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Posted to dev@activemq.apache.org by "Allan Schrum (JIRA)" <ji...@apache.org> on 2008/11/07 18:28:05 UTC
[jira] Created: (AMQNET-122) Recent OpenWireFormat changes cause
initial startup delays
Recent OpenWireFormat changes cause initial startup delays
----------------------------------------------------------
Key: AMQNET-122
URL: https://issues.apache.org/activemq/browse/AMQNET-122
Project: ActiveMQ .Net
Issue Type: Bug
Components: ActiveMQ Client
Environment: Windows XP, ActiveMQ 5.2.0 RC2+, latest Apache.NMS and Apache.NMS.ActiveMQ
Reporter: Allan Schrum
Assignee: Jim Gomes
The recent changes to Apache.NMS.ActiveMQ's file OpenWire/OpenWireFormat.cs create massive delays on my system. If I revert that file back to the version 693666 (09-Sep-2008) then all my code starts working without delays. It seems that the action of writing to the bus (using Topics in my case) is delayed 120 seconds or so. Each write seems to be delayed 15 seconds. Since startup involves several writes the initialize the wire format, I suspect that a timeout variable is set to 0 (zero) which does not allow a thread-swap to take place. I suspect that the timeout should be set to 1 ms so that a context switch will take place.
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[jira] Updated: (AMQNET-122) Recent OpenWireFormat changes cause
initial startup delays
Posted by "Jim Gomes (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/activemq/browse/AMQNET-122?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jim Gomes updated AMQNET-122:
-----------------------------
Regression: [Regression]
Fix Version/s: 1.1
Affects Version/s: 1.1
> Recent OpenWireFormat changes cause initial startup delays
> ----------------------------------------------------------
>
> Key: AMQNET-122
> URL: https://issues.apache.org/activemq/browse/AMQNET-122
> Project: ActiveMQ .Net
> Issue Type: Bug
> Components: ActiveMQ Client
> Affects Versions: 1.1
> Environment: Windows XP, ActiveMQ 5.2.0 RC2+, latest Apache.NMS and Apache.NMS.ActiveMQ
> Reporter: Allan Schrum
> Assignee: Jim Gomes
> Fix For: 1.1
>
>
> The recent changes to Apache.NMS.ActiveMQ's file OpenWire/OpenWireFormat.cs create massive delays on my system. If I revert that file back to the version 693666 (09-Sep-2008) then all my code starts working without delays. It seems that the action of writing to the bus (using Topics in my case) is delayed 120 seconds or so. Each write seems to be delayed 15 seconds. Since startup involves several writes the initialize the wire format, I suspect that a timeout variable is set to 0 (zero) which does not allow a thread-swap to take place. I suspect that the timeout should be set to 1 ms so that a context switch will take place.
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[jira] Resolved: (AMQNET-122) Recent OpenWireFormat changes cause
initial startup delays
Posted by "Jim Gomes (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/activemq/browse/AMQNET-122?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jim Gomes resolved AMQNET-122.
------------------------------
Resolution: Fixed
Recent changes introduced a deadlock when creating a Session.
> Recent OpenWireFormat changes cause initial startup delays
> ----------------------------------------------------------
>
> Key: AMQNET-122
> URL: https://issues.apache.org/activemq/browse/AMQNET-122
> Project: ActiveMQ .Net
> Issue Type: Bug
> Components: ActiveMQ Client
> Affects Versions: 1.1
> Environment: Windows XP, ActiveMQ 5.2.0 RC2+, latest Apache.NMS and Apache.NMS.ActiveMQ
> Reporter: Allan Schrum
> Assignee: Jim Gomes
> Fix For: 1.1
>
>
> The recent changes to Apache.NMS.ActiveMQ's file OpenWire/OpenWireFormat.cs create massive delays on my system. If I revert that file back to the version 693666 (09-Sep-2008) then all my code starts working without delays. It seems that the action of writing to the bus (using Topics in my case) is delayed 120 seconds or so. Each write seems to be delayed 15 seconds. Since startup involves several writes the initialize the wire format, I suspect that a timeout variable is set to 0 (zero) which does not allow a thread-swap to take place. I suspect that the timeout should be set to 1 ms so that a context switch will take place.
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[jira] Commented: (AMQNET-122) Recent OpenWireFormat changes cause
initial startup delays
Posted by "Allan Schrum (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/activemq/browse/AMQNET-122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=47186#action_47186 ]
Allan Schrum commented on AMQNET-122:
-------------------------------------
In Apache.NMS the file NMSConstants.cs has a new variable called defaultRequestTimeout = TimeSpan.FromMilliseconds(Timeout.Infinite). This is used in conjunction with another thread to handle timeout. It is thought that the above value would cause one thread to block forever (until the blocking signal occurs). When working on failover addition to Apache.NMS.ActiveMQ it was noticed that when Timeout.Infinite was used it didn't block. Rather it returned immediately and continued on. Using the "traditional" default timeout of 1 ms caused the threads to context switch which allowed the mutex to properly fire and all was well.
I do not know if this is the cause of the problem, but it is focused on the use of RequestTimeout of TcpTransport.cs which is initialized to this constant.
> Recent OpenWireFormat changes cause initial startup delays
> ----------------------------------------------------------
>
> Key: AMQNET-122
> URL: https://issues.apache.org/activemq/browse/AMQNET-122
> Project: ActiveMQ .Net
> Issue Type: Bug
> Components: ActiveMQ Client
> Environment: Windows XP, ActiveMQ 5.2.0 RC2+, latest Apache.NMS and Apache.NMS.ActiveMQ
> Reporter: Allan Schrum
> Assignee: Jim Gomes
>
> The recent changes to Apache.NMS.ActiveMQ's file OpenWire/OpenWireFormat.cs create massive delays on my system. If I revert that file back to the version 693666 (09-Sep-2008) then all my code starts working without delays. It seems that the action of writing to the bus (using Topics in my case) is delayed 120 seconds or so. Each write seems to be delayed 15 seconds. Since startup involves several writes the initialize the wire format, I suspect that a timeout variable is set to 0 (zero) which does not allow a thread-swap to take place. I suspect that the timeout should be set to 1 ms so that a context switch will take place.
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