[HBASE-9510] Namespace operations should throw clean exceptions

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.98.0, 0.96.0
• Component/s: master
• Hadoop Flags: Reviewed
• Assignee: Enis Soztutar
• Reporter: Enis Soztutar
• Created: 11/Sep/13 21:01
• Updated: 20/Nov/15 11:52
• Resolved: 17/Sep/13 05:47

Description

Some of the namespace operations does not throw clean exceptions mimicking table exceptions (TableNotFoundException, etc).

For example:

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

We can clean up the exceptions thrown from ns commands.