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https://issues.apache.org/activemq/browse/SM-1061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_40164
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Jeff Peterson commented on SM-1061:
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Please include in 3.1.2 release
> Race condition in RSS feed-writer component
> -------------------------------------------
>
> Key: SM-1061
> URL: https://issues.apache.org/activemq/browse/SM-1061
> Project: ServiceMix
> Issue Type: Bug
> Components: servicemix-components
> Affects Versions: 3.1, 3.1.1
> Environment: ServiceMix 3.1.1, Java 1.5.0_6
> Reporter: Jeff Peterson
> Priority: Critical
> Attachments: feedwriter.patch
>
>
> We are using ServiceMix to create a RSS feed from XML documents flowing
> across the bus and have run across a synchronization problem with the
> FeedWriter.java class. We are using the eip:xpath-splitter component to feed
> the FeedWriter.java RSS component are a seeing messages either dropped and/or
> the feed file getting corrupted with invalid documents. From the ServiceMix
> log we see individual threads processing each FeedWriter input message and
> have placed "synchronization" inside the FeedWriter.java process( ) method
> and getCachedFeed( ) method to correct this problem.
> Log snippet:
> 15:03:58,197 | DEBUG | pool-flow.seda.feedWriter-thread-2 | FeedWriter
> | emix.components.rss.FeedWriter 198 | Enter process() MESSAGE
> 15:03:58,478 | DEBUG | pool-flow.seda.feedWriter-thread-1 |
> DeliveryChannelImpl | .messaging.DeliveryChannelImpl 413 | Send
> ID:134.120.209.157-1151f534169-4:3 in DeliveryChannel{feedWriter}
> 15:03:58,478 | DEBUG | pool-flow.seda.feedWriter-thread-1 | SedaFlow
> | emix.jbi.nmr.flow.AbstractFlow 121 | Called Flow send
> 15:03:58,478 | DEBUG | pool-flow.seda.feedWriter-thread-1 | FeedWriter
> | emix.components.rss.FeedWriter 206 | Exit process() MESSAGE
> 15:03:58,478 | DEBUG | pool-flow.seda.feedWriter-thread-2 |
> DeliveryChannelImpl | .messaging.DeliveryChannelImpl 413 | Send
> ID:134.120.209.157-1151f534169-4:4 in DeliveryChannel{feedWriter}
> 15:03:58,478 | DEBUG | pool-flow.seda.feedWriter-thread-2 | SedaFlow
> | emix.jbi.nmr.flow.AbstractFlow 121 | Called Flow send
> 15:03:58,478 | DEBUG | pool-flow.seda.feedWriter-thread-2 | FeedWriter
> | emix.components.rss.FeedWriter 206 | Exit process() MESSAGE
> 15:03:58,478 | DEBUG | pool-flow.seda.feedWriter-thread-3 | SedaQueue
> | .jbi.nmr.flow.seda.SedaQueue$1 132 | [EMAIL PROTECTED] dequeued
> exchange: InOnly[
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