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https://issues.apache.org/jira/browse/HBASE-9510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13766190#comment-13766190
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Enis Soztutar commented on HBASE-9510:
--------------------------------------
bq. Since FSTableDescriptors.get() returns null on non-existent. Shouldn't we
be consistent and do the same.
TableNamespaceManager.get() returns null, if ns does not exists. The other
methods, remove(), update() throws exceptions. We cannot just return null from
them.
bq. Regarding listTablesByNS api. I think it should return non-existent
namespace exceptions. Else it seems to be masking an error?
Agreed. Made the change.
bq. change the delimiter used by tableNameFoo to use the constant
done.
> Namespace operations should throw clean exceptions
> --------------------------------------------------
>
> Key: HBASE-9510
> URL: https://issues.apache.org/jira/browse/HBASE-9510
> Project: HBase
> Issue Type: Bug
> Components: master
> Reporter: Enis Soztutar
> Assignee: Enis Soztutar
> Fix For: 0.98.0, 0.96.0
>
> Attachments: hbase-9510_v1.patch, hbase-9510_v2.patch,
> hbase-9510_v3.patch
>
>
> Some of the namespace operations does not throw clean exceptions mimicking
> table exceptions (TableNotFoundException, etc).
> For example:
> {code}
> hbase(main):007:0> describe_namespace 'non_existing_namespace'
> ERROR: java.io.IOException
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2117)
> at
> org.apache.hadoop.hbase.ipc.RpcServer$CallRunner.run(RpcServer.java:1816)
> at
> org.apache.hadoop.hbase.ipc.SimpleRpcScheduler.consumerLoop(SimpleRpcScheduler.java:165)
> at
> org.apache.hadoop.hbase.ipc.SimpleRpcScheduler.access$0(SimpleRpcScheduler.java:161)
> at
> org.apache.hadoop.hbase.ipc.SimpleRpcScheduler$1.run(SimpleRpcScheduler.java:113)
> at java.lang.Thread.run(Thread.java:680)
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.protobuf.ProtobufUtil.toProtoNamespaceDescriptor(ProtobufUtil.java:2138)
> at
> org.apache.hadoop.hbase.master.HMaster.getNamespaceDescriptor(HMaster.java:3029)
> at
> org.apache.hadoop.hbase.protobuf.generated.MasterAdminProtos$MasterAdminService$2.callBlockingMethod(MasterAdminProtos.java:32904)
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2079)
> ... 5 more
> {code}
> We can clean up the exceptions thrown from ns commands.
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