During huge load some threads hangs on

java.lang.Thread.State: WAITING (parking)             
 java.lang.Thread.State: WAITING (parking)                   
at sun.misc.Unsafe.park(Native Method)                     

• parking to wait for  <0x00000005d2e654a8> (a java.util.concurrent.locks.StampedLock)                     
  at java.util.concurrent.locks.StampedLock.acquireRead(StampedLock.java:1215)                     
  at java.util.concurrent.locks.StampedLock.readLock(StampedLock.java:428)             
  at org.infinispan.container.offheap.OffHeapConcurrentMap.peekOrGet(OffHeapConcurrentMap.java:615)                     
  at org.infinispan.container.offheap.OffHeapConcurrentMap.peek(OffHeapConcurrentMap.java:682) 

I attached Infinispan configuration and three thread dumps:

• off heap storage enabled (Thread dump.txt)
• heap storage enabled (Thread dump - heap storage.txt)
• off heap storage enabled and replicated cache mode="SYNC" (thread dump sync.txt)

Under high load, Infinspan freezes 100% of the cases.