Issue

• Fatal error log on Oracle JDK 1.6 shows SIGSEGV with the current thread GCTaskThread:

#  SIGSEGV (0xb) at pc=0x00007f028c329dc9, pid=17444, tid=139648850336080
#
# JRE version: 6.0_18-b07
# Java VM: Java HotSpot(TM) 64-Bit Server VM (16.0-b13 mixed mode linux-amd64 )
# Problematic frame:
# V  [libjvm.so+0x3b1dc9]
...
---------------  T H R E A D  ---------------

Current thread (0x0000000040125000):  GCTaskThread [stack: 0x0000000000000000,0x0000000000000000] [id=17465]

• Windows equivalent of the above:

#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x000000006da2d487, pid=2420, tid=2780
#
# JRE version: 6.0_24-b07
# Java VM: Java HotSpot(TM) 64-Bit Server VM (19.1-b02 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# V  [jvm.dll+0x19d487]
...
---------------  T H R E A D  ---------------

Current thread (0x0000000000315000):  GCTaskThread [stack: 0x00000000066c0000,0x00000000067c0000] [id=2780]

• Fatal error log on Oracle JDK 1.7 shows SIGBUS with the current thread GCTaskThread:

#  SIGBUS (0x7) at pc=0x00007fe7dde3fb73, pid=5780, tid=140633812121344
#
# JRE version: 7.0_25-b15
# Java VM: Java HotSpot(TM) 64-Bit Server VM (23.25-b01 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# V  [libjvm.so+0x3a6b73]  CompactibleFreeListSpace::par_get_chunk_of_blocks(unsigned long, unsigned long, FreeList*)+0x6d3
...
---------------  T H R E A D  ---------------

Current thread (0x00007fe7d801f000):  GCTaskThread [stack: 0x0000000000000000,0x0000000000000000] [id=5793]

• Fatal error log shows live objects in both the "from space" and "to space":

Heap
 par new generation   total 76672K, used 76249K [0x00007f015ebe0000, 0x00007f0163f10000, 0x00007f0163f10000)
  eden space 68160K, 100% used [0x00007f015ebe0000, 0x00007f0162e70000, 0x00007f0162e70000)
  from space 8512K,  95% used [0x00007f0162e70000, 0x00007f01636566e0, 0x00007f01636c0000)
  to   space 8512K,  76% used [0x00007f01636c0000, 0x00007f0163d13ef0, 0x00007f0163f10000)
 concurrent mark-sweep generation total 4522816K, used 3098645K [0x00007f0163f10000, 0x00007f0277fe0000, 0x00007f0277fe0000)
 concurrent-mark-sweep perm gen total 190088K, used 112863K [0x00007f0277fe0000, 0x00007f0283982000, 0x00007f0287fe0000)

• The Stack in the fatal error log shows the crash happens when promoting objects from the eden space to the survivor space:

Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V  [libjvm.so+0x3a6b73]  CompactibleFreeListSpace::par_get_chunk_of_blocks(unsigned long, unsigned long, FreeList*)+0x6d3
V  [libjvm.so+0x3a6e43]  CFLS_LAB::get_from_global_pool(unsigned long, FreeList*)+0xb3
V  [libjvm.so+0x3a7ea5]  CFLS_LAB::alloc(unsigned long)+0xe5
V  [libjvm.so+0x3e23c5]  ConcurrentMarkSweepGeneration::par_promote(int, oopDesc*, markOopDesc*, unsigned long)+0xa5
V  [libjvm.so+0x759fe1]  ParNewGeneration::copy_to_survivor_space_avoiding_promotion_undo(ParScanThreadState*, oopDesc*, unsigned long, markOopDesc*)+0xc1