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Posted to dev@activemq.apache.org by "Timothy Bish (JIRA)" <ji...@apache.org> on 2011/07/07 00:49:16 UTC
[jira] [Commented] (AMQ-3034) Consumers hang when flow control is
enabled - unable to proceed?
[ https://issues.apache.org/jira/browse/AMQ-3034?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13060894#comment-13060894 ]
Timothy Bish commented on AMQ-3034:
-----------------------------------
Would be great if you could turn this into a JUnit test case to allow easy reproduction of the issue.
> Consumers hang when flow control is enabled - unable to proceed?
> ----------------------------------------------------------------
>
> Key: AMQ-3034
> URL: https://issues.apache.org/jira/browse/AMQ-3034
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Affects Versions: 5.4.2
> Environment: ubuntu linux 9.10
> Reporter: Jim Plush
> Priority: Critical
>
> I was seeing odd behavior in production and created a test case around the follow issue....
> I have a producer that will attempt to enqueue 1 million messages in a while loop. I set the activemq.xml systemUsage settings to the following http://pastebin.com/hJXnPHKK very low to reproduce the problem.
> about 1700 messages in I hit the memory and tempUsage limits for NON_PERSISTENT messages. My activemq log file now says:
> 2010-11-12 15:25:28,777 | INFO | Usage Manager Temp Store is Full (99% of 104857600). Stopping producer (ID:grv-crawl04-35650-1289603606125-0:0:1:1) to prevent flooding queue://benchmarks2. See http://activemq.apache.org/producer-flow-control.html for more info (blocking for: 722s) | org.apache.activemq.broker.region.Queue | ActiveMQ Transport: tcp:///10.128.129.20:38430
> which is expected as I just hit flow control. On another machine I fire up a consumer to try and dequeue messages while the producer is blocking. It's now in a state where I can't enqueue OR dequeue as the consumer times out on the .receive(10000) command. The only thing I can do at this point is restart the server which loses all the NON_PERSISTENT messages.
> Expected Result:
> Producer would hang when resources are maxed out, fire up a Consumer on another machine and it starts to dequeue and free up space, the producer slowly starts to enqueue messages again.
> Producer Code: http://pastebin.com/stAN5UJv
> Consumer Code: http://pastebin.com/dWuWWATr
> Version: apache-activemq-5.5-SNAPSHOT
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