[jira] [Closed] (HBASE-19040) CP service exec broken for older clients after PB namespace addition

["Andrew Kyle Purtell (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-19040?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Kyle Purtell closed HBASE-19040.
---------------------------------------
    Assignee:     (was: Josh Elser)

> CP service exec broken for older clients after PB namespace addition
> --------------------------------------------------------------------
>
>                 Key: HBASE-19040
>                 URL: https://issues.apache.org/jira/browse/HBASE-19040
>             Project: HBase
>          Issue Type: Bug
>          Components: Coprocessors, Protobufs
>            Reporter: Josh Elser
>            Priority: Blocker
>
> Was investigating an upgrade failure at dayjob. The "old" version did not include HBASE-14077 while the new version did include HBASE-14077.
> After the servers have been upgraded, the clients which try to execute CP calls will begin to fail with a message such as:
> {noformat}
> $ hbase(main):001:0> user_permission
> User                                                 Namespace,Table,Family,Qualifier:Permission
> ERROR: org.apache.hadoop.hbase.exceptions.UnknownProtocolException: No registered coprocessor service found for name AccessControlService in region hbase:acl,,1508228211139.0ef76894681187f0ef958e78aed64d30.
> 	at org.apache.hadoop.hbase.regionserver.HRegion.execService(HRegion.java:7829)
> 	at org.apache.hadoop.hbase.regionserver.RSRpcServices.execServiceOnRegion(RSRpcServices.java:1980)
> 	at org.apache.hadoop.hbase.regionserver.RSRpcServices.execService(RSRpcServices.java:1962)
> 	at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:32389)
> 	at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2150)
> 	at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:112)
> 	at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:187)
> 	at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:167)
> {noformat}
> The funny part is that the Region actually has a CP registered under the name {{hbase.pb.AccessControlService}}, but the client asks for one under {{AccessControlService}}.
> I think the easy fix is to deploy the CP under both names while HBase services support client backwards compatibility with 1.x clients.



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