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Posted to dev@cocoon.apache.org by "Alfred Nathaniel (JIRA)" <ji...@apache.org> on 2019/02/21 14:36:00 UTC

[jira] [Created] (COCOON-2362) Unsynchronized HashMap.put leads to infinite loop

Alfred Nathaniel created COCOON-2362:
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             Summary: Unsynchronized HashMap.put leads to infinite loop
                 Key: COCOON-2362
                 URL: https://issues.apache.org/jira/browse/COCOON-2362
             Project: Cocoon
          Issue Type: Bug
          Components: * Cocoon Core
    Affects Versions: 2.1.12
            Reporter: Alfred Nathaniel
             Fix For: 2.1.13


Under load a Cocoon thread occasionally starts spinning at 100% in an infinite loop.  The reason is concurrent writing to a HashMap without proper synchronization.  The two stack traces are:

{noformat}
java.util.HashMap.put (HashMap.java:420)
org.apache.cocoon.components.language.generator.GeneratorSelector.select (GeneratorSelector.java:125)
{noformat}

{noformat}
java.util.HashMap.getEntry(HashMap.java:465)
java.util.HashMap.get(HashMap.java:417)
org.apache.cocoon.reading.ResourceReader.getLastModified(ResourceReader.java:242)
{noformat}




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