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From "Robert Justice (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-4693) If you set hive.optimize.skewjoin=true, and number of identical keys is < hive.skewjoin.key don't fail with FileNotFoundException
Date Mon, 10 Jun 2013 14:26:20 GMT
Robert Justice created HIVE-4693:
------------------------------------

             Summary: If you set hive.optimize.skewjoin=true, and number of identical keys
is < hive.skewjoin.key don't fail with FileNotFoundException
                 Key: HIVE-4693
                 URL: https://issues.apache.org/jira/browse/HIVE-4693
             Project: Hive
          Issue Type: Improvement
          Components: Query Processor
    Affects Versions: 0.10.0
            Reporter: Robert Justice


We would like to set hive.optimize.skewjoin to true to use it when skew is encountered, but
if the number of identical keys is not met, it will crash due to not finding hive_skew_join_bigkeys_0.
 Could we just bail out and go back to a standard join rather than failing?

Ended Job = job_201306061640_0003
java.io.FileNotFoundException: File hdfs://nameservice1/tmp/hive-rjustice/hive_2013-06-07_10-02-03_755_605133549375679913/-mr-10003/hive_skew_join_bigkeys_0
does not exist.
	at org.apache.hadoop.hdfs.DistributedFileSystem.listStatus(DistributedFileSystem.java:410)
	at org.apache.hadoop.hive.ql.plan.ConditionalResolverSkewJoin.getTasks(ConditionalResolverSkewJoin.java:96)
	at org.apache.hadoop.hive.ql.exec.ConditionalTask.execute(ConditionalTask.java:81)
	at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:138)
	at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:57)
	at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1374)
	at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1160)
	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:973)
	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:893)
	at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:259)
	at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:216)
	at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:412)
	at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:759)
	at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:613)
	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:208)
Ended Job = 672729995, job is filtered out (removed at runtime).
MapReduce Jobs Launched: 

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