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List:       tapestry-dev
Subject:    [jira] [Created] (TAP5-2595) CME in MutableComponentModelImpl.metaData
From:       "Michael Mikhulya (JIRA)" <jira () apache ! org>
Date:       2018-01-10 14:28:02
Message-ID: JIRA.13129862.1515594450000.617804.1515594482448 () Atlassian ! JIRA
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Michael Mikhulya created TAP5-2595:
--------------------------------------

             Summary: CME in MutableComponentModelImpl.metaData
                 Key: TAP5-2595
                 URL: https://issues.apache.org/jira/browse/TAP5-2595
             Project: Tapestry 5
          Issue Type: Bug
          Components: tapestry-core
    Affects Versions: 5.4.1
            Reporter: Michael Mikhulya


Sometimes app fails to normally start. There are stack traces from production \
environment:

{noformat}
Caused by: java.util.ConcurrentModificationException: null
        at org.apache.tapestry5.ioc.util.CaseInsensitiveMap.select(CaseInsensitiveMap.java:487)
                
        at org.apache.tapestry5.ioc.util.CaseInsensitiveMap.select(CaseInsensitiveMap.java:457)
                
        at org.apache.tapestry5.ioc.util.CaseInsensitiveMap.get(CaseInsensitiveMap.java:393)
                
        at org.apache.tapestry5.ioc.internal.util.InternalUtils.get(InternalUtils.java:493)
                
        at org.apache.tapestry5.internal.model.MutableComponentModelImpl.getMeta(MutableComponentModelImpl.java:359)
                
        at ru.aktivo.services.SecurityChecker.activatePage(SecurityChecker.java:62)
        at $PageActivator_9e307e7399594.activatePage(Unknown Source)
        at org.apache.tapestry5.internal.services.AjaxComponentEventRequestHandler.handle(AjaxComponentEventRequestHandler.java:92)



Caused by: java.util.ConcurrentModificationException: null
        at org.apache.tapestry5.ioc.util.CaseInsensitiveMap.select(CaseInsensitiveMap.java:487)
                
        at org.apache.tapestry5.ioc.util.CaseInsensitiveMap.select(CaseInsensitiveMap.java:457)
                
        at org.apache.tapestry5.ioc.util.CaseInsensitiveMap.get(CaseInsensitiveMap.java:393)
                
        at org.apache.tapestry5.ioc.internal.util.InternalUtils.get(InternalUtils.java:493)
                
        at org.apache.tapestry5.internal.model.MutableComponentModelImpl.getMeta(MutableComponentModelImpl.java:359)
                
        at org.apache.tapestry5.internal.services.MetaDataLocatorImpl.locate(MetaDataLocatorImpl.java:145)
                
        at org.apache.tapestry5.internal.services.MetaDataLocatorImpl.access$000(MetaDataLocatorImpl.java:28)
                
        at org.apache.tapestry5.internal.services.MetaDataLocatorImpl$1.valueForKey(MetaDataLocatorImpl.java:95)
                
        at org.apache.tapestry5.internal.services.MetaDataLocatorImpl.getSymbolExpandedValueFromCache(MetaDataLocatorImpl.java:124)
                
        at org.apache.tapestry5.internal.services.MetaDataLocatorImpl.findMeta(MetaDataLocatorImpl.java:90)
  at $MetaDataLocator_9e307e73993e5.findMeta(Unknown Source)
        at org.apache.tapestry5.internal.services.PersistentFieldManagerImpl.findStrategy(PersistentFieldManagerImpl.java:99)
                
        at org.apache.tapestry5.internal.services.PersistentFieldManagerImpl.postChange(PersistentFieldManagerImpl.java:84)
                
        at $PersistentFieldManager_9e307e739942c.postChange(Unknown Source)
        at org.apache.tapestry5.internal.structure.PageImpl.persistFieldChange(PageImpl.java:266)
 {noformat}

These exceptions appears when app is started under load (small load, no benchmarks or \
whatever else).

If problem arise then app can't be normally started. Exception is thrown each time. \
Seems like the internal state of CaseInsensitiveMap become broken.

I will attach a patch for issue in several minutes.



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