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https://issues.apache.org/jira/browse/HADOOP-14600?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ping Liu updated HADOOP-14600:
------------------------------
Attachment: HADOOP-14600.004.patch
=> Fixed license issue
- added ASF license header to newly added Helper.java
=> Fixed deprecation issue
- added Suppression anotation in
TestRawLocalFileSystemContract.testPermission()
=> Fixed leftover test directory and file, which should have be cleaned up
- changed to use test base directory (getTestBaseDir()) in
TestRawLocalFileSystemContract.testPermission()
- this directory will be automatically recycled in tearDown()
Please note that there are totally three test failures as follows.
{quote}Tests in error:
TestKDiag.testKeytabAndPrincipal:162->kdiag:119 ? KerberosAuth Login failure
f...
TestKDiag.testFileOutput:186->kdiag:119 ? KerberosAuth Login failure for
user:...
TestKDiag.testLoadResource:196->kdiag:119 ? KerberosAuth Login failure for
use...
Tests run: 3927, Failures: 0, Errors: 3, Skipped: 206{quote}
The failures are all from TestKDiag which is not related to HADOOP-14600.
> LocatedFileStatus constructor forces RawLocalFS to exec a process to get the
> permissions
> ----------------------------------------------------------------------------------------
>
> Key: HADOOP-14600
> URL: https://issues.apache.org/jira/browse/HADOOP-14600
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 2.7.3
> Environment: file:// in a dir with many files
> Reporter: Steve Loughran
> Assignee: Ping Liu
> Attachments: HADOOP-14600.001.patch, HADOOP-14600.002.patch,
> HADOOP-14600.003.patch, HADOOP-14600.004.patch,
> TestRawLocalFileSystemContract.java
>
>
> Reported in SPARK-21137. a {{FileSystem.listStatus}} call really craws
> against the local FS, because {{FileStatus.getPemissions}} call forces
> {{DeprecatedRawLocalFileStatus}} tp spawn a process to read the real UGI
> values.
> That is: for every other FS, what's a field lookup or even a no-op, on the
> local FS it's a process exec/spawn, with all the costs. This gets expensive
> if you have many files.
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