[HIVE-5285] Custom SerDes throw cast exception when there are complex nested structures containing NonSettableObjectInspectors.

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.11.1
• Fix Version/s: 0.12.0
• Assignee: Hari Sankar Sivarama Subramaniyan
• Reporter: Hari Sankar Sivarama Subramaniyan
• Created: 12/Sep/13 20:58
• Updated: 15/Oct/13 23:31
• Resolved: 17/Sep/13 14:33

Description

The approach for HIVE-5199 fix is correct.However, the fix for HIVE-5199 is incomplete. Consider a complex nested structure containing the following object inspector hierarchy:
SettableStructObjectInspector
{
ListObjectInspector<NonSettableStructObjectInspector>
}

In the above case, the cast exception can happen via MapOperator/FetchOperator as below:
java.io.IOException: java.lang.ClassCastException: com.skype.data.hadoop.hive.proto.CustomObjectInspector cannot be cast to org.apache.hadoop.hive.serde2.objectinspector.SettableMapObjectInspector
at org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:545)
at org.apache.hadoop.hive.ql.exec.FetchOperator.pushRow(FetchOperator.java:489)
at org.apache.hadoop.hive.ql.exec.FetchTask.fetch(FetchTask.java:136)
at org.apache.hadoop.hive.ql.Driver.getResults(Driver.java:1412)
at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:271)
at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:216)
at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:413)
at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:756)
at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:614)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.RunJar.main(RunJar.java:160)
Caused by: java.lang.ClassCastException: com.skype.data.whaleshark.hadoop.hive.proto.ProtoMapObjectInspector cannot be cast to org.apache.hadoop.hive.serde2.objectinspector.SettableMapObjectInspector
at org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters.getConverter(ObjectInspectorConverters.java:144)
at org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters$StructConverter.<init>(ObjectInspectorConverters.java:294)
at org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters.getConverter(ObjectInspectorConverters.java:138)
at org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters$ListConverter.convert(ObjectInspectorConverters.java:251)
at org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters$StructConverter.convert(ObjectInspectorConverters.java:316)
at org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:529)
... 13 more