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https://issues.apache.org/jira/browse/HBASE-16830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15573928#comment-15573928
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Matteo Bertozzi commented on HBASE-16830:
-----------------------------------------

the new patch throwing an exception seems to make more sense to me. we should 
fail if the htd is not there.. but still i'm not able to explain why we get a 
null htd. from the logs it looks like we write the htd, not sure why it is not 
picked up
{noformat}
2016-10-13 15:40:45,502 DEBUG [ProcedureExecutor-0] 
util.FSTableDescriptors(660): Wrote descriptor into: 
hdfs://localhost:59174/user/tyu/test-data/0e6c632f-42e6-4495-9a49-2f09184cddca/.tmp/data/hbase/namespace/.tabledesc/.tableinfo.0000000001
{noformat}

> RSRpcServices#openRegion() should handle the case where table descriptor is 
> null
> --------------------------------------------------------------------------------
>
>                 Key: HBASE-16830
>                 URL: https://issues.apache.org/jira/browse/HBASE-16830
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 1.3.0
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>             Fix For: 1.3.0
>
>         Attachments: 16830.branch-1.3.txt, 16830.branch-1.3.txt, 
> testClusterId-output.txt
>
>
> 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:
> {code}
> 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)
> {code}
> It turned out that htd for hbase:namespace table was null.
> Once the NPE is fixed, the test passes.



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