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Stress test
nsk/stress/jck60/jck60001

intermittenly hangs starting JDK 7 b123 (HS 20 b04), does not hang with JDK 7 b122 (HS 20 b03).

Java stack may be different. Sometimes, there are other threads doing class loading too. It always seems to involve clss21201m1.

1.
"Thread-840" prio=3 tid=0x00920800 nid=0x354 waiting on condition [0xb20fd000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0xed5905e8> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197)
at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:214)
at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:290)
at java.util.concurrent.ConcurrentHashMap$Segment.put(ConcurrentHashMap.java:445)
at java.util.concurrent.ConcurrentHashMap.putIfAbsent(ConcurrentHashMap.java:925)
at java.lang.ClassLoader.getClassLoadingLock(ClassLoader.java:464)
at java.lang.ClassLoader.loadClass(ClassLoader.java:405)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:327)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at javasoft.sqe.tests.lang.dasg196.dasg19603m0.dasg19603m0.run(dasg19603m0.java:310)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:613)
at nsk.stress.share.StressTest$TestThread.runTest(StressTest.java:735)
at nsk.stress.share.StressTest$TestThread.run(StressTest.java:768)

"Thread-459" prio=3 tid=0x007b7400 nid=0x1d7 waiting on condition [0xc9f7d000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0xed5905e8> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197)
at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:214)
at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:290)
at java.util.concurrent.ConcurrentHashMap$Segment.put(ConcurrentHashMap.java:445)
at java.util.concurrent.ConcurrentHashMap.putIfAbsent(ConcurrentHashMap.java:925)
at java.lang.ClassLoader.getClassLoadingLock(ClassLoader.java:464)
at java.lang.ClassLoader.loadClass(ClassLoader.java:405)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:327)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:186)
at javasoft.sqe.tests.lang.clss212.clss21201m1.clss21201m1.run(clss21201m1.java:1200)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:613)
at nsk.stress.share.StressTest$TestThread.runTest(StressTest.java:735)
at nsk.stress.share.StressTest$TestThread.run(StressTest.java:768)

"Thread-174" prio=3 tid=0x005ad800 nid=0xba waiting on condition [0xdbd7c000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0xed5905e8> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197)
at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:214)
at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:290)
at java.util.concurrent.ConcurrentHashMap$Segment.put(ConcurrentHashMap.java:445)
at java.util.concurrent.ConcurrentHashMap.putIfAbsent(ConcurrentHashMap.java:925)
at java.lang.ClassLoader.getClassLoadingLock(ClassLoader.java:464)
at java.lang.ClassLoader.loadClass(ClassLoader.java:405)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:327)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at javasoft.sqe.tests.lang.binc049.binc04901.binc04901c.(binc04901c.java:33)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:530)
at java.lang.Class.newInstance0(Class.java:372)
at java.lang.Class.newInstance(Class.java:325)
at javasoft.sqe.tests.lang.binc049.binc04901.binc04901.run(binc04901.java:23)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:613)
at nsk.stress.share.StressTest$TestThread.runTest(StressTest.java:735)
at nsk.stress.share.StressTest$TestThread.run(StressTest.java:768)

"Thread-459" prio=3 tid=0x006b2800 nid=0x1d7 waiting on condition [0xc9f7d000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0xed58f930> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197)
at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:214)
at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:290)
at java.util.concurrent.ConcurrentHashMap$Segment.put(ConcurrentHashMap.java:445)
at java.util.concurrent.ConcurrentHashMap.putIfAbsent(ConcurrentHashMap.java:925)
at java.lang.ClassLoader.getClassLoadingLock(ClassLoader.java:464)
at java.lang.ClassLoader.loadClass(ClassLoader.java:405)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:327)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:186)
at javasoft.sqe.tests.lang.clss212.clss21201m1.clss21201m1.run(clss21201m1.java:1200)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:613)
at nsk.stress.share.StressTest$TestThread.runTest(StressTest.java:735)
at nsk.stress.share.StressTest$TestThread.run(StressTest.java:768)

Thread-459" prio=3 tid=0x007af400 nid=0x1d7 waiting on condition [0xc9f60000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0xed58f930> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197)
at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:214)
at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:290)
at java.util.concurrent.ConcurrentHashMap$Segment.put(ConcurrentHashMap.java:445)
at java.util.concurrent.ConcurrentHashMap.putIfAbsent(ConcurrentHashMap.java:925)
at java.lang.ClassLoader.getClassLoadingLock(ClassLoader.java:464)
at java.lang.ClassLoader.loadClass(ClassLoader.java:405)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:327)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:796)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:144)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:382)
at java.net.URLClassLoader.access$100(URLClassLoader.java:75)
at java.net.URLClassLoader$1.run(URLClassLoader.java:294)
at java.net.URLClassLoader$1.run(URLClassLoader.java:288)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:287)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
- locked <0xe8029340> (a java.lang.Object)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:327)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
...
- locked <0xe8452dc0> (a java.lang.Object)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:327)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:186)
at javasoft.sqe.tests.lang.clss212.clss21201m1.clss21201m1.run(clss21201m1.java:1200)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:613)
at nsk.stress.share.StressTest$TestThread.runTest(StressTest.java:735)
at nsk.stress.share.StressTest$TestThread.run(StressTest.java:768)