I'm running an EMR Activity inside a Data Pipeline analyzing log files and I get the following error when my Pipeline fails:
Exception in thread "main" org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory hdfs://10.208.42.127:9000/home/hadoop/temp-output-s3copy already exists
at org.apache.hadoop.mapred.FileOutputFormat.checkOutputSpecs(FileOutputFormat.java:121)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:944)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:905)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1132)
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:905)
at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:879)
at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1316)
at com.valtira.datapipeline.stream.CloudFrontStreamLogProcessors.main(CloudFrontStreamLogProcessors.java:216)
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:187)
How can I delete that folder from Hadoop?
When you say delete from Hadoop, you really mean delete from HDFS.
To delete something from HDFS do one of the two
From the command line:
hadoop dfs -rmr hdfs://path/to/file
hdfs dfs -rm -r hdfs://path/to/file
Or from java:
FileSystem fs = FileSystem.get(getConf());
fs.delete(new Path("path/to/file"), true); // delete file, true for recursive