nsk/stress/jni/jnistress005 fails on solapis-sparc with strange output:

NATIVE: Throw has been catched in native
JAVA: java.lang.ArrayIndexOutOfBoundsException: java/lang/ArrayIndexOutOfBoundsException
Here
counts 0 CountException 0
Cycle: 0Here
counts 0 CountException 1
  Interrupt count=4 Native interrupt count=2
Here
counts 0 CountException 2
Cycle: 1Here
counts 0 CountException 3
/net/vmsqe-e250/export1/vmsqe/jdk-builds/JDK6.0b46/solaris-sparc/jre/lib/rt.jar: error reading zip file
Unexpected exception:
Exception in thread "Thread-4" java.lang.NoClassDefFoundError: java/lang/CloneNotSupportedException
        at nsk.stress.jni.JNIStress005.JNIter.except(Native Method)
        at nsk.stress.jni.JNIStress005.JNIter.run(jnistress005.java:309)

===

All output produced by test source except one line from hotspot:
/net/vmsqe-e250/export1/vmsqe/jdk-builds/JDK6.0b46/solaris-sparc/jre/lib/rt.jar: error reading zip file

after this event class loading fails and test fails also. It seems, however, that rt.jar is correct file because all other tests runs fine. Failure occures on b45 and b46 builds, and never occures before.
I have attached test sources to reproduce failure.