src/share/vm/runtime/thread.cpp

*** 1478,1487 ****
--- 1478,1488 ----
    _jni_active_critical = 0;
    _pending_jni_exception_check_fn = NULL;
    _do_not_unlock_if_synchronized = false;
    _cached_monitor_info = NULL;
    _parker = Parker::Allocate(this);
+   _bytes_until_sample = 0;
  
  #ifndef PRODUCT
    _jmp_ring_index = 0;
    for (int ji = 0; ji < jump_ring_buffer_size; ji++) {
      record_jump(NULL, NULL, NULL, 0);