[HIVE-5199] Custom SerDe containing a nonSettable complex data type row object inspector throws cast exception with HIVE 0.11

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.11.0
• Fix Version/s: 0.12.0
• Assignee: Hari Sankar Sivarama Subramaniyan
• Reporter: Hari Sankar Sivarama Subramaniyan
• Created: 03/Sep/13 20:40
• Updated: 15/Oct/13 23:31
• Resolved: 09/Sep/13 15:17

Description

The issue happens because of the changes in HIVE-3833.

Consider a partitioned table with different custom serdes for the partition and tables. The serde at table level, say, customSerDe1's object inspector is of settableDataType where as the serde at partition level, say, customSerDe2's object inspector is of nonSettableDataType. The current implementation introduced by HIVE-3833 does not convert nested Complex Data Types which extend nonSettableObjectInspector to a settableObjectInspector type inside ObjectInspectorConverters.getConvertedOI(). However, it tries to typecast the nonSettableObjectInspector to a settableObjectInspector inside ObjectInspectorConverters.getConverter(ObjectInspector inputOI, ObjectInspector outputOI).

The attached patch HIVE-5199.2.patch.txt contains a stand-alone test case.

The below exception can happen via FetchOperator as well as MapOperator.
For example, consider the FetchOperator.
Inside FetchOperator consider the following call:
getRecordReader()->ObjectInspectorConverters. getConverter()

The stack trace as follows:
2013-08-28 17:57:25,307 ERROR CliDriver (SessionState.java:printError(432)) - Failed with exception java.io.IOException:java.lang.ClassCastException: com.skype.data.whaleshark.hadoop.hive.proto.ProtoMapObjectInspector cannot be cast to org.apache.hadoop.hive.serde2.objectinspector.SettableMapObjectInspector
java.io.IOException: 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.ql.exec.FetchOperator.getNextRow(FetchOperator.java:544)
at org.apache.hadoop.hive.ql.exec.FetchOperator.pushRow(FetchOperator.java:488)
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:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
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:307)
at org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters.getConverter(ObjectInspectorConverters.java:138)
at org.apache.hadoop.hive.ql.exec.FetchOperator.getRecordReader(FetchOperator.java:406)
at org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:508)