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From Remus Rusanu <rem...@microsoft.com>
Subject HowTo: Debugging/Running localmode on YARN ?
Date Tue, 19 Nov 2013 12:58:02 GMT
Hello all,

I just discovered that with 23 shims the localmode is driven by

SET  mapreduce.framework.name=local;

not by the traditional SET mapred.job.tracker=local; Has anyone put together a how-to for
debugging/running localmode on Yarn, like Thejas had for classic Hadoop at http://hadoop-pig-hive-thejas.blogspot.ie/2013/04/running-hive-in-local-mode.html
?

My specific issue is that on localmode I get error launching the job due to missing HDFS file:

java.io.FileNotFoundException: File does not exist: hdfs://sandbox.hortonworks.com:8020/usr/lib/hcatalog/share/hcatalog/hcatalog-core.jar
        at org.apache.hadoop.hdfs.DistributedFileSystem$17.doCall(DistributedFileSystem.java:1110)
        at org.apache.hadoop.hdfs.DistributedFileSystem$17.doCall(DistributedFileSystem.java:1102)
        at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
        at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1102)
        at org.apache.hadoop.mapreduce.filecache.ClientDistributedCacheManager.getFileStatus(ClientDistributedCacheManager.java:288)
        at org.apache.hadoop.mapreduce.filecache.ClientDistributedCacheManager.getFileStatus(ClientDistributedCacheManager.java:224)
        at org.apache.hadoop.mapreduce.filecache.ClientDistributedCacheManager.determineTimestamps(ClientDistributedCacheManager.java:93)
        at org.apache.hadoop.mapreduce.filecache.ClientDistributedCacheManager.determineTimestampsAndCacheVisibilities(ClientDistributedCacheManager.java:57)
        at org.apache.hadoop.mapreduce.JobSubmitter.copyAndConfigureFiles(JobSubmitter.java:264)
        at org.apache.hadoop.mapreduce.JobSubmitter.copyAndConfigureFiles(JobSubmitter.java:300)
        at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:387)
        at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1268)
        at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1265)
        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:1491)
        at org.apache.hadoop.mapreduce.Job.submit(Job.java:1265)
        at org.apache.hadoop.mapred.JobClient$1.run(JobClient.java:562)
        at org.apache.hadoop.mapred.JobClient$1.run(JobClient.java:557)
        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:1491)
        at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:557)
        at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:548)
        at org.apache.hadoop.hive.ql.exec.mr.ExecDriver.execute(ExecDriver.java:433)
        at org.apache.hadoop.hive.ql.exec.mr.ExecDriver.main(ExecDriver.java:741)
        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:212)

Changing SET fs.default.name=file:///tmp; 'solves' the error, but I'm a bit confused why using
the (valid and running!) HDFS does not work. It seems to me that the HDFS resource in question
is just a concat of the default FS with a localpath, not a valid HDFS name...

Thanks,
~Remus

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