[HIVE-671] getSchema() does not work properly with select* queries on Hive Server

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Tags: Hive Server, schema
• Assignee: Unassigned
• Reporter: Eric Hwang
• Created: 22/Jul/09 06:13
• Updated: 06/Aug/09 01:13

Description

Running a select * query sometimes causes Null Pointer Exceptions in the Hive Server getSchema() method:

This is the Hive Server Error:

java.lang.NullPointerException
at com.facebook.serde2.hive_context.contextSerDe.initialize(contextSerDe.java:35)
at org.apache.hadoop.hive.ql.plan.tableDesc.getDeserializer(tableDesc.java:64)
at org.apache.hadoop.hive.ql.Driver.getSchema(Driver.java:119)
at org.apache.hadoop.hive.service.HiveServer$HiveServerHandler.getSchema(HiveServer.java:124)
at org.apache.hadoop.hive.service.ThriftHive$Processor$getSchema.process(ThriftHive.java:376)
at org.apache.hadoop.hive.service.ThriftHive$Processor.process(ThriftHive.java:252)
at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:252)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
09/07/21 22:58:53 ERROR service.HiveServer: java.lang.NullPointerException java.lang.NullPointerException
at com.facebook.serde2.hive_context.contextSerDe.initialize(contextSerDe.java:35)
at org.apache.hadoop.hive.ql.plan.tableDesc.getDeserializer(tableDesc.java:64)
at org.apache.hadoop.hive.ql.Driver.getSchema(Driver.java:119)
at org.apache.hadoop.hive.service.HiveServer$HiveServerHandler.getSchema(HiveServer.java:124)
at org.apache.hadoop.hive.service.ThriftHive$Processor$getSchema.process(ThriftHive.java:376)
at org.apache.hadoop.hive.service.ThriftHive$Processor.process(ThriftHive.java:252)
at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:252)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)

Also, select * queries sometimes cause the Hive Server getSchema() to omit the field used to partition the table.

This directly impacts the Hive ODBC driver (JIRA-187) and other sections that exercise the Hive Server.

Issue Links

• is depended upon by: HIVE-187 ODBC driver