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Posted to dev@click.apache.org by "William Watson (JIRA)" <ji...@apache.org> on 2014/08/01 22:23:39 UTC
[jira] [Closed] (CLK-809) LocalDistributedCacheManager for
concurrent sqoop processes fails to create unique directories
[ https://issues.apache.org/jira/browse/CLK-809?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
William Watson closed CLK-809.
------------------------------
Resolution: Not a Problem
closing b/c I stupidly put this ticket in the wrong project
> LocalDistributedCacheManager for concurrent sqoop processes fails to create unique directories
> ----------------------------------------------------------------------------------------------
>
> Key: CLK-809
> URL: https://issues.apache.org/jira/browse/CLK-809
> Project: Click
> Issue Type: Bug
> Components: core
> Reporter: William Watson
>
> Kicking off many sqoop processes in different threads results in:
> {code}
> 2014-08-01 13:47:24 -0400: INFO - 14/08/01 13:47:22 ERROR tool.ImportTool: Encountered IOException running import job: java.io.IOException: java.util.concurrent.ExecutionException: java.io.IOException: Rename cannot overwrite non empty destination directory /tmp/hadoop-hadoop/mapred/local/1406915233073
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.hadoop.mapred.LocalDistributedCacheManager.setup(LocalDistributedCacheManager.java:149)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.hadoop.mapred.LocalJobRunner$Job.<init>(LocalJobRunner.java:163)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.hadoop.mapred.LocalJobRunner.submitJob(LocalJobRunner.java:731)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:432)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1285)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1282)
> 2014-08-01 13:47:24 -0400: INFO - at java.security.AccessController.doPrivileged(Native Method)
> 2014-08-01 13:47:24 -0400: INFO - at javax.security.auth.Subject.doAs(Subject.java:415)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.hadoop.mapreduce.Job.submit(Job.java:1282)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1303)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.sqoop.mapreduce.ImportJobBase.doSubmitJob(ImportJobBase.java:186)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.sqoop.mapreduce.ImportJobBase.runJob(ImportJobBase.java:159)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.sqoop.mapreduce.ImportJobBase.runImport(ImportJobBase.java:239)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.sqoop.manager.SqlManager.importQuery(SqlManager.java:645)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:415)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:502)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.sqoop.Sqoop.run(Sqoop.java:145)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:181)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.sqoop.Sqoop.runTool(Sqoop.java:220)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.sqoop.Sqoop.runTool(Sqoop.java:229)
> 2014-08-01 13:47:24 -0400: INFO - at org.apache.sqoop.Sqoop.main(Sqoop.java:238)
> {code}
> If two are kicked off in the same second. The issue is the following lines of code in the org.apache.hadoop.mapred.LocalDistributedCacheManager class:
> {code}
> // Generating unique numbers for FSDownload.
> AtomicLong uniqueNumberGenerator =
> new AtomicLong(System.currentTimeMillis());
> {code}
> and
> {code}
> Long.toString(uniqueNumberGenerator.incrementAndGet())),
> {code}
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