[jira] Updated: (SM-1061) Race condition in RSS feed-writer component

["Guillaume Nodet (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/activemq/browse/SM-1061?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Guillaume Nodet updated SM-1061:
--------------------------------

    Fix Version/s: 3.2
                   3.1.3

Sorry we missed your patch :-(

> 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
>             Fix For: 3.1.3, 3.2
>
>         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 | org.apache.servicemix.jbi.nmr.flow.seda.SedaQueue$1@1a72981 dequeued exchange: InOnly[

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