Major Description
Over in HBASE-16349, mantonov pointed me to the failed TestClusterId in Jenkins 1.3 build.
I ran the test locally with Java 8 and consistently stumbled over timeout in starting the mini cluster:
2016-10-13 15:41:05,276 INFO [RpcServer.FifoWFPBQ.priority.handler=5,queue=1,port=59233] regionserver.RSRpcServices(1620): Open hbase:namespace,,1476398463993. 7ab1d0b3b7be8b9a7ce9af61c29d5342. 2016-10-13 15:41:05,277 ERROR [RpcServer.FifoWFPBQ.priority.handler=5,queue=1,port=59233] ipc.RpcServer(2320): Unexpected throwable object java.lang.NullPointerException at org.apache.hadoop.hbase.regionserver.RSRpcServices.openRegion(RSRpcServices.java:1679) at org.apache.hadoop.hbase.protobuf.generated.AdminProtos$AdminService$2.callBlockingMethod(AdminProtos.java:22737) at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2270) at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:123) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:188) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:168)
It turned out that htd for hbase:namespace table was null.
Once the NPE is fixed, the test passes.