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org.apache.hadoop.hbase.NamespaceNotFoundException: crawler	at org.apache.hadoop.hbase.master.HMaster.ensureNamespaceExists(HMaster.java:2510)	at org.apache.hadoop.hbase.master.HMaster.createTable(HMaster.java:1499)	at org.apache.hadoop.hbase.master.MasterRpcServices.createTable(MasterRpcServices.java:463)	at org.apache.hadoop.hbase.protobuf.generated.MasterProtos$MasterService$2.callBlockingMethod(MasterProtos.java:55682)	at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2178)	at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:112)	at org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:133)	at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:108)