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Here Start means = Creation of socket from scratch.</div>
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1<sup>st</sup> Start - Socket Created.</div>
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Stop - Socket Stopped</div>
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2<sup>nd</sup> Start - Re-creating the Socket</div>
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Since at 2<sup>nd</sup> Start Socket is re-created, we must dispose the socket after stop. That is for sure and if I do that all good.</div>
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Only question is whether or not terminate and remove the sessions to avoid any resource/memory leak.</div>
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Thanks,</div>
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Somnath</div>
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<b>From:</b> somnath pal <palsomnath@hotmail.com><br>
<b>Sent:</b> Thursday, July 10, 2025 10:15<br>
<b>To:</b> Mailing list for QuickFIX/n <quickfixn@lists.quickfixn.com><br>
<b>Subject:</b> Re: {{Quickfixn}} Sending Email Message Problem </div>
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Already sent you the config file. I am using latest version (.net8) Here are the steps:</div>
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Winform (C#) application with 2 buttons.</div>
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Start Button Click - Starting the acceptor</div>
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Stop Button Click - Stooping the acceptor</div>
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Clicked on Start Button - no issues</div>
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Clicked on Stop Button - no issues</div>
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Now Click on Start Buton again - Error - "The process cannot access the file store\FIX.4.2-FIX_DRE-FWA.header' because it is being used by another process."</div>
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If I dispose the acceptor thread, after stop - error doesn't come.</div>
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I have created a FIX Engine 20 years back (that time only C# wrapper over C++) and never encountered this. The product is working great in production since then. Now I have to add SSL and after migrating to .Net8 core package this is happening.</div>
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Thanks,</div>
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Somnath</div>
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<b>From:</b> Quickfixn <quickfixn-bounces@lists.quickfixn.com> on behalf of Grant Birchmeier <gbirchmeier@connamara.com><br>
<b>Sent:</b> 10 July 2025 00:23<br>
<b>To:</b> Mailing list for QuickFIX/n <quickfixn@lists.quickfixn.com><br>
<b>Subject:</b> Re: {{Quickfixn}} Sending Email Message Problem</div>
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<div style="direction: ltr; font-size: 9.75pt; color: rgb(0, 0, 0);">I believe Stop() and Start() should just work. (Are you using the most recent release?)</div>
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<div style="direction: ltr; font-size: 9.75pt; color: rgb(0, 0, 0);">I think you are being mislead by GetSessionIDs(). These are maintained internally by QF, and how the Initiator and Acceptor maintains them are probably different. I have worked with QF/n
for 10+ years and I don't think I've ever thought to examine GetSessionIDs() closely in the way that you are doing. It's not just not relevant.</div>
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<div style="direction: ltr; font-size: 9.75pt; color: rgb(0, 0, 0);">So my advice is:<br>
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<div style="direction: ltr; font-size: 9.75pt; color: rgb(0, 0, 0);">* Stop looking at GetSessionIDs(), and do NOT call RemoveSession()! Forget this approach altogether.</div>
<div style="direction: ltr; font-size: 9.75pt; color: rgb(0, 0, 0);">* <b>Look at your message and event logs!</b> Use a FileLogFactory. Tell me
<u>specifically</u> what you see in those logs.</div>
<div style="direction: ltr; font-size: 9.75pt; color: rgb(0, 0, 0);">* Next time you reply, show me your config files (minus any sensitive information).</div>
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<div style="direction: ltr; font-size: 9.75pt; color: rgb(0, 0, 0);">-Grant</div>
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<div style="direction: ltr;">On Wed, Jul 9, 2025 at 12:41 PM somnath pal <<a href="mailto:palsomnath@hotmail.com" id="OWA6dc4a096-40be-b121-748e-6fc157457a96" class="OWAAutoLink">palsomnath@hotmail.com</a>> wrote:</div>
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I did the followings. Are these correct way to do this or there is a better way?</div>
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DualEngineAcceptor.Stop(true);</div>
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//Check if all sessions are terminated and removed</div>
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var sessionList = DualEngineAcceptor.GetSessionIDs();</div>
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if (sessionList.Count > 0)</div>
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{</div>
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//Sessions are still attached</div>
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foreach (var sessionId in sessionList)</div>
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{</div>
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//Terminate and remove</div>
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if (sessionId != null) DualEngineAcceptor.RemoveSession(sessionId, true);</div>
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}</div>
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}</div>
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//Dispose</div>
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DualEngineAcceptor.Dispose();</div>
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DualEngineAcceptor = null;</div>
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Thanks,</div>
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Somnath</div>
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<b>From:</b> Quickfixn <<a href="mailto:quickfixn-bounces@lists.quickfixn.com" id="OWAcb95fb5d-c338-1e58-bf1c-33128cda068a" class="OWAAutoLink">quickfixn-bounces@lists.quickfixn.com</a>> on behalf of Grant Birchmeier <<a href="mailto:gbirchmeier@connamara.com" id="OWA9c5eb907-87d2-4752-8dd4-127932c6a0bb" class="OWAAutoLink">gbirchmeier@connamara.com</a>><br>
<b>Sent:</b> 09 July 2025 20:58<br>
<b>To:</b> Mailing list for QuickFIX/n <<a href="mailto:quickfixn@lists.quickfixn.com" id="OWAe71d8e19-4996-7d39-d0c5-7eef584941b9" class="OWAAutoLink">quickfixn@lists.quickfixn.com</a>><br>
<b>Subject:</b> Re: {{Quickfixn}} Sending Email Message Problem</div>
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<div style="direction: ltr; font-size: 9.75pt; color: rgb(0, 0, 0);">When you say "it removes the session," do you actually mean it
<u>resets</u> the sessions?</div>
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<div style="direction: ltr; font-size: 9.75pt; color: rgb(0, 0, 0);">If yes, it sounds like it may be related to your "ResetOn<X>" configurations.</div>
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<span style="font-family: Slack-Lato, appleLogo, sans-serif; font-size: 13px; color: rgb(29, 28, 29); background-color: white;">This email, along with any attachments, is confidential. If you believe you received this message in error, please contact the sender
immediately and delete all copies of the message. Thank you from Connamara Systems, LLC.</span></div>
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<div style="direction: ltr; width: 105px; height: 83px; display: inline-block;"><a href="https://www.connamara.com" id="OWAe125f01b-a913-b82e-adbf-ab6ac1d90e36" class="OWAAutoLink" data-auth="NotApplicable"><img width="105" height="83" style="width: 105px; height: 83px; margin-top: 0px; margin-left: 0px;" src="https://lh4.googleusercontent.com/1ZKItKWIoLUepUXvEXgEeZWBlntjas7UxLPLuLLnsApbxAcRepKELA_SwZBe1BWEZ3huC6sJdz2ZzvUYLNgu56Zcm8bo2R_iLzXZVjDmMo67675iop6mEMOg_Y6q8Mtz7ylOW9t8RazXt-tyJtEyhE0"></a></div>
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<span style="font-family: Archivo, sans-serif; font-size: 11pt; color: rgb(0, 65, 107);">Grant Birchmeier</span></p>
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<span style="font-family: Archivo, sans-serif; font-size: 11pt; color: rgb(0, 65, 107);">Director of Engineering, Connamara</span></p>
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<span style="font-family: Archivo, sans-serif; font-size: 11pt; color: rgb(0, 65, 107);"><a href="mailto:gbirchmeier@connamara.com" id="OWA71e6afb3-4a6b-405a-bdc1-b26003c97d0a" class="OWAAutoLink" style="margin-top: 0px; margin-bottom: 0px;">gbirchmeier@connamara.com</a></span></p>
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immediately and delete all copies of the message. Thank you from Connamara Systems, LLC.</span></div>
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