Chinmay Kulkarni created PHOENIX-5374:
-----------------------------------------

             Summary: Incorrect exception thrown in some cases when client does 
not have Exec permissions on SYSTEM:CATALOG
                 Key: PHOENIX-5374
                 URL: https://issues.apache.org/jira/browse/PHOENIX-5374
             Project: Phoenix
          Issue Type: Improvement
            Reporter: Chinmay Kulkarni
            Assignee: Chinmay Kulkarni


Scenario:
* Server and client-side namespace-mapping is enabled.??citation??
* "hbase.security.exec.permission.checks" is true on the server. Thus, EXEC 
permission checking will be performed during coprocessor endpoint invocations. 
* Client does not have EXEC permissions on SYSTEM:CATALOG
* Client calls DriverManager.getConnection(..) and this fails with the 
following exception:


{noformat}
java.sql.SQLException: ERROR 2006 (INT08): Incompatible jars detected between 
client and server. Ensure that phoenix-[version]-server.jar is put on the 
classpath of HBase in every region server: 
org.apache.hadoop.hbase.security.AccessDeniedException: Insufficient 
permissions (user=unprivilegedUser_N000007, scope=SYSTEM:CATALOG, 
params=[table=SYSTEM:CATALOG],action=EXEC)
        at 
org.apache.hadoop.hbase.security.access.AccessChecker.requirePermission(AccessChecker.java:281)
        at 
org.apache.hadoop.hbase.security.access.AccessController.requirePermission(AccessController.java:446)
        at 
org.apache.hadoop.hbase.security.access.AccessController.preEndpointInvocation(AccessController.java:2015)
        at 
org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$64.call(RegionCoprocessorHost.java:1707)
        at 
org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$64.call(RegionCoprocessorHost.java:1704)
        at 
org.apache.hadoop.hbase.coprocessor.CoprocessorHost$ObserverOperationWithResult.callObserver(CoprocessorHost.java:578)
        at 
org.apache.hadoop.hbase.coprocessor.CoprocessorHost.execOperation(CoprocessorHost.java:614)
        at 
org.apache.hadoop.hbase.coprocessor.CoprocessorHost.execOperationWithResult(CoprocessorHost.java:592)
        at 
org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.preEndpointInvocation(RegionCoprocessorHost.java:1703)
        at 
org.apache.hadoop.hbase.regionserver.HRegion.execService(HRegion.java:8011)
        at 
org.apache.hadoop.hbase.regionserver.RSRpcServices.execServiceOnRegion(RSRpcServices.java:2409)
        at 
org.apache.hadoop.hbase.regionserver.RSRpcServices.execService(RSRpcServices.java:2391)
        at 
org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:42010)
        at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:409)
        at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:130)
        at 
org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:324)
        at 
org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:304)

{noformat}

The above is encountered as a result of a call to _getVersion_ from 
_ConnectionQueryServicesImpl#checkClientServerCompatibility_, but can occur 
from any place that we check client-server compatibility. 
The exception bubbles up as an *INCOMPATIBLE_CLIENT_SERVER_JAR* exception, 
which is wrong and also leads to misleading logs for clients.



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