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Posted to issues@tez.apache.org by "Jacob Tolar (Jira)" <ji...@apache.org> on 2019/09/11 22:13:00 UTC
[jira] [Updated] (TEZ-4084) Tez local mode fails when distributed
cache creates link with parent
[ https://issues.apache.org/jira/browse/TEZ-4084?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jacob Tolar updated TEZ-4084:
-----------------------------
Attachment: TEZ-4084.2.patch
> Tez local mode fails when distributed cache creates link with parent
> --------------------------------------------------------------------
>
> Key: TEZ-4084
> URL: https://issues.apache.org/jira/browse/TEZ-4084
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: Jacob Tolar
> Assignee: Jacob Tolar
> Priority: Minor
> Attachments: TEZ-4084.1.patch, TEZ-4084.2.patch
>
>
> If you configure distributed cache with 'target#parent/link' in Tez Local Mode, the file cannot be created and the job fails:
> {code:java}
> java.lang.IllegalArgumentException: Invalid prefix or suffix
> at java.nio.file.TempFileHelper.generatePath(TempFileHelper.java:63)
> at java.nio.file.TempFileHelper.create(TempFileHelper.java:127)
> at java.nio.file.TempFileHelper.createTempDirectory(TempFileHelper.java:173)
> at java.nio.file.Files.createTempDirectory(Files.java:950)
> at org.apache.tez.dag.app.launcher.TezLocalCacheManager.localize(TezLocalCacheManager.java:103) {code}
>
> I propose:
> # Ensure the prefix is always valid (e.g. no path separators in it) when creating the temporary copy of the file in TezLocalCacheManager
> # Update tez local mode to behave the same way as mapreduce local mode in this scenario. Mapreduce local mode also doesn't support these types of links (links with a parent directory specified), but if it encounters them it is a soft failure (WARN log message) not a job failure.
>
> It is somewhat trickier to correctly support cache files linked with a nonexistent parent; if that feature is required it can be done as a separate JIRA.
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