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https://issues.apache.org/jira/browse/CAMEL-10084?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen resolved CAMEL-10084.
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Resolution: Won't Fix
I have amended the javadoc to indicate to favor returning old exchange
> AggregateProcessor/JdbcAggregationRepository : table COMPLETED not cleaned
> when AggregationStrategy.aggregate does not return oldExchange
> ------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: CAMEL-10084
> URL: https://issues.apache.org/jira/browse/CAMEL-10084
> Project: Camel
> Issue Type: Bug
> Components: camel-core, camel-sql
> Affects Versions: 2.16.2
> Reporter: Richard Vigniel
> Assignee: Claus Ibsen
> Fix For: 2.19.0
>
> Attachments: CAMEL-10084.patch
>
>
> Hi,
> in AggregateProcessor + JdbcAggregationRepository :
> the table _AGG_COMPLETED is not cleaned when AggregationStrategy.aggregate()
> does returns newExchange .
> it is ok when aggregate() returns oldExchange,
> looking at the code at these places:
> https://github.com/apache/camel/blob/master/camel-core/src/main/java/org/apache/camel/processor/aggregate/AggregateProcessor.java#L662
> https://github.com/apache/camel/blob/master/components/camel-sql/src/main/java/org/apache/camel/processor/aggregate/jdbc/JdbcAggregationRepository.java#L317
> https://github.com/apache/camel/blob/master/camel-core/src/main/java/org/apache/camel/processor/aggregate/AggregateProcessor.java#L694
> it works as follow:
> 1. AggregateProcessor asks to remove oldExchange from _AGG. it gives
> correlationKey and oldExcange as parameter
> 2. JdbcAggregationRepository deletes exchange from _AGG with correlationKey
> and insert given exchange (oldExchange) in _AGG_COMPLETED
> 3. AggregateProcessor confirms exchange is complete, and ask
> JdbcAggregationRepository to delete aggregated exchange from _AGG_COMPLETED
> *if aggregated exchange does not have the same id as oldExchange, point 3
> does nothing and oldExchange stays in _AGG_COMPLETED*
> the problem seems to be in point 2, the aggregatedExchange should be given
> instead of oldExchange.
> the aggregation works fine, but the _AGG_COMPLETED fills up and recovery will
> definitely not work in this scenario.
> workaround: always return oldExchange in AggregationStrategy.aggregate()
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