"Thread-27" #114 prio=5 os_prio=0 tid=0x00007f0feb06e800 nid=0x9f2 runnable [0x00007f0da57da000]
   java.lang.Thread.State: RUNNABLE
        at java.util.HashMap.hash(HashMap.java:338)
        at java.util.HashMap.put(HashMap.java:611)
        at java.util.HashSet.add(HashSet.java:219)
        at org.apache.cassandra.stress.generate.PartitionIterator$MultiRowIterator.fill(PartitionIterator.java:627)
        at org.apache.cassandra.stress.generate.PartitionIterator$MultiRowIterator.fill(PartitionIterator.java:595)
        at org.apache.cassandra.stress.generate.PartitionIterator$MultiRowIterator.reset(PartitionIterator.java:252)
        at org.apache.cassandra.stress.generate.PartitionIterator.reset(PartitionIterator.java:107)
        at org.apache.cassandra.stress.Operation.reset(Operation.java:124)
        at org.apache.cassandra.stress.Operation.ready(Operation.java:107)
        at org.apache.cassandra.stress.StressAction$Consumer.run(StressAction.java:301)