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https://issues.apache.org/jira/browse/AMQ-4971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13873301#comment-13873301
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Gary Tully commented on AMQ-4971:
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the prefetch should limit the number of messages pending an ack at one time.
try{code}<networkConnector .... prefetchSize="1" .../>{code}
> OOM in DemandForwardingBridge
> -----------------------------
>
> Key: AMQ-4971
> URL: https://issues.apache.org/jira/browse/AMQ-4971
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Affects Versions: 5.9.0
> Reporter: Yuriy Sidelnikov
> Labels: features
> Attachments: AMQ-4971.patch
>
>
> DemandForwardingBridge sends messages to the other broker and asynchronously
> waits for ACKs keeping message bodies in heap. Amount of un-ACK-ed messages
> kept in heap is not limited. If local producer is fast then whole heap will
> be consumed by messages waiting to be ACK-ed by other broker.
> Possible option to fix the issue:
> Don't wait for ACK from other broker when forwarding the message if some
> threshold of un-ACK-ed messages is reached.
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