[jira] [Created] (MAPREDUCE-6289) libjars are assumed to be in the DistributedCache but are never added

["Sebastian Just (JIRA)" <ji...@apache.org>]

Sebastian Just created MAPREDUCE-6289:
-----------------------------------------

             Summary: libjars are assumed to be in the DistributedCache but are never added
                 Key: MAPREDUCE-6289
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6289
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: distributed-cache
    Affects Versions: 2.6.0
            Reporter: Sebastian Just


Used version:
{noformat}$ hadoop version
Hadoop 2.6.0
Subversion https://git-wip-us.apache.org/repos/asf/hadoop.git -r e3496499ecb8d220fba99dc5ed4c99c8f9e33bb1
Compiled by jenkins on 2014-11-13T21:10Z
Compiled with protoc 2.5.0
>From source with checksum 18e43357c8f927c0695f1e9522859d6a
This command was run using /usr/local/Cellar/hadoop/2.6.0/libexec/share/hadoop/common/hadoop-common-2.6.0.jar{noformat}

Having a pseudo-distributed setup with the worker node on the same machine as the master, no libjars are ever copied on the DFS but the following code assumes so resulting in {{FileNotFoundException}} s:

The issue starts in {{org.apache.hadoop.mapreduce.JobSubmitter.copyAndConfigureFiles(Job, Path, short)}} in this block: 
{code:java}    if (libjars != null) {
      FileSystem.mkdirs(jtFs, libjarsDir, mapredSysPerms);
      String[] libjarsArr = libjars.split(",");
      for (String tmpjars: libjarsArr) {
        Path tmp = new Path(tmpjars);
        Path newPath = copyRemoteFiles(libjarsDir, tmp, conf, replication);
        DistributedCache.addFileToClassPath(
            new Path(newPath.toUri().getPath()), conf);
      }
    }{code}
# For "local files" - as all libjars are in a pseudo-distributed setup {{copyRemoteFiles}} returns the path itself - including the {{file://}} URI but not coping the file to the DFS itself.
# This URI is stripped while creating the new {{Path}} object.
# Within the {{DistributedCache}}, the "current filesystem" is used to restore the URI in {{org.apache.hadoop.mapreduce.filecache.DistributedCache.addFileToClassPath(Path, Configuration, FileSystem)}}
#* which is now the DFS itself.

This causes i.e. {{file:/usr/local/Cellar/hbase/1.0.0/libexec/lib/hbase-client-1.0.0.jar}} to be added to the Distributed Cache as {{hdfs://localhost:8020/usr/local/Cellar/hbase/1.0.0/libexec/lib/hbase-client-1.0.0.jar}} - whereas it was never uploaded by {{copyRemoteFiles}} .

During verification afterwards this causes a {{FileNotFoundException}} :
{noformat}15/03/23 21:08:42 INFO mapreduce.JobSubmitter: Cleaning up the staging area file:/Users/sme/development/hadoop-data/mapred/staging/sme1224959894/.staging/job_local1224959894_0001
java.io.FileNotFoundException: File does not exist: hdfs://localhost:8020/usr/local/Cellar/hadoop/2.6.0/libexec/share/hadoop/common/lib/guava-11.0.2.jar
	at org.apache.hadoop.hdfs.DistributedFileSystem$18.doCall(DistributedFileSystem.java:1122)
	at org.apache.hadoop.hdfs.DistributedFileSystem$18.doCall(DistributedFileSystem.java:1114)
	at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
	at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1114)
	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:99)
	at org.apache.hadoop.mapreduce.filecache.ClientDistributedCacheManager.determineTimestampsAndCacheVisibilities(ClientDistributedCacheManager.java:57)
	at org.apache.hadoop.mapreduce.JobSubmitter.copyAndConfigureFiles(JobSubmitter.java:269)
	at org.apache.hadoop.mapreduce.JobSubmitter.copyAndConfigureFiles(JobSubmitter.java:390)
	at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:483)
	at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1296)
	at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1293)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:422)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
	at org.apache.hadoop.mapreduce.Job.submit(Job.java:1293)
	at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1314)
	at com.sungard.advtech.bigtable.hbase.FixMessageMapOnlyImporter.main(FixMessageMapOnlyImporter.java:232)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:71)
	at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:144)
	at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:152)
	at com.sungard.advtech.bigtable.hbase.HadoopDriver.main(HadoopDriver.java:19)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
{noformat}



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