Konstantin Pokrovsky created MCHECKSTYLE-244:
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Summary: LicenseResourceManager component is not thread safe and
causes parallel build failures
Key: MCHECKSTYLE-244
URL: https://jira.codehaus.org/browse/MCHECKSTYLE-244
Project: Maven Checkstyle Plugin
Issue Type: Bug
Affects Versions: 2.12.1, 2.12
Reporter: Konstantin Pokrovsky
*LicenseResouceManager* component does not specify instantiation strategy. By
default plexus uses singleton strategey which leads to
*ConcurrentModificationException* in parallel maven builds. Example: when two
*DefaultCheckstyleExecutors* try to use one licence manager: one calls
*addSearchPath* on *FileResourceLoader* while the other one iterating over
paths in *getResource* on the same *FileResourceLoader* .
[MCHECKSTYLE-238|https://jira.codehaus.org/browse/MCHECKSTYLE-238] and
[MCHECKSTYLE-230|https://jira.codehaus.org/browse/MCHECKSTYLE-230] are exactly
about this situation. Right now the plugin for some reason is marked as thread
safe although it produces exceptions in paralled multimodule builds.
*DefaultCheckstyleRssGenerator* also is a point of attention becaue it is also
singleton instantiated.
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