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Seeing Many Stuck Threads in WebCenter Spaces Manager Server (Doc ID 2399631.1)

Last updated on DECEMBER 03, 2020

Applies to:

Oracle WebCenter Portal - Version 11.1.1.8.6 and later
Information in this document applies to any platform.

Symptoms

 

Stuck threads are being observed in the WebCenter Portal/Spaces Managed Server logs.

Some of the stuck threads look like these:

 

                [STUCK] ExecuteThread: '37' for queue: 'weblogic.kernel.Default (self-tuning)'" id=<ID> idx=<IDX> tid=<TID> prio=1 alive, blocked, native_blocked, daemon

                -- Blocked trying to get lock: weblogic/security/providers/authentication/LDAPAtnCache@0x6e8114fe0[unlocked]          
                at jrockit/vm/Threads.waitForUnblockSignal()V(Native Method)          
                at jrockit/vm/Locks.fatLockBlockOrSpin(Locks.java:1411)          
                at jrockit/vm/Locks.lockFat(Locks.java:1512)[optimized]          
                at jrockit/vm/Locks.monitorEnterSecondStageHard(Locks.java:1054)[optimized]          
                at jrockit/vm/Locks.monitorEnterSecondStage(Locks.java:1005)[optimized]          
                at jrockit/vm/Locks.monitorEnter(Locks.java:2179)[optimized]          
                at weblogic/security/providers/authentication/LDAPAtnCache.getUserDN(LDAPAtnCache.java:39)          
                at weblogic/security/providers/authentication/LDAPAtnDelegate.getDNForUser(LDAPAtnDelegate.java:3678)
                at weblogic/security/providers/authentication/LDAPAtnDelegate.getUserNameAttrField(LDAPAtnDelegate.java:2365)

 

or

 

                [STUCK] ExecuteThread: '15' for queue: 'weblogic.kernel.Default (self-tuning)'" <alive, suspended, blocked, priority=1, DAEMON> {

                -- Blocked trying to get lock: weblogic.servlet.internal.session.ReplicatedSessionChange@374b5b64[fat lock]
                weblogic.servlet.internal.session.ReplicatedSessionChange.init(ReplicatedSessionChange.java:59)
                weblogic.servlet.internal.session.ReplicatedSessionData.setInternalAttribute(ReplicatedSessionData.java:556)
                weblogic.servlet.security.internal.SecurityModule.getCurrentUser(SecurityModule.java:160)
                weblogic.servlet.security.internal.ChainedSecurityModule.checkAccess(ChainedSecurityModule.java:69)
                weblogic.servlet.security.internal.ServletSecurityManager.checkAccess(ServletSecurityManager.java:82)
                weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2219)
                weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2182)
                weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1491)
                weblogic.work.ExecuteThread.execute(ExecuteThread.java:263)
                weblogic.work.ExecuteThread.run(ExecuteThread.java:221)
                ...

             

or

 

               [STUCK] ExecuteThread: '24' for queue: 'weblogic.kernel.Default (self-tuning)'" <alive, suspended, waiting, priority=1, DAEMON> {

                -- Waiting for notification on: weblogic.rjvm.ResponseImpl@48e14eba[fat lock]
                java.lang.Object.wait(Object.java:???)
               weblogic.rjvm.ResponseImpl.waitForData(ResponseImpl.java:90)
               weblogic.rjvm.ResponseImpl.getTxContext(ResponseImpl.java:130)
               weblogic.rjvm.BasicOutboundRequest.sendReceive(BasicOutboundRequest.java:110)
               weblogic.rmi.internal.BasicRemoteRef.invoke(BasicRemoteRef.java:222)
               weblogic.cluster.replication.ReplicationManager_1036_WLStub.create(Unknown Source)
               sun.reflect.GeneratedMethodAccessor2906.invoke(Unknown Source)
               sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
               java.lang.reflect.Method.invoke(Method.java:597)
               weblogic.cluster.replication.SecureReplicationInvocationHandler$ReplicationServicesInvocationAction.run(SecureReplicationInvocationHandler.java:194)
               weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
               weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
               weblogic.cluster.replication.SecureReplicationInvocationHandler.invoke(SecureReplicationInvocationHandler.java:164)
               ...



A workaround is to recycle the Managed Server, but this is not feasible fix.

The expected behavior is that the Spaces Manager Server will run unhindered and without issue (running without the presence of stuck threads).

 

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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