When testing our Wicket application (Wicket 7.2.0 on WAS 8.5, Linux) we do experience occasional ComponentNotFoundExceptions under test load. This Exception does not occur under normal user load. Has anyone experienced this kind of error yet?
The exception says that the user (browser, load testing tool) makes a request to some component or behavior added to a component but this component is not in the page hierarchy.
Apparently the problem happens only when the application is used by many users (load test) and there is a bug in the application.
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I have made a Wai web application and it is being run using Warp. However I have one AJAX request that takes quite some time to finish, while that request is pending, no other requests will be accepted by the server. I thought Warp was capable of handling concurrent requests. Am I missing something? The way I run Warp is just by calling run port app where run is imported via import Network.Wai.Handler.Warp (run) and app is my Wai application.
I was trying Happstack Lite to see whether it would solve my problem, and there the -threaded flag was used when compiling the web application, which also solved my concurrent requests problem in the Warp application. I was under the assumption that GHC would have threading support by default, but apparently this have to be specified explicitly during compilation.
I am using GWT 2.5.0 and in my server side code there are several datasources so i am not able to run embedded jetty server.
So, I am resolved to use gwt debugger with -noserver option. Now i am able to debug my application but every time i refresh my browser, it takes hell lot of time to load application on browser and also it is very resource consuming.
On my eclipse, i can see through log message on console that every time i refresh, it recompiles all the RPC classes and verify.This process takes a lot of time.
My question is that it should happen only for the first time app gets loaded on browser not on every refresh. Is there any way, to get rid of this. It really takes lot of my time.
Looking forward for the help,
regards,
pankaj
We use JRebel. It spared us months of redeployment efforts. I consider it much better than GWT super dev mode.
I'm doing some stuff using GWT with rpc calls in order to get MySQL queries. These queries can be big (up to 500 entries). When I do the RPC call, the browser freeze ( for example, my loading .gif image is frozen ). I thought using RPC call with asyncallback would avoid this problem but obviously It doesn't.
My tests are made on Eclipse (GWT dev plug in) in development mode so I was also wondering if the problem does not come from the server provided by Google. Moreover, I would like to know if this problem will stay when I will deploy the application to an other server. If no, could give me some advices to avoid this type of problems.
First of all, are you running this query on the load of the application? If it is the case, then it is normal.
From my experience with gwt, elcipse and Tomcat, the freeze only happen in Eclipse. When you deploy your application on a server such as Tomcat, this problem will disappear even if the RPC call is on the load of the application.
I'm having trouble with Web Start.
There is no problem if I start the application from IntelliJ.
With Web Start it's working ok most of the time but at a point I'm loading 10000 records from database and there it's getting very slow.
What can I do?
Thanks,
It is possible that running as a WebStart application, your application has diferent memory settings. You should attempt to tweak those (as described here) and see if that makes a difference with application performance.
Other than that, you should profile your application to see where the delays occur (which parts of the application, what kind of operations, constantly or intermittently etc.)
After I close my application fbclient.dll remains in memory for about 3 seconds. So it locks the database file and prevents my application from unloading. I'm using Firebird embedded.
The problem is related to events. I signup to events using isc_que_events. If I don't signup to events dll unloads instantly.
I faced this problem in previous FB versions and now in 2.1.3 it's still the same.
The same issue is described here http://tracker.firebirdsql.org/browse/CORE-15, but it's resolved as "Cannot Reproduce".
Is anybody facing this problem or there's something wrong with my code?
Are you using the .NET Provider? This one keeps connections open in a pool, maybe this is the problem. Try clearing the connection pool before exiting your application:
FbConnection.ClearAllPools();
I've rewritten my logic and now I don't need to subscribe to local events. So it's not a problem for me anymore. But the issue still remains.