tc.webdynpro.services.exceptions.WDException.<init>(WDException.java:54)
    at com.sap.tc.webdynpro.clientserver.session.ClientSession$LockingManager.lock(ClientSession.java:1511)
    ... 20 more
Edited by: cui joe on Jun 16, 2009 5:36 AM

Answer 1

HI,thanks very much.
Because our data is very huge,so some leader login the system will get the error.I check the st22,It realy found the error:
Time limit exceeded.
The program "SAPLRHDB" has exceeded the maximum permitted runtime without
interruption and has therefore been terminated.
If I should increase the system profile parameter "rdisp/max_wprun_time"?
Can else I should turn other parameter?