Shriya Gupta created HDFS-12688: ----------------------------------- Summary: HDFS File Not Removed Despite Successful "Moved to .Trash" Message Key: HDFS-12688 URL: https://issues.apache.org/jira/browse/HDFS-12688 Project: Hadoop HDFS Issue Type: Bug Components: hdfs Affects Versions: 2.6.0 Reporter: Shriya Gupta Priority: Critical
Wrote a simple script to delete and create a file and ran it multiple times. However, some executions of the script randomly threw a FileAlreadyExists error while the others succeeded despite successful hdfs dfs -rm command. The script is as below, I have reproduced it in two different environments -- hdfs dfs -ls /user/shriya/shell_test/ echo "starting hdfs remove **************" hdfs dfs -rm -r -f /user/shriya/shell_test/wordcountOutput echo "hdfs compeleted!" hdfs dfs -ls /user/shriya/shell_test/ echo "starting mapReduce*******************************" mapred job -libjars /data/home/shriya/shell_test/hadoop-mapreduce-client-jobclient-2.7.1.jar -submit /data/home/shriya/shell_test/wordcountJob.xml The message confirming successful move -- 17/10/19 14:49:12 INFO fs.TrashPolicyDefault: Moved: 'hdfs://nameservice1/user/shriya/shell_test/wordcountOutput' to trash at: hdfs://nameservice1/user/shriya/.Trash/Current/user/shriya/shell_test/wordcountOutput1508438952728 The contents of subsequent -ls after -rm also showed that the file still existed) The error I got when my MapReduce job tried to create the file -- 17/10/19 14:50:00 WARN security.UserGroupInformation: PriviledgedActionException as:<REDACTED> (auth:KERBEROS) cause:org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory hdfs://nameservice1/user/shriya/shell_test/wordcountOutput already exists Exception in thread "main" org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory hdfs://nameservice1/user/shriya/shell_test/wordcountOutput already exists at org.apache.hadoop.mapred.FileOutputFormat.checkOutputSpecs(FileOutputFormat.java:131) at org.apache.hadoop.mapreduce.JobSubmitter.checkSpecs(JobSubmitter.java:272) at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:143) at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1307) at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1304) 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:1920) at org.apache.hadoop.mapreduce.Job.submit(Job.java:1304) at org.apache.hadoop.mapreduce.tools.CLI.run(CLI.java:315) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84) at org.apache.hadoop.mapred.JobClient.main(JobClient.java:1277) -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-dev-h...@hadoop.apache.org