APAR status
Closed as program error.
Error description
Deadlock detected in webcontainer code
"com.ibm.ws.webcontainer.WebAppHost"
com.ibm.ws.webcontainer.WebAppHost@1D4B77B8/1D4B77C0: Flat
locked by thread ident 0xA3,
Waiting to be notified:
"Servlet.Engine.Transports : 689" (0x5F043568)
"Servlet.Engine.Transports : 675" (0x60E87838)
"Servlet.Engine.Transports : 704" (0x5F7103B0)
.......................
"Servlet.Engine.Transports : 684" (0x5F043568)
There is a synchronized function inside WebAppHost which calls
another synchronized fucntion in WebContainer.java
Now again the WebContainer.java thread looks for the same
WebAppHost object.
There are no stacks in the thread dumps
Local fix
No work aorund available
Problem summary
****************************************************************
* USERS AFFECTED: Websphere Application Server version 5.1 *
* users who try to start and access *
* applications and are using Servlet *
* Listeners *
****************************************************************
* PROBLEM DESCRIPTION: When you try to start an application *
* and use a servlet Listener you get a *
* deadlock problem *
****************************************************************
* RECOMMENDATION: *
****************************************************************
Websphere application server version 5.1 users who try to
access an application and at the sametime use any listener,
may see a hang while accessing the application. This problem
is intermittent.
This happens due to deadlock
Thread1.atcom.ibm.ws.webcontainer.WebAppHost.
findWebGroupByURI(WebAppHost.java(CompiledCode))
=
THREAD1 waits for WEBAPPHOSTObject
which is waiting for:
com.ibm.ws.webcontainer.WebAppHost
whichisownedby:
THREAD2.
=
Thread2
com.ibm.ws.webcontainer.WebContainer.
getWebGroup(WebContainer.java(CompiledCode))
===
Thread 2 is waiting for WEBCONTAINER Object
is waitingfor:
com.ibm.ws.webcontainer.WebContainer
whichisownedby:
THREAD1
===
This problem happened because of an unnecessary sync of a
function.
Problem conclusion
Changed the getWebGroup function which was responsible for the
deadlock.
The fix for this APAR is currently targeted for inclusion
in cumulative fix 5.1.1.9
Please refer to the recommended updates page for delivery
information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
Temporary fix Comments
APAR information |
APAR number |
PK13493 |
Reported component name |
WAS BASE 5.0 |
Reported component ID |
5630A3600 |
Reported release |
00W |
Status |
CLOSED PER |
PE |
NoPE |
HIPER |
NoHIPER |
Special Attention |
NoSpecatt |
Submitted date |
2005-10-14 |
Closed date |
2005-12-12 |
Last modified date |
2005-12-12 |
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Modules/Macros
Publications Referenced
|
Fix information |
Fixed component name |
WAS BASE 5.0 |
Fixed component ID |
5630A3600 |
Applicable component levels |
R003 PSY |
UP |
R00A PSY |
UP |
R00H PSY |
UP |
R00I PSY |
UP |
R00P PSY |
UP |
R00S PSY |
UP |
R00W PSY |
UP |
R103 PSY |
UP |
R10A PSY |
UP |
R10H PSY |
UP |
R10I PSY |
UP |
R10P PSY |
UP |
R10S PSY |
UP |
R10W PSY |
UP |
|