Github user thammegowda commented on the pull request:
https://github.com/apache/incubator-joshua/pull/12#issuecomment-222027825
My guess is that `ConcurrentModificationException` occurs when we try to
loop (eg: for) on a collection and inside the loop the collection is being
updated (by adding or removing items).
However, based on the exception, I checked
https://github.com/apache/incubator-joshua/blob/JOSHUA-252/src/main/java/org/apache/joshua/decoder/chart_parser/DotChart.java#L362
there isnt any such code. I suspect Rule.toString().
That line executes only if DEBUG level is enabled! try disabling DEBUG (by
setting Log4j level to INFO or higher until we find a fix
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
