WebSphere Liberty Profile randomly stops accepting TCP/SSL connections.


Article ID: 40112


Updated On:


APP PERF MANAGEMENT CA Application Performance Management Agent (APM / Wily / Introscope) CUSTOMER EXPERIENCE MANAGER INTROSCOPE



 The WebSphere Liberty Profile (WLP) randomly stops accepting TCP connections.

 The JVM may stop accepting incoming TCP connections for up to 30 minutes.

 During the problem time period, there are a lot of RUNNABLE threads in the following method, and there is nothing in  process even though the threads are reported as RUNNABLE.

at sun.security.pkcs11.wrapper.PKCS11.C_DestroyObject(Native Method)
at sun.security.pkcs11.SessionKeyRef.dispose(P11Key.java:1138)
at sun.security.pkcs11.SessionKeyRef.drainRefQueueBounded(P11Key.java:1114)
at sun.security.pkcs11.SessionKeyRef. (P11Key.java:1129)
at sun.security.pkcs11.P11Key. (P11Key.java:119)
at sun.security.pkcs11.P11Key$P11SecretKey. (P11Key.java:405)
at sun.security.pkcs11.P11Key.secretKey(P11Key.java:292)
at sun.security.pkcs11.P11SecretKeyFactory.createKey(P11SecretKeyFactory.java:267)
at sun.security.pkcs11.P11SecretKeyFactory.convertKey(P11SecretKeyFactory.java:175)
at sun.security.pkcs11.P11SecretKeyFactory.convertKey(P11SecretKeyFactory.java:111)


  • WebSphere Liberty Profile
  • Java VM version "Java HotSpot(TM) 64-Bit Server VM 1.8.0_45" from Oracle Corporation
  • Solaris 10 Sparc 
  • APM version (Build 16)


The behavior has been reported with the RUNNABLE threads that resembles this Solaris 10 bug:

No response in calling sun.security.pkcs11.wrapper.PKCS11.C_DestroyObject(Native

To ignore this Java security provider, the customer tested disabling the SunPKCS11 crytographic provider as below in system and this solved the problem.

The " sun.security.pkcs11.enable-solaris=false", is actually a Java problem and nothing related to APM. Excluding it should mean Java uses some other public key encryption standards from the security file ($JAVA_HOME/lib/security/java.security)


Release: CEMUGD00200-9.7-Introscope to CA Application-Performance Management-Upgrade Main