[HIVE-10273] Union with partition tables which have no data fails with NPE

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.2.0
• Fix Version/s: 1.2.0
• Component/s: Tez
• Assignee: Vikram Dixit K
• Reporter: Vikram Dixit K
• Created: 09/Apr/15 01:25
• Updated: 18/May/15 21:47
• Resolved: 15/Apr/15 19:37

Description

As shown in the test case in the patch below, when we have partitioned tables which have no data, we fail with an NPE with the following stack trace:

NullPointerException null
java.lang.NullPointerException
  at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.walk(DefaultGraphWalker.java:128)
  at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.startWalking(DefaultGraphWalker.java:109)
  at org.apache.hadoop.hive.ql.optimizer.physical.Vectorizer$VectorizationDispatcher.validateMapWork(Vectorizer.java:357)
  at org.apache.hadoop.hive.ql.optimizer.physical.Vectorizer$VectorizationDispatcher.convertMapWork(Vectorizer.java:321)
  at org.apache.hadoop.hive.ql.optimizer.physical.Vectorizer$VectorizationDispatcher.dispatch(Vectorizer.java:307)
  at org.apache.hadoop.hive.ql.lib.TaskGraphWalker.dispatch(TaskGraphWalker.java:111)
  at org.apache.hadoop.hive.ql.lib.TaskGraphWalker.walk(TaskGraphWalker.java:194)
  at org.apache.hadoop.hive.ql.lib.TaskGraphWalker.startWalking(TaskGraphWalker.java:139)
  at org.apache.hadoop.hive.ql.optimizer.physical.Vectorizer.resolve(Vectorizer.java:847)
  at org.apache.hadoop.hive.ql.parse.TezCompiler.optimizeTaskPlan(TezCompiler.java:468)
  at org.apache.hadoop.hive.ql.parse.TaskCompiler.compile(TaskCompiler.java:223)
  at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:10170)
  at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:221)
  at org.apache.hadoop.hive.ql.parse.ExplainSemanticAnalyzer.analyzeInternal(ExplainSemanticAnalyzer.java:74)
  at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:221)