Josh Elser created ACCUMULO-2174:
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Summary: VFS Classloader has potential to collide localized
resources
Key: ACCUMULO-2174
URL: https://issues.apache.org/jira/browse/ACCUMULO-2174
Project: Accumulo
Issue Type: Bug
Components: start
Affects Versions: 1.5.0
Reporter: Josh Elser
Assignee: Josh Elser
Fix For: 1.5.1, 1.6.0
Looking through the VFS implementation, a single directory is used for *all*
Accumulo processes on a single host for a given user.
Commons-vfs makes some attempt (adds a number to the localized resource,
created from a random number between 0 and 2**16, and incremented for each
updated resource) to give a "unique" resource. Rather than let this bite us
later on, it's rather simple for us to just query the runtime and get the pid
of the process to add into the temp directory that a process uses.
This could increase the copies of resources per host (by the number of
processes), but I think the performance penalty is much better than suddenly
getting someone else's jars in the middle of my process execution.
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