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From "Allan Schrum (JIRA)" <>
Subject [jira] Updated: (AMQNET-26) Add failover:// to NMS client
Date Fri, 07 Nov 2008 17:20:52 GMT


Allan Schrum updated AMQNET-26:

    Attachment: Apache.NMS.709310.diff

The attached file should address the URISupport.cs problem identified by Christian. The parseComposite()
routine now correctly parses singleton URI into a composite structure so that the connection
can be completed. Support for failover is still maintained.

I have discovered two additional issues that need to be addressed. The first is Microsoft's
Uri class will not accept a failover URL of the form:


because the implied host (that which is in the parenthesis) is not a valid hostname (I guess).
While the scheme is not a publicly recognized scheme I would think Microsoft would defer interpretation
at that level, or provide a way to supply a private scheme parser. I couldn't find one. Thus
the above syntax fails. Funny thing is, the following works:


though it is not a legal format either (missing forward slashes). With some investigation,
the following does work and is a valid URL from the Uri class's point of view:


The explicit host and path (trailing slash) provide sufficient context for Uri to accept it.
Even though we ignore the failover host (the first localhost) for failover processing, this
will probably need to be the way a correct URL is provided for failover operation.

Second, 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.
So it hangs. I will make this comment on [AMQNET-121]. (See
as well.

Please test and give feedback. If it is positive, then Jim can commit the change to the repository.


> Add failover:// to NMS client
> -----------------------------
>                 Key: AMQNET-26
>                 URL:
>             Project: ActiveMQ .Net
>          Issue Type: New Feature
>          Components: ActiveMQ Client
>            Reporter: Denis Abramov
>            Assignee: Jim Gomes
>            Priority: Critical
>             Fix For: 1.1
>         Attachments: Apache.NMS.707373.diff, Apache.NMS.707373a.diff, Apache.NMS.709310.diff,
Apache.NMS.ActiveMQ.707373.diff, Apache.NMS.ActiveMQ.707373a.diff
> Please add failover:// to C# NMS Client. I would add it but I don't know how to resume
a stream once it is broken.

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