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From "Konstantin Pokrovsky (JIRA)" <j...@codehaus.org>
Subject [jira] (MCHECKSTYLE-244) LicenseResourceManager component is not thread safe and causes parallel build failures
Date Thu, 31 Jul 2014 22:36:10 GMT
Konstantin Pokrovsky created MCHECKSTYLE-244:
------------------------------------------------

             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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