[ 
https://issues.apache.org/jira/browse/JOSHUA-252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15303106#comment-15303106
 ] 

ASF GitHub Bot commented on JOSHUA-252:
---------------------------------------

Github user mjpost commented on the pull request:

    https://github.com/apache/incubator-joshua/pull/12#issuecomment-222016587
  
    Also, multithreading is broken. I randomly (not always) get the following 
error when decoding with more than 1 thread:
    
    ```
    Exception in thread "Thread-4" java.lang.RuntimeException: Input 1: FATAL 
UNCAUGHT EXCEPTION: null
        at 
org.apache.joshua.decoder.Decoder$DecoderThreadRunner.run(Decoder.java:433)
    Caused by: java.util.ConcurrentModificationException
        at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
        at java.util.ArrayList$Itr.next(ArrayList.java:851)
        at 
org.apache.joshua.decoder.chart_parser.DotChart.addDotItem(DotChart.java:362)
        at 
org.apache.joshua.decoder.chart_parser.DotChart.expandDotCell(DotChart.java:223)
        at org.apache.joshua.decoder.chart_parser.Chart.expand(Chart.java:585)
        at 
org.apache.joshua.decoder.DecoderThread.translate(DecoderThread.java:141)
        at 
org.apache.joshua.decoder.Decoder$DecoderThreadRunner.run(Decoder.java:424)
    ```



> Make it possible to use Maven to build Joshua
> ---------------------------------------------
>
>                 Key: JOSHUA-252
>                 URL: https://issues.apache.org/jira/browse/JOSHUA-252
>             Project: Joshua
>          Issue Type: Improvement
>          Components: build
>            Reporter: Tommaso Teofili
>            Assignee: Tommaso Teofili
>             Fix For: 6.1
>
>
> As per discussion on the dev@ list for now Ant is the official build tool for 
> Joshua however we would like to possibly switch to Maven if / when someone is 
> able to do so.
> Assigning to me for now as I could be able to look into this.



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