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From "Sebastian Just (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6289) libjars are assumed to be in the DistributedCache but are never added in pseudo distributed mode
Date Tue, 24 Mar 2015 13:43:53 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14377854#comment-14377854
] 

Sebastian Just commented on MAPREDUCE-6289:
-------------------------------------------

The issue looks like a duplicate to MAPREDUCE-6238 whereas the entry point is a little bit
different.
I add the JARs not (all) via {{-libjars}} but via  {{TableMapReduceUtil.initTableReducerJob}}
(HBase code) - which ends up in the same JobConfiguration property as the command line argument.

> libjars are assumed to be in the DistributedCache but are never added in pseudo distributed
mode
> ------------------------------------------------------------------------------------------------
>
>                 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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