When the attached program(bid6266681.c/bid6266681.java) is executed in 5.0, a hang will occurs.

The following is the trace information with gdb.

(gdb) where
#0 0xb75d227d in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/libpthread.so.0
#1 0xb75d27cd in pthread_cond_wait@GLIBC_2.0 () from /lib/tls/libpthread.so.0
#2 0xb6f7bf8e in os::Linux::safe_cond_wait ()
   from /JavaL3/users/ooooo/java-bin/jdk1.5.0_07/jre/lib/i386/client/libjvm.so
#3 0xb6f683b4 in Monitor::wait ()
   from /JavaL3/users/ooooo/java-bin/jdk1.5.0_07/jre/lib/i386/client/libjvm.so
#4 0xb6e31c9d in GC_locker::stall_until_clear ()
   from /JavaL3/users/ooooo/java-bin/jdk1.5.0_07/jre/lib/i386/client/libjvm.so
#5 0xb6df2529 in TwoGenerationCollectorPolicy::mem_allocate_work ()
   from /JavaL3/users/ooooo/java-bin/jdk1.5.0_07/jre/lib/i386/client/libjvm.so
#6 0xb6e3551d in GenCollectedHeap::mem_allocate ()
   from /JavaL3/users/ooooo/java-bin/jdk1.5.0_07/jre/lib/i386/client/libjvm.so
#7 0xb6d2a038 in CollectedHeap::common_mem_allocate_noinit ()
   from /JavaL3/users/ooooo/java-bin/jdk1.5.0_07/jre/lib/i386/client/libjvm.so
#8 0xb6e4cb17 in instanceKlass::allocate_instance ()
   from /JavaL3/users/ooooo/java-bin/jdk1.5.0_07/jre/lib/i386/client/libjvm.so
#9 0xb6db08ae in Runtime1::new_instance ()
   from /JavaL3/users/ooooo/java-bin/jdk1.5.0_07/jre/lib/i386/client/libjvm.so


NOTE:
 The attached program tries to do
  1) One thread tries to allocate repeatedly.(GC will occurs periodically)
  2) Another thread tries to lock/unlock thru jvmpi