[HIVE-6117] mapreduce.RecordReader instance needs to be initialized

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.13.0
• Component/s: HBase Handler
• Assignee: Nick Dimiduk
• Reporter: Nick Dimiduk
• Created: 27/Dec/13 19:46
• Updated: 30/Dec/13 17:47
• Resolved: 30/Dec/13 14:54

Description

The HBase storage handler makes use of a mapreduce.RecordReader instance but does not initialize it when consumed from local context. This results in a NPE for some queries, for instance

create table hbase_1(key string, age int) stored by 'org.apache.hadoop.hive.hbase.HBaseStorageHandler' with serdeproperties ( "hbase.columns.mapping" = "info:age");
insert overwrite table hbase_1 select name, SUM(age) from studenttab10k group by name;
select * from hbase_1;

The select statement throws the following exception

13/12/18 01:30:32 ERROR CliDriver: Failed with exception java.io.IOException:java.lang.NullPointerException
java.io.IOException: java.lang.NullPointerException
at org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:551)
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:1494)
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.processLine(CliDriver.java:348)
at org.apache.hadoop.hive.cli.CliDriver.processReader(CliDriver.java:446)
at org.apache.hadoop.hive.cli.CliDriver.processFile(CliDriver.java:456)
at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:737)
at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:675)
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:212)
Caused by: java.lang.NullPointerException
at org.apache.hadoop.hbase.mapreduce.TableRecordReaderImpl.nextKeyValue(TableRecordReaderImpl.java:196)
at org.apache.hadoop.hbase.mapreduce.TableRecordReader.nextKeyValue(TableRecordReader.java:138)
at org.apache.hadoop.hive.hbase.HiveHBaseTableInputFormat$1.next(HiveHBaseTableInputFormat.java:234)
at org.apache.hadoop.hive.hbase.HiveHBaseTableInputFormat$1.next(HiveHBaseTableInputFormat.java:193)
at org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:521)

Issue Links

• relates to: HBASE-9791 MR initializes scanner twice