<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta name="Generator" content="Microsoft Word 15 (filtered medium)"> <style></style> </head> <body lang="EN-US" link="blue" vlink="purple"> <div class="WordSection1"> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thank you, Tom! I think you may be onto something. The link you’ve provided seems rather informative. Some of it went over my head, but I’m sure some of my colleagues will be able to comprehend it better than I did.<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I just wanted to follow up with some more information and screenshot from avahi-discover (see attached), regarding what is happening.<o:p></o:p></span></p> <p class="MsoListParagraph" style="margin-left:20.25pt;text-indent:-.25in;mso-list:l0 level1 lfo1"> <![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman""> </span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">We have several machines (in screenshot they are cpcssil1, sil1, and avlab2u). <o:p></o:p></span></p> <p class="MsoListParagraph" style="margin-left:20.25pt;text-indent:-.25in;mso-list:l0 level1 lfo1"> <![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman""> </span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Each machine can have many instances of a UI Server running.<o:p></o:p></span></p> <p class="MsoListParagraph" style="margin-left:20.25pt;text-indent:-.25in;mso-list:l0 level1 lfo1"> <![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman""> </span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">UI Server publishes itself as a service on the network. <o:p></o:p></span></p> <p class="MsoListParagraph" style="margin-left:20.25pt;text-indent:-.25in;mso-list:l0 level1 lfo1"> <![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman""> </span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The service name is always unique in a format of UIS_<hostname>_<username>_<port>. I’m aware of a service name conflict resolution, and that is handled via adding ‘#2’ to the service name.<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">In the screenshot, you can see that there are 2 services running on cpcssil1 and 2 services running on avlab2u. I didn’t capture it in a screenshot, but the Address for those is shown correctly in avahi-discover as “cpcssil1.local” and “avlab2u.local”. <o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">When a user runs a Login Client (the client has the discovery), it will correctly pick up all the services, and if it will have no problem connecting to “avlab2u:30007”.<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Also in the screenshot, you can see that the highlighted sil1 machine, has the address of “sil1-2.local” which is not correct. If you try to ping sil1-2, it does not exist. If you try to connect to sil1-2:30003, it does not exist.<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Do you still suspect that the issue is due to the conflict resolution? Do you think adding a flag</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F4E79;mso-style-textfill-fill-color:#1F4E79;mso-style-textfill-fill-alpha:100.0%"> “</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F4E79;mso-style-textfill-fill-color:#1F4E79;mso-style-textfill-fill-alpha:100.0%;background:white">AVAHI_PUBLISH_ALLOW_MULTIPLE - For raw records: Allow multiple local records of this type, even if they are intended to be unique.” Might solve the issue? </span> <span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thank you,<o:p></o:p></span></p> <p class="MsoNormal"><b><span lang="EN-CA" style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif;color:navy">Denis<o:p></o:p></span></b></p> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p> <div> <div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in"> <p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> avahi [mailto:avahi-bounces@lists.freedesktop.org] <b>On Behalf Of </b>Tom Pusateri<br> <b>Sent:</b> Monday, June 19, 2017 7:27 PM<br> <b>To:</b> Avahi ML <avahi@lists.freedesktop.org><br> <b>Subject:</b> Re: [avahi] Published service gets incorrect address<o:p></o:p></span></p> </div> </div> <p class="MsoNormal"><o:p> </o:p></p> <p class="MsoNormal">Without more information, this sounds like normal naming conflict resolution as described in:<o:p></o:p></p> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal"><a href="https://tools.ietf.org/html/rfc6762#page-31">https://tools.ietf.org/html/rfc6762#page-31</a><o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">Another host on the link local network is using the same name and so your name is made unique by appending “-2”.<o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">Sometimes, this occurs when a single host has multiple interfaces on the same link local network (like wired and wireless ethernet) or when there are bugs in the conflict resolution implementations.<o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">This is harmless as long as your host is correctly resolving this name with the “-2” appended.<o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">If you have mdns name resolution configured, you can ping (or ping6 if appropriate) "<name>-2.local” to see if it is resolving ok.<o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">By killing the avahi-daemon, it is probably starting to use <name> again until conflict resolution kicked in and causes the name change to append the “-2”.<o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">If this is not accurate, please send more detailed info (logs, packet traces, etc.).<o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">Thanks,<o:p></o:p></p> </div> <div> <p class="MsoNormal">Tom<o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> <div> <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"> <div> <p class="MsoNormal">On Jun 19, 2017, at 9:51 AM, Denis Kharlamov <<a href="mailto:dkharlamov@aversan.com">dkharlamov@aversan.com</a>> wrote:<o:p></o:p></p> </div> <p class="MsoNormal"><o:p> </o:p></p> <div> <div> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Hello,<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">I’m experiencing a peculiar issue with my avahi where the address of the published service gets a “-2” appended to it.<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">My use of Avahi is essentially this:<span class="apple-converted-space"> </span><a href="http://www.avahi.org/doxygen/html/client-publish-service_8c-example.html"><span style="color:#954F72">http://www.avahi.org/doxygen/html/client-publish-service_8c-example.html</span></a><o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">The service always gets published without fail, with the correct service name, and TXT records. However, the address that avahi-discover shows, has a -2 appended to it.<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">I am not sure why, because in code I am passing a null pointer for the host, as per documentation:<o:p></o:p></span></p> </div> <div> <p class="MsoNormal" style="line-height:16.5pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">“</span><span style="font-size:10.5pt;font-family:"Arial",sans-serif">The host this services is residing on. We recommend to pass NULL here, the daemon will than automatically insert the local host name in that case”</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">The only way I’ve been able to resolve this is by killing the avahi-daemon and restarting it. Does anyone have any idea as to what could be causing this behavior?<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Thank you,<o:p></o:p></span></p> </div> <div> <p class="MsoNormal" style="line-height:12.0pt"><b><span lang="EN-CA" style="font-size:10.0pt;font-family:"Trebuchet MS",sans-serif;color:navy">Denis Kharlamov</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p> </div> <p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif">_______________________________________________<br> avahi mailing list<br> </span><a href="mailto:avahi@lists.freedesktop.org"><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:#954F72">avahi@lists.freedesktop.org</span></a><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif"><br> </span><a href="https://lists.freedesktop.org/mailman/listinfo/avahi"><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:#954F72">https://lists.freedesktop.org/mailman/listinfo/avahi</span></a><o:p></o:p></p> </div> </blockquote> </div> <p class="MsoNormal"><o:p> </o:p></p> </div> </div> </body> </html>