[HIVE-7473] Null values in DECIMAL columns cause serialization issues with HCatalog

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.13.1
• Fix Version/s: 0.14.0
• Component/s: Serializers/Deserializers
• Assignee: Craig Condit
• Reporter: Craig Condit
• Created: 22/Jul/14 19:35
• Updated: 13/Nov/14 19:41
• Resolved: 28/Jul/14 01:53

Description

WritableHiveDecimalObjectInspector appears to be missing null checks in getPrimitiveWritableObject(Object) and getPrimitiveJavaObject(Object). The same checks do exist in WritableHiveVarcharObjectInspector.

Attempting to read from a table in HCatalog containing null values for decimal columns results in the following exception (Pig used here):

Error: org.apache.pig.backend.executionengine.ExecException: ERROR 6018: Error converting read value to tuple at
  org.apache.hive.hcatalog.pig.HCatBaseLoader.getNext(HCatBaseLoader.java:76) at
  org.apache.hive.hcatalog.pig.HCatLoader.getNext(HCatLoader.java:58) at
  org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigRecordReader.nextKeyValue(PigRecordReader.java:211) at
  org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:532) at
  org.apache.hadoop.mapreduce.task.MapContextImpl.nextKeyValue(MapContextImpl.java:80) at
  org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.nextKeyValue(WrappedMapper.java:91) at
  org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144) at
  org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:763) at
  org.apache.hadoop.mapred.MapTask.run(MapTask.java:339) at
  org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:162) 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:1491) at
  org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:157)
Caused by: java.lang.NullPointerException at 
  org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableHiveDecimalObjectInspector.getPrimitiveJavaObject(WritableHiveDecimalObjectInspector.java:43) at
  org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableHiveDecimalObjectInspector.getPrimitiveJavaObject(WritableHiveDecimalObjectInspector.java:26) at 
  org.apache.hive.hcatalog.data.HCatRecordSerDe.serializePrimitiveField(HCatRecordSerDe.java:269) at
  org.apache.hive.hcatalog.data.HCatRecordSerDe.serializeField(HCatRecordSerDe.java:192) at
  org.apache.hive.hcatalog.data.LazyHCatRecord.get(LazyHCatRecord.java:53) at
  org.apache.hive.hcatalog.data.LazyHCatRecord.get(LazyHCatRecord.java:97) at
  org.apache.hive.hcatalog.mapreduce.HCatRecordReader.nextKeyValue(HCatRecordReader.java:204) at
  org.apache.hive.hcatalog.pig.HCatBaseLoader.getNext(HCatBaseLoader.java:63)
  ... 13 more

Issue Links

• is related to: HIVE-7738 tez select sum(decimal) from union all of decimal and null throws NPE