[HIVE-21185] insert overwrite directory ... stored as nontextfile raise exception with merge files open

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 2.1.1, 2.3.0
• Fix Version/s: 3.0.0
• Component/s: Query Planning
• Assignee: Unassigned
• Reporter: chengkun jia
• Created: 30/Jan/19 07:45
• Updated: 09/Apr/19 06:54
• Resolved: 09/Apr/19 06:54

Description

reproduce:

 

# init table with small files
create table multiple_small_files (id int);
insert into multiple_small_files values (1);
insert into multiple_small_files values (1);
insert into multiple_small_files values (1);
insert into multiple_small_files values (1);
insert into multiple_small_files values (1);
insert into multiple_small_files values (1);
insert into multiple_small_files values (1);
insert into multiple_small_files values (1);

# open small file merge
set hive.merge.mapfiles=true;
set hive.merge.mapredfiles=true;

insert overwrite directory '/path/to/hdfs' stored as avro
select * from multiple_small_files;

this will produce exception like:

Messages for this Task:Error: java.lang.RuntimeException: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while processing writable Objavro.schema�{"type":"record","name":"baseRecord","fields":[{"name":"_col0","type":["null","int"],"default":null}]}�$$����N���e(���                                                             �$$����N���e(��� at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.map(ExecMapper.java:169) at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:54) at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:453) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343) at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1671) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while processing writable Objavro.schema�{"type":"record","name":"baseRecord","fields":[{"name":"_col0","type":["null","int"],"default":null}]}�$$����N���e(���                                     �$$����N���e(��� at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:497) at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.map(ExecMapper.java:160) ... 8 moreCaused by: org.apache.hadoop.hive.serde2.avro.AvroSerdeException: Expecting a AvroGenericRecordWritable at org.apache.hadoop.hive.serde2.avro.AvroDeserializer.deserialize(AvroDeserializer.java:139) at org.apache.hadoop.hive.serde2.avro.AvroSerDe.deserialize(AvroSerDe.java:216) at org.apache.hadoop.hive.ql.exec.MapOperator$MapOpCtx.readRow(MapOperator.java:128) at org.apache.hadoop.hive.ql.exec.MapOperator$MapOpCtx.access$200(MapOperator.java:92) at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:488) ... 9 moreFAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.mr.MapRedTask

 

This issue not only affect avrofile format but all nontextfile storage format. The rootcause is hive get wrong input format in file merge stage