Hi,
Wordcount example which shipped with hadoop, expects the output directory
not exists and if one exists (due to previous session), it throws the error
like this..
org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory output
already exists
at
org.apache.hadoop.mapreduce.lib.output.FileOutputFormat.checkOutputSpecs(FileOutputFormat.java:134)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:830)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:791)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:416)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
at
org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:791)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:465)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:494)
at org.apache.hadoop.examples.WordCount.main(WordCount.java:67)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
It would nice to let the example warn and ask for overwrite permission
rather throwing this error and stopping.
Regards,
Raja Nagendra Kumar,
C.T.O
www.tejasoft.com
Services 3.0 - Beyond Bodies and CV Selling.
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