A customer pointed out where GrowableArray is not released.
The following source code maps GrowableArray to c heap.
However, the customer can not find out where GrowableArray object are released.

  [hotspot/src/share/vm/memory/concurrentMarkSweepGeneration.cpp]
  6478 void CMSCollector::preserve_mark_work(oop p, markOop m) {
  6479   int PreserveMarkStackSize = 128;
  6480
  6481   if (_preserved_oop_stack == NULL) {
  6482     assert(_preserved_mark_stack == NULL,
  6483            "bijection with preserved_oop_stack");
  6484     // Allocate the stacks
  6485     _preserved_oop_stack  = new (ResourceObj::C_HEAP)
  6486       GrowableArray<oop>(PreserveMarkStackSize, true);
  6487     _preserved_mark_stack = new (ResourceObj::C_HEAP)
  6488       GrowableArray<markOop>(PreserveMarkStackSize, true);
  6489     if (_preserved_oop_stack == NULL || _preserved_mark_stack == NULL) {
  6490       vm_exit_out_of_memory(2* PreserveMarkStackSize * sizeof(oop) /* punt */,
  6491                             "Preserved Mark/Oop Stack for CMS (C-heap)");
  6492     }
  6493   }
  6494   _preserved_oop_stack->push(p);
  6495   _preserved_mark_stack->push(m);
  6496   assert(m == p->mark(), "Mark word changed");
  6497   assert(_preserved_oop_stack->length() == _preserved_mark_stack->length(),
  6498          "bijection");
  6499 }
  
  [hotspot/src/share/vm/utilities/taskqueue.hpp]
  449 void ChunkTaskQueueWithOverflow::initialize() {
  450   _chunk_queue.initialize();
  451   assert(_overflow_stack == 0, "Creating memory leak");
  452   _overflow_stack =
  453     new (ResourceObj::C_HEAP) GrowableArray<ChunkTask>(10, true);
  454 }
  
  
  [hotspot/src/share/vm/utilities/histogram.cpp]
   56 Histogram::Histogram(const char* title,int estimatedCount) {
   57   _title = title;
   58   _elements = new (ResourceObj::C_HEAP) GrowableArray<HistogramElement*>(estimatedCount,true);
   59 }