B4J Question Strange behavior Httputils and JobDone

Are you checking for download errors in JobDone?

Erel said:

Are you checking for download errors in JobDone?

Click to expand...

Hi Erel,

I.m not checking for download error in JobDone.
There no Errors in Jobdone just less Download Jobs.
Images are there so they are not missing.
I am using the imagedownloader.

So there are jobs that never complete?

Which server are you downloading the files from?

Erel said:

So there are jobs that never complete?

Which server are you downloading the files from?

Click to expand...

Hi Erel,
Yes some Jobs never complete.
The Application I'm busy with connect to a MySql Database on the Server. I test with more then one Server all the same problem.
I also have a server here at home in my local network for testing and there is the same problem. Even when I connect with my local IP.
In the Database Table there is the Links to the Image(Thumbnail) saved as URL. All the Images are there not one missing.
The information about the Image (ANPR Images) are nicely shown in the Table.
Testing the Application somewhere else there is the same problem. Missing Images.
If I download about 20 Images there is no Problem.

Is there a option to download a Images Directly without Jobdone so I can test this better?

Thanks Erel for helping.

You can test it with HttpUtils2 instead of ImageDownloader. You will still need to handle the JobDone event.

If your server is running a standard Windows OS (not Windows Server) then it might cause such issues. Microsoft deliberately limit the number of concurrent connections allowed.

Erel said:

You can test it with HttpUtils2 instead of ImageDownloader. You will still need to handle the JobDone event.

If your server is running a standard Windows OS (not Windows Server) then it might cause such issues. Microsoft deliberately limit the number of concurrent connections allowed.

Click to expand...

Hi Erel,
Have not think of this only 20 connections. Thanks for the hint.

swissmade said:

Hi Erel,
Have not think of this only 20 connections. Thanks for the hint.

Click to expand...

Solve the Problem with this in Registry.
KEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Tcpip\Parameters
add the Key EnableConnectionRateLimiting and set this to about 120. 0 is unlimited
Key has to be a D_Word.

Maybe this can help others too.

Very good tip. I wasn't familiar with this setting.

Always happy to help.