Jason Lowe created YARN-1386:
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Summary: NodeManager mistakenly loses resources and relocalizes
them
Key: YARN-1386
URL: https://issues.apache.org/jira/browse/YARN-1386
Project: Hadoop YARN
Issue Type: Bug
Components: nodemanager
Affects Versions: 2.2.0, 0.23.10
Reporter: Jason Lowe
Priority: Blocker
When a local resource that should already be present is requested again, the
nodemanager checks to see if it still present. However the method it uses to
check for presence is via File.exists() as the user of the nodemanager process.
If the resource was a private resource localized for another user, it will be
localized to a location that is not accessible by the nodemanager user.
Therefore File.exists() returns false, the nodemanager mistakenly believes the
resource is no longer available, and it proceeds to localize it over and over.
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