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From "Lionel Cons (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMQ-3318) "Detected store dropped message" errors when broker is run against the stomp-benchmark
Date Fri, 13 May 2011 07:20:47 GMT

    [ https://issues.apache.org/jira/browse/AMQ-3318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13032855#comment-13032855
] 

Lionel Cons commented on AMQ-3318:
----------------------------------

Since it occurred only once during ten consecutive runs, it's likely a hard to reproduce race
condition...

My machine has 8 cores and 16 GB of RAM. I started Apollo with
{code}
JVM_FLAGS="-server -Xmx8192m -Xms4096m"
{code}

Here is what stomp-benchmark recorded:
{code}
  "benchmark_settings": {
    "broker_name": "run1",
    "host": "localhost",
    "port": 61613,
    "sample_count": 30,
    "sample_interval": 2000,
    "warm_up_count": 5,
    "scenario_connection_scale_rate": 50
  },
{code}


> "Detected store dropped message" errors when broker is run against the stomp-benchmark
> --------------------------------------------------------------------------------------
>
>                 Key: AMQ-3318
>                 URL: https://issues.apache.org/jira/browse/AMQ-3318
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Apollo, Broker
>            Reporter: Hiram Chirino
>            Assignee: Hiram Chirino
>
> Lionel Cons wrote:
> {quote}
>  ran stomp-benchmark several times in a row against Apollo
> 20110505.135118-111 and it worked fine with one exception.
> During less than one second, it logged several messages like this:
> 2011-05-11 05:54:09,661 | INFO  | Detected store dropped message at seq: 467787239 |
org.apache.activemq.apollo.broker.QueueEntry | bdb store io read
> 2011-05-11 05:54:09,661 | INFO  | Detected store dropped message at seq: 467787240 |
org.apache.activemq.apollo.broker.QueueEntry | bdb store io read
> 2011-05-11 05:54:09,662 | INFO  | Detected store dropped message at seq: 467787241 |
org.apache.activemq.apollo.broker.QueueEntry | bdb store io read
> [...]
> 2011-05-11 05:54:09,681 | INFO  | Detected store dropped message at seq: 467787325 |
org.apache.activemq.apollo.broker.QueueEntry | bdb store io read
> 2011-05-11 05:54:09,681 | INFO  | Detected store dropped message at seq: 467787326 |
org.apache.activemq.apollo.broker.QueueEntry | bdb store io read
> 2011-05-11 05:54:09,681 | INFO  | Detected store dropped message at seq: 467787327 |
org.apache.activemq.apollo.broker.QueueEntry | bdb store io read
> {quote}

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