src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp

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*** 1687,1696 **** --- 1687,1698 ---- unsigned int gc_count = gch->total_full_collections(); if (gc_count == full_gc_count) { MutexLockerEx y(CGC_lock, Mutex::_no_safepoint_check_flag); _full_gc_requested = true; CGC_lock->notify(); // nudge CMS thread + } else { + assert(gc_count > full_gc_count, "Error: causal loop"); } } // The foreground and background collectors need to coordinate in order