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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14157) Interfaces implemented by subclasses should be checked when registering CoprocessorService
Date Mon, 27 Jul 2015 23:39:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14643619#comment-14643619
] 

Ted Yu commented on HBASE-14157:
--------------------------------

The fix has been verified by Alok through Apache Ranger.

> Interfaces implemented by subclasses should be checked when registering CoprocessorService
> ------------------------------------------------------------------------------------------
>
>                 Key: HBASE-14157
>                 URL: https://issues.apache.org/jira/browse/HBASE-14157
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Alok Lal
>            Assignee: Ted Yu
>             Fix For: 2.0.0, 1.2.0, 1.1.2, 1.3.0
>
>         Attachments: 14157-v1.txt, 14157-v2.txt, 14157-v2.txt, 14157-v3.txt
>
>
> Alok reported seeing the following exception when subclass of class which implements
CoprocessorService is used for hbase.coprocessor.region.classes :
> {code}
> hbase(main):015:0> grant 'mktg1', 'RWC', 'iemployee'
> ERROR: org.apache.hadoop.hbase.exceptions.UnknownProtocolException: No registered coprocessor
service found for name AccessControlService in region hbase:acl,,1437137157604.2daf735ea38da95e9ba249db6b63b79c.
>         at org.apache.hadoop.hbase.regionserver.HRegion.execService(HRegion.java:7367)
>         at org.apache.hadoop.hbase.regionserver.RSRpcServices.execServiceOnRegion(RSRpcServices.java:1873)
>         at org.apache.hadoop.hbase.regionserver.RSRpcServices.execService(RSRpcServices.java:1855)
>         at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:32209)
>         at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2112)
>         at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:101)
>         at org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:130)
>         at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:107)
> {code}
> The root cause is in the following code of RegionCoprocessorHost:
> {code}
>     for (Class<?> c : implClass.getInterfaces()) {
>       if (CoprocessorService.class.isAssignableFrom(c)) {
>         region.registerService( ((CoprocessorService)instance).getService() );
>       }
>     }
> {code}
> We currently only check the interfaces directly implemented by the underlying class.
> What should be done is to check all the interfaces implemented by class itself and its
superclasses.



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