[HIVE-5492] Explain query fails with NPE if a client doesn't call getResultSetSchema()

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.11.0
• Fix Version/s: 0.13.0
• Component/s: Thrift API
• Assignee: Xuefu Zhang
• Reporter: Xuefu Zhang
• Created: 08/Oct/13 21:45
• Updated: 16/Oct/13 17:07
• Resolved: 15/Oct/13 18:25

Description

If a thrift client makes an explain query and fetches results without calling getResultSetSchema() first, NullPointerException will occur in Hive.

org.apache.hive.service.cli.HiveSQLException: java.lang.NullPointerException
        at org.apache.hive.service.cli.operation.SQLOperation.getNextRowSet(SQLOperation.java:262)
        at org.apache.hive.service.cli.operation.OperationManager.getOperationNextRowSet(OperationManager.java:179)
        at org.apache.hive.service.cli.session.HiveSessionImpl.fetchResults(HiveSessionImpl.java:422)
        at org.apache.hive.service.cli.CLIService.fetchResults(CLIService.java:333)
        at org.apache.hive.service.cli.thrift.ThriftCLIService.FetchResults(ThriftCLIService.java:413)
        at org.apache.hive.service.cli.thrift.TCLIService$Processor$FetchResults.getResult(TCLIService.java:1613)
        at org.apache.hive.service.cli.thrift.TCLIService$Processor$FetchResults.getResult(TCLIService.java:1598)
        at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
        at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
        at org.apache.hive.service.auth.TUGIContainingProcessor$1.run(TUGIContainingProcessor.java:40)
        at org.apache.hive.service.auth.TUGIContainingProcessor$1.run(TUGIContainingProcessor.java:37)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1477)
        at org.apache.hadoop.hive.shims.HadoopShimsSecure.doAs(HadoopShimsSecure.java:527)
        at org.apache.hive.service.auth.TUGIContainingProcessor.process(TUGIContainingProcessor.java:37)
        at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:244)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:724)
Caused by: java.lang.NullPointerException
        at org.apache.hive.service.cli.Row.<init>(Row.java:45)
        at org.apache.hive.service.cli.RowSet.addRow(RowSet.java:61)
        at org.apache.hive.service.cli.operation.SQLOperation.getNextRowSet(SQLOperation.java:254)
        ... 19 more