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https://issues.apache.org/activemq/browse/CAMEL-3189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=62277#action_62277
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Claus Ibsen commented on CAMEL-3189:
------------------------------------
You could paste details about the route you use as well?
> Completed aggregated exchanges are never confirmed in the
> AggregationRepository
> -------------------------------------------------------------------------------
>
> Key: CAMEL-3189
> URL: https://issues.apache.org/activemq/browse/CAMEL-3189
> Project: Apache Camel
> Issue Type: Bug
> Affects Versions: 2.3.0
> Reporter: Glenn Moss
>
> Under certain circumstances, the completed exchanges from an aggregator would
> remain in the AggregationRepository and redeliver after a restart of Camel.
> These exchanges had already successfully completed their route, so this
> redelivery is in error.
> My guess is that in the AggregationProcessor on line 374, the
> AggregateOnCompletion gets added to a UnitOfWork that doesn't ever get done()
> called on it... or something.
> I seemed to be able to prevent the problem by changing my
> AggregationStrategy. The old version looked like this:
> {code}
> public Exchange aggregate (Exchange oldExchange, Exchange newExchange) {
> String body = "";
> if (oldExchange != null) {
> body = oldExchange.getIn().getBody(String.class);
> }
> body += newExchange.getIn().getBody(String.class);
> newExchange.getIn().setBody(body);
> return newExchange;
> }
> {code}
> You can see that the exchanges are aggregated into the newExchange. I changed
> it to aggregate into the oldExchange:
> {code}
> public Exchange aggregate (Exchange oldExchange, Exchange newExchange) {
> String body = "";
> if (oldExchange != null) {
> body = oldExchange.getIn().getBody(String.class);
> } else {
> oldExchange = newExchange;
> }
> body += newExchange.getIn().getBody(String.class);
> oldExchange.getIn().setBody(body);
> return oldExchange;
> }
> {code}
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