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This one fails a bit on master at least:
https://builds.apache.org/view/H-L/view/HBase/job/HBase-Trunk_matrix/496/jdk=latest1.8,label=Hadoop/testReport/junit/org.apache.hadoop.hbase.regionserver/TestSplitTransactionOnCluster/testSSHCleanupDaugtherRegionsOfAbortedSplit/history/
... about 15% of the time.