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| Re: BIRT usage of Web Services [message #904614 is a reply to message #904313] |
Tue, 28 August 2012 20:27   |
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Anthony
I believe it would be a good idea to open a bugzilla request to help
determine why web service calls were causing threads to hang. BIRT uses
AJAX inside the viewer to call web services on the viewer to run a
report or retrieve a new page when you use page controls etc. If you
are only using charting from the viewer, you could try using the
/preview URL instead of the /run or frameset URL
Jason
On 8/28/2012 4:16 AM, Anthony Farrell wrote:
> Many thanks for any information you can provide Jason Weathersby.
>
> I have a couple of questions with regards to the run time architecture
> of BIRT, specifically with regards to what calls are made when BIRT
> reports are run asynchronously via AJAX calls.
>
>
> The background is that a production system was running slowly, it was
> found that some Web Service calls were causing threads to hang or to
> return very slowly (4 hours) to the WebSphere thread pool. The BIRT
> Viewer is deployed as a separate Web Application on WebSphere, with BIRT
> reports being integrated into the Main Application via client side
> aggregation, i.e. the main application embeds BIRT charts via embedded
> URL calls to the BIRT Viewer application..
>
>
> For the threads that were running very slowly, the Wepshere log files
> contain stack traces from BIRT where the "axis" package names appeared
> with the BIRT stack trace. My assumption was that BIRT uses some axis
> API's internally to support AJAX or some other purposes, can you confirm
> that no web service calls are made as part of the run time invocation of
> a BIRT report.
>
>
>
>
> Have you seen any other production system issues similar to the one we
> are seeing?
> We are also reviewing to see if we can allocate a seperate thread pool
> to the BIRT viewer appliction on Webpshere, the idea is to seperate any
> BIRT long running processso that they do not impact the main applicaion
> (which has strict performance requirements).
> Do you know if it is possible to allocate a thread pool to the BIRT
> Viewer web app (even if it uses web services? or does a web services
> call complicate he deployment configuration. Apologies for the array of
> questions.
>
> We have verified that there are no BIRT reports that consume or
> reference Web Services, we are currently getting a list of the SQL
> statements that were running on the database at the time to verify that
> there were/are NO very inefficient blocks of SQL with any BIRT reports.
>
>
>
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| Re: BIRT usage of Web Services [message #905047 is a reply to message #904880] |
Wed, 29 August 2012 15:31 |
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Thanks, btw run mapping uses very little in the way of the AJAX
framework, but I would try the preview mapping. Have you tried the BIRT
tag libraries as well?
Jason
On 8/29/2012 6:08 AM, Anthony Farrell wrote:
> Jason, thanks for the information provided so far, I will get the
> resources on site to raise a bug for investigation with regards to the
> web services causing threads to hang.
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| Re: BIRT usage of Web Services [message #908034 is a reply to message #907593] |
Tue, 04 September 2012 15:11 |
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Anthony
Look at this link:
http://www.eclipse.org/birt/phoenix/deploy/viewerUsageMain.php
Specifically look at the servlet mappings image. Run uses AJAX to allow
a user to cancel the report. Did you try the preview mapping?
Jason
On 9/4/2012 3:45 AM, Anthony Farrell wrote:
> Just for our background information.
>
> Is there any document or picutre that shows the runtime calls with AJAX
> when using "run" is used (when none of the controls in the viewer are
> used, no print etc), just build the chart and embed it. I know from
> looking at this that two calls are made to the viewer a "HTTP get" and a
> "HTTP put".
>
> thanks.
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