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https://issues.apache.org/jira/browse/HADOOP-4173?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod K V updated HADOOP-4173:
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Attachment: HADOOP-4173-20080923.txt
For tasks' memory management feature, we read proc file system for finding the
running processes and reading their stat files. Linux programs access procfs
via VFS, but windows programs can access cygwin's procfs only if they work
directly under cygwin(i.e. talk to cygwin dll). The current problem arises
because of the inability of a windows java application(which, once started,
runs outside cygwin environment) to read proc file-system. My earlier sanity
checks for determining procfs availibilty on Windows/cygwin were just limited
to the command line and not included external programs, so couldn't catch this
problem earlier.
So, for now, I am attaching a patch to disable the feature completely on
Windows/Cygwin, and let it run only on Linux. Later, we can try including this
feature by changing - how we get list of processes(run a cygwin "ls" on /proc)
and how we get each process' information (run a cygwin "cat" on each process,
costly?).
> TestProcfsBasedProcessTree failing on Windows machine
> -----------------------------------------------------
>
> Key: HADOOP-4173
> URL: https://issues.apache.org/jira/browse/HADOOP-4173
> Project: Hadoop Core
> Issue Type: Bug
> Components: test, util
> Environment: Windows
> Reporter: Ramya R
> Assignee: Vinod K V
> Fix For: 0.19.0
>
> Attachments: HADOOP-4173-20080923.txt
>
>
> TestProcfsBasedProcessTree unit test is failing on Windows. Here is the
> output:
> [junit] Running org.apache.hadoop.util.TestProcfsBasedProcessTree
> [junit] 2008-09-14 21:39:24,354 INFO util.TestProcfsBasedProcessTree
> (TestProcfsBasedProcessTree.java:testProcessTree(121)) - Root process pid:
> 5512
> [junit] Tests run: 1, Failures: 0, Errors: 1, Time elapsed: 0.609 sec
> [junit] Test org.apache.hadoop.util.TestProcfsBasedProcessTree FAILED
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