Minor Description
We can get a NPE in RsRpcServices at
} finally { if (regionServer.metricsRegionServer != null) { regionServer.metricsRegionServer.updateGet( -> region.getTableDesc().getTableName(), EnvironmentEdgeManager.currentTime() - before); } if (quota != null) { quota.close(); }
when region itself is null which might happen when getRegion throws an exception, this is then sent back to the client which is not able to handle this/make sense of it.
2018-03-06 08:31:25,100 DEBUG [0,queue=4,port=60020] ipc.RpcServer - RpcServer.FifoWFPBQ.default.handler=30,queue=4,port=60020: callId: 5605567 service: ClientService methodName: Get size: 79 connection: xyz:58736 deadline: 9223372036854775807
java.io.IOException
at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2431)
at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:124)
at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:188)
at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:168)
Caused by: java.lang.NullPointerException
at org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:2246)
at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:35068)
at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2373)
... 3 more
This has been fixed by stack over at HBASE-18946 for master, backporting the same to branch-1, 1.3 and 1.4