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William Watson commented on HADOOP-10924: ----------------------------------------- Sorry, trying to get back to this, just have been dealing with production issues. > LocalDistributedCacheManager for concurrent sqoop processes fails to create > unique directories > ---------------------------------------------------------------------------------------------- > > Key: HADOOP-10924 > URL: https://issues.apache.org/jira/browse/HADOOP-10924 > Project: Hadoop Common > Issue Type: Bug > Reporter: William Watson > Assignee: William Watson > Labels: BB2015-05-TBR > Attachments: HADOOP-10924.02.patch, > HADOOP-10924.03.jobid-plus-uuid.patch > > > 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} -- This message was sent by Atlassian JIRA (v6.3.4#6332)