So I've got an HTTP Service and after about 25,000-35,000 connections in a live environment, I start to get "EOutofMemory" errors and eventually the OnListenException event starts getting triggered with "Thread creation error: Not enough storage is available to process this command". 

Eventually the service just can't accept any new connections and we get other evidence if resource limitation issues in the main service thread and anything that attempts to write to the disk. 

Now there are plenty of EIdOSSLAcceptError and EIdSocketError (usually 10054, 10053 or 10060) triggered in the generic HTTP Exception handler. I've recently updated from 1.0.1t to 1.0.2s on the openssl side to see if it mitigates some of these ssl protocol errors. Anyhow, trapped inside my OnCommandGet Handler, the most common exception (Socket Error #10054. Connection reset by peer.) is around a GET request that serves up an image via SmartServeFile. But it's not specific to any one image and it's intermittent and not something I've been able to trigger in the development environment, we figure the client just drops connection before SmartServe can complete and this is what it looks like when it happens. Most of the 'heavy lifting' for the service happens in a POST process.

Now I've tried creating some exceptions in my OnCommandGet handler (sending bad data) to see if I'm cleaning up in my try/finally and exceptions and it all looks good. Eurekalog doesn't report any leaked memory and my thread count stays stable. 

In the live environment, I see the service is steadily growing in thread count. Seems to die somewhere around 1500 threads after about 6-10hrs depending on traffic, however plenty of hardware resources left (RAM and SSD). A simple restart of the service works just fine. So this implies there's a bunch of orphaned threads. Looking at process monitor, I can see hundreds of threads what would likely have started as CommandGet connection threads, still existing from HOURS ago. CPU utilization is very low, and the application handling these thousands of connections doesn't use up much cycles... so it doesn't appear these threads are stuck in any kind of loop. The Stack for all of these 'old' threads just shows:

ntoskrnl.exe!KeSynchronizeExecution+0x5bd6
ntoskrnl.exe!KeWaitForMultipleObjects+0x109d
ntoskrnl.exe!KeWaitForMultipleObjects+0xb3f
ntoskrnl.exe!KeWaitForMutexObject+0x377
ntoskrnl.exe!KeQuerySystemTimePrecise+0x881
ntoskrnl.exe!ObDereferenceObjectDeferDelete+0x28a
ntoskrnl.exe!KeWaitForMultipleObjects+0x1284
ntoskrnl.exe!KeWaitForMultipleObjects+0xb3f
ntoskrnl.exe!KeWaitForMutexObject+0x377
ntoskrnl.exe!NtWaitForSingleObject+0xf8
ntoskrnl.exe!_setjmpex+0x68a3
wow64cpu.dll!TurboDispatchJumpAddressEnd+0x540
wow64cpu.dll!TurboDispatchJumpAddressEnd+0x3a5
wow64.dll!Wow64KiUserCallbackDispatcher+0x4151
wow64.dll!Wow64LdrpInitialize+0x120
ntdll.dll!LdrInitializeThunk+0x16d
ntdll.dll!LdrInitializeThunk+0xe

None of which is my windows service (obviously), but it suggests the thread(s) are still alive.

I'm wondering how I can dig deeper into these seemingly orphaned threads to figure out how they got orphaned. Even with the EIdOSSLAcceptError and EIdSocketError's the number of those that occur, do not accumulate to the number of threads. And yes, I'm re-raising EIdExceptions in my handlers. 

Any ideas would be appreciated. 

Indy version is 10.6.1.5182 on XE7. 

Basic service structure is in the OnCommandGet is...

Ti there,

I am just wondering if Indy Supports SSL? If so could someone possible post an example in C++?

Thanks,

MusicBuddha

I am working on a C++ project that was using Indy 9 and now uses Indy 10 to talk to device controllers that use a proprietary encryption method. 

In Indy 9 a TMemoryStream object was used that included the TCP Packet header and we could read and set the TCP headers bytes directly.   Indy 10 uses a TIdBytes instead of TMemoryStream and I cannot figure out any way to manipulate the TCP Packet header bytes to get the same results.

Is there a component I should be looking at?  Documentation or a post somewhere that might help me?

intraweb 14

If a user tries to open file my-domain/file.htm they get the standard intraweb message 404. I have had no luck changing it with my custom html page.

intraweb 14

I have used a method to check server state with onAsyncTimer installed on browsers. Every second browser timer fires a question to the server. This takes too much traffic for 100 browser connected. How to implement that to push data to browser when for example server side timer detects a change and needs to notify browser to refresh its page.

Hallo,
I have problems in converting HTML to PDF. The reason, I think, is that the height of the form (delphi) differs from HTML height. Infact Delphi sees wrapped labels as 1 line. 
Normally I set Form Height as the top of the last line but it seems not to be possible with wrapped labels. 
I tried calculating the height of wrapped labels in JavaScript and posted the value in a label of the screen. I see the value but when I read  that value (on click) it returns empty. 
Any suggestion?
Is there another way to resize the form with the correct height?
Best regards

In my template not visible TIWWebOSMaps

<div class="container-fluid"> 
    <div class="row">
         <div class="col">  
              {%OSMap%}
        </div>
    </div>
</div>

Config MapOptions is Ok.
RenderStatus, RenderVisible, RenderZIndex = true ... other false;

After updating to  IW 15.0.22 the Async events have stopped working for TMS controls. Updated to 15.0.23 but the problem exists.

Hi,

there is a new update available, version 15.0.23. It contains a fix for a recently introduced bug regarding IWForm's OnAsyncResize/OnResize events.

https://www.atozed.com/2019/06/intraweb-15-0-23/

Cheers

Hi ,

i´ve  found a strange effect after switching my Intraweb program from Delphi Tokyo Intraweb 14 to Delphi RIO Intraweb 15.0.22.

When the first IWForm (a login dialog) opens in browser none of the onclick events work.

Javascripterror :

IWBase__ED495B2B5.js:2 Error in IW.Session.execSyncResize(): urlAddSessionParams is not defined
consoleError @ IWBase__ED495B2B5.js:2
execSyncResize @ IWBase__ED495B2B5.js:4
(anonymous) @ IWBase__ED495B2B5.js:4
setTimeout (async)
doSyncResize @ IWBase__ED495B2B5.js:4
IWCL_TriggerResize @ IWBase__ED495B2B5.js:5
DoSecondResize @ IWGecko__ED495B2B5.js:1
(anonymous) @ IWBase__ED495B2B5.js:4

If i press F12 in Firefox and connect to my server again Onclick is submitted one time .

Sometimes (after  10-20 tries restarting server) Onclick works normaly. I was able to login and after than
all onclicks on all other forms works correct until i log off.  

i´ve made a simple form with only some buttons and edits and use this as mainform. Onclick in this from works.




Any idea ?