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From "Simone Tripodi (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DIGESTER-163) ConcurrentModificationException creating a new Digester via loaderInstance.newDigester()
Date Thu, 15 Mar 2012 14:33:39 GMT

    [ https://issues.apache.org/jira/browse/DIGESTER-163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13230197#comment-13230197
] 

Simone Tripodi commented on DIGESTER-163:
-----------------------------------------

Just to keep you updated my tests: I am getting {{NPE}}s because {{test.xml}} looks like

{code}
<root>
  <container>
    <header>
      <authors>
        <author>Author 1</author>
      </authors>
    </header>
  </container>
</root>
{code}

while rules are configured like (despite the class renaming)

{code}
<digester-rules>
  <object-create-rule classname="org.apache.commons.digester3.binder.Entity" pattern="container"/>
  <!-- author -->
  <call-method-rule methodname="setAuthor" paramcount="1" pattern="container/header/authors/author"/>
</digester-rules>
{code}

so we have two options:

 * rules pattern are wrong;

 * sample is wrong.

I am removing the {{<root>}} element and see what happens. let you know soon!
                
> ConcurrentModificationException creating a new Digester via loaderInstance.newDigester()
> ----------------------------------------------------------------------------------------
>
>                 Key: DIGESTER-163
>                 URL: https://issues.apache.org/jira/browse/DIGESTER-163
>             Project: Commons Digester
>          Issue Type: Bug
>    Affects Versions: 3.2
>         Environment: Linux, JDK 6
>            Reporter: Torsten Krah
>         Attachments: Digester163TestCase.java
>
>
> I am gettig a ConcurrentModificationException when trying to create new Digester instance
from a configured loader:
> Trace is:
> {code}
> java.util.ConcurrentModificationException: null
> 	at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:761) ~[na:1.6.0_27]
> 	at java.util.LinkedList$ListItr.next(LinkedList.java:696) ~[na:1.6.0_27]
> 	at org.apache.commons.digester3.binder.FromBinderRuleSet.addRuleInstances(FromBinderRuleSet.java:130)
~[commons-digester3-3.2.jar:3.2]
> 	at org.apache.commons.digester3.binder.DigesterLoader.addRules(DigesterLoader.java:581)
~[commons-digester3-3.2.jar:3.2]
> 	at org.apache.commons.digester3.binder.DigesterLoader.newDigester(DigesterLoader.java:568)
~[commons-digester3-3.2.jar:3.2]
> 	at org.apache.commons.digester3.binder.DigesterLoader.newDigester(DigesterLoader.java:516)
~[commons-digester3-3.2.jar:3.2]
> 	at org.apache.commons.digester3.binder.DigesterLoader.newDigester(DigesterLoader.java:475)
~[commons-digester3-3.2.jar:3.2]
> 	at org.apache.commons.digester3.binder.DigesterLoader.newDigester(DigesterLoader.java:462)
~[commons-digester3-3.2.jar:3.2]
> {code}
> The binder documentation (employee servlet) and the mailing list did confirm to me, that
the loader should be safe to be shared, so this should not happen.

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