Hive map-join throws error !!
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Key: HIVE-2951
URL: https://issues.apache.org/jira/browse/HIVE-2951
Project: Hive
Issue Type: Bug
Affects Versions: 0.7.0
Reporter: nago n
I get this below message. What does this mean ? What is really leading for this
issue ? what should i do to resolve this ? i use joins in the query as if ( A
left outer join B left outer join C lefit out join D ) . whereas A is the Big
table.
FAILED: Execution Error, return code 1 from
org.apache.hadoop.hive.ql.exec.MapredLocalTask
ATTEMPT: Execute BackupTask: org.apache.hadoop.hive.ql.exec.MapRedTask
I set manual properties :
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set hive.mapjoin.localtask.max.memory.usage = 0.9;
set hive.auto.convert.join = true;
set hive.smalltable.filesize = 30000000;
the default configuration is :
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mapred.child.java.opts : -Xmx2400m -XX:+UseConcMarkSweepGC -XX:
+UseParNewGC -XX:+CMSParallelRemarkEnabled -X:-UseAdaptiveSizePolicy -
XX:+DisableExplicitGC
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