Skip to main content

This content has been archived and is no longer being updated. Links may not function; however, this content may be relevant to outdated versions of the product.

Support Article

System Performance



A PRPC71ML6 system running on Websphere Application Server against Oracle database suffered from performance issue. The administrator noticed the system freeze and the database resources are running out.

Error Messages

In the Thread Dumps, there are many entries of the below trace: 

"WebContainer : 45" Id=124435 in WAITING on lock=java.util.concurrent.locks.ReentrantLock$NonfairSync@c8abb9f5 (running in native) 
BlockedCount : 370, BlockedTime : -1, WaitedCount : 94739, WaitedTime : -1 
at sun.misc.Unsafe.park(Native Method) 
at java.util.concurrent.locks.LockSupport.park( 
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt( 
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued( 
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire( 
at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock( 
at java.util.concurrent.locks.ReentrantLock.lock( 
at com.pega.pegarules.priv.factory.AbstractContainerFactory.releaseObject( 
at com.pega.pegarules.priv.factory.AbstractContainerFactory.releaseObject( 

In Websphere Application Server log, many occurrences of the below error has been found. Method)


Steps to Reproduce

The system hangs occasionally and system resources are running out. 

Root Cause

The root cause has not been identified. A few configuration changes have been made and since then the issue has not reoccurred. 


The below changes has been applied:

1) Apply prconfig setting of <env name="compiler/classloadCompilerOutput" value="false"/>.

This setting will address a Thread deadlock issue. See the below PDN article:


2) Install HFix-29456 overcome NullPointerException which occurs after applying <env name="compiler/classloadCompilerOutput" value="false"/>

3) Turned on "Pass by Reference" in WebSphere to improve the performance.  In the Websphere Administrative console:

i) Select Servers -> Server Types -> WebSphere application servers to display the Application servers page.
ii) Click the name of your Pega 7 server to display the Configuration page.
iii) Under Container Settings, expand Container Services, and then click ORB service.

4) The error of Method) appears to be a known Websphere Application Server issue as documented in the below IBM knowledge base article:

To overcome this issue either increase oracle.jdbc.ReadTimeout parameter greater than the server's "total transaction lifetime timeout" or applying socket keep alive parameters providing Websphere Application Server and JDK have been upgraded to support this setting.


Published October 11, 2016 - Updated October 8, 2020

Was this useful?

100% found this useful

Have a question? Get answers now.

Visit the Collaboration Center to ask questions, engage in discussions, share ideas, and help others.

Did you find this content helpful?

Want to help us improve this content?

We'd prefer it if you saw us at our best.

Pega Community has detected you are using a browser which may prevent you from experiencing the site as intended. To improve your experience, please update your browser.

Close Deprecation Notice
Contact us