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https://issues.apache.org/jira/browse/MAPREDUCE-6846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15858637#comment-15858637
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Chris Trezzo edited comment on MAPREDUCE-6846 at 2/8/17 10:40 PM:
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Unfortunately, it looks like wildcards was implemented on top of this bug (see
MAPREDUCE-6719). Fixing this so that fragments are honored might be a little
tricky when wildcards are being used because you would lose the per-path
fragment information.
I can see two potential approaches so far:
# Only use a wildcard when there have been no fragments specified by the user.
This would preserve the intended naming of resources, but would reduce the
number of instances where wildcards could be used.
# Silently ignore fragments specified by libjars when wildcards are enabled - I
am not a fan of this approach because the application could be expecting a
specific resource name for libjars so that symlinks don't conflict when
resources are localized.
I will start working on a v1 patch for #1. Thoughts [~templedf] and [~sjlee0]?
was (Author: ctrezzo):
Unfortunately, it looks like wildcards was implemented on top of this bug (see
MAPREDUCE-6719). Fixing this so that fragments are honored might be a little
tricky when wildcards are being used because you would lose the per-path
fragment information.
I can see two potential approaches so far:
# Only use a wildcard when there have been no fragments specified by the user.
This would preserve the intended naming of resources, but would reduce the
number of instances where wildcards could be used.
# Silently ignore fragments specified by libjars - I am not a fan of this
approach because the application could be expecting a specific resource name
for libjars so that symlinks don't conflict when resources are localized.
I will start working on a v1 patch for #1. Thoughts [~templedf] and [~sjlee0]?
> Fragments specified for libjar paths are not handled correctly
> --------------------------------------------------------------
>
> Key: MAPREDUCE-6846
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6846
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 2.7.3, 3.0.0-alpha2
> Reporter: Chris Trezzo
> Assignee: Chris Trezzo
> Priority: Minor
>
> If a user specifies a fragment for a libjars path via generic options parser,
> the client crashes with a FileNotFoundException:
> {noformat}
> java.io.FileNotFoundException: File file:/home/mapred/test.txt#testFrag.txt
> does not exist
> at
> org.apache.hadoop.fs.RawLocalFileSystem.deprecatedGetFileStatus(RawLocalFileSystem.java:638)
> at
> org.apache.hadoop.fs.RawLocalFileSystem.getFileLinkStatusInternal(RawLocalFileSystem.java:864)
> at
> org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:628)
> at
> org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:442)
> at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:363)
> at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:314)
> at
> org.apache.hadoop.mapreduce.JobResourceUploader.copyRemoteFiles(JobResourceUploader.java:387)
> at
> org.apache.hadoop.mapreduce.JobResourceUploader.uploadLibJars(JobResourceUploader.java:154)
> at
> org.apache.hadoop.mapreduce.JobResourceUploader.uploadResources(JobResourceUploader.java:105)
> at
> org.apache.hadoop.mapreduce.JobSubmitter.copyAndConfigureFiles(JobSubmitter.java:102)
> at
> org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:197)
> at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1344)
> at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1341)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1892)
> at org.apache.hadoop.mapreduce.Job.submit(Job.java:1341)
> at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1362)
> at
> org.apache.hadoop.examples.QuasiMonteCarlo.estimatePi(QuasiMonteCarlo.java:306)
> at
> org.apache.hadoop.examples.QuasiMonteCarlo.run(QuasiMonteCarlo.java:359)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
> at
> org.apache.hadoop.examples.QuasiMonteCarlo.main(QuasiMonteCarlo.java:367)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:71)
> at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:144)
> at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:74)
> 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:498)
> at org.apache.hadoop.util.RunJar.run(RunJar.java:239)
> at org.apache.hadoop.util.RunJar.main(RunJar.java:153)
> {noformat}
> This is actually inconsistent with the behavior for files and archives. Here
> is a table showing the current behavior for each type of path and resource:
> | || Qualified path (i.e. file://home/mapred/test.txt#frag.txt) || Absolute
> path (i.e. /home/mapred/test.txt#frag.txt) || Relative path (i.e.
> test.txt#frag.txt) ||
> || -libjars | FileNotFound | FileNotFound|FileNotFound|
> || -files | (/) | (/) | (/) |
> || -archives | (/) | (/) | (/) |
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