We have recurring Weblogic threads hanging for 600+ seconds, or sometimes only 30 seconds (which is just as bad) on seemingly trivial Java Reflection operations.
Stream dumps and the WebLogic built-in alert about a stuck stream, all show the same native code, but I don’t know what can cause it to hang for such long intervals (the thread is stuck below).
I noticed that the message appears, which is strange since the JDK itself is jdk160_16.
This is on Solaris with active I / O enabled, but maybe some other settings are wrong?
Different threads have different earlier code, but the stuck section is always the same:
"[STUCK] ExecuteThread: '2' for queue: 'weblogic.kernel.Default (self-tuning)'" daemon prio=3 tid=0x01c2f000 nid=0x74 runnable [0x5bcfc000]
java.lang.Thread.State: RUNNABLE
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
at java.lang.Class.getConstructor0(Class.java:2699)
at java.lang.Class.newInstance0(Class.java:326)
at java.lang.Class.newInstance(Class.java:308)
at sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:381)
at java.security.AccessController.doPrivileged(Native Method)
at sun.reflect.MethodAccessorGenerator.generate(MethodAccessorGenerator.java:377)
at sun.reflect.MethodAccessorGenerator.generateMethod(MethodAccessorGenerator.java:59)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:28)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
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