Deploying MVC 6 website to Azure results in 502 error

Question

I had no problems deploying my asp.net 5 / mvc6 site in my Azure / website app environment, but in recent months I have had strange problems.

If I distribute my site on Azure, in 90% of cases the browser will automatically open upon deployment and it will just load in 5 minutes and eventually give me a 502 error or 500 errors for a timeout. I can relocate many times, but it never will work. I can’t tell the difference between the base empty website and my website because the source website with source code will work, but if I make some changes to it with my problematic webpage, it will give an error, but then when I will refund all changes to the problem persist even with the empty hello world website.

None of the codes will ever be used for remote debugging, it is useless, the problem occurs when the application starts.

Update

From what I can say so far, is that it seems to be related to since the same project is working in a new / empty solution. I have the basic folder structure of Soluion Items / src / test / tools, with global.json and .tfignore in solution elements. (tried to remove global.json but nothing changed)

Changed eventlog.xml

View Msvsmon help for more information.</Data><Binary>08005E80</Binary></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-15T18:40:24Z"/><EventRecordID>1002678312</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '6424' failed to start. Port = 11271, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-15T19:40:29Z"/><EventRecordID>1006283437</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '9840' failed to start. Port = 20348, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-15T20:40:41Z"/><EventRecordID>1009895484</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '9796' failed to start. Port = 27433, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-15T21:40:56Z"/><EventRecordID>1013510812</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '7748' failed to start. Port = 33738, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-15T22:41:16Z"/><EventRecordID>1017131093</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '5844' failed to start. Port = 20405, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-15T23:41:43Z"/><EventRecordID>1020757406</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '4208' failed to start. Port = 16859, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-16T00:42:13Z"/><EventRecordID>1024387796</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '8840' failed to start. Port = 23996, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-16T01:42:48Z"/><EventRecordID>1028023000</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '8724' failed to start. Port = 9206, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-16T02:43:29Z"/><EventRecordID>1031663140</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '320' failed to start. Port = 9307, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-16T03:44:14Z"/><EventRecordID>1035308281</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '9540' failed to start. Port = 27060, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-16T04:44:14Z"/><EventRecordID>1038908703</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '8212' failed to start. Port = 31282, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-16T05:44:20Z"/><EventRecordID>1042514234</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '9608' failed to start. Port = 23608, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-16T06:44:30Z"/><EventRecordID>1046124390</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '4216' failed to start. Port = 15739, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-16T07:44:45Z"/><EventRecordID>1049739625</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '3544' failed to start. Port = 13495, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-16T08:45:05Z"/><EventRecordID>1053359796</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '908' failed to start. Port = 6457, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-16T09:45:30Z"/><EventRecordID>1056984968</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '5272' failed to start. Port = 32023, Error Code = '-2147023829'.</Data></EventData></Event><Event><System><Provider Name="HttpPlatformHandler"/><EventID>1000</EventID><Level>0</Level><Task>0</Task><Keywords>Keywords</Keywords><TimeCreated SystemTime="2016-05-16T10:46:01Z"/><EventRecordID>1060615265</EventRecordID><Channel>Application</Channel><Computer>RD0003FF1D2CD5</Computer><Security/></System><EventData><Data>Process '7708' failed to start. Port = 9729, Error Code = '-2147023829'.</Data></EventData></Event></Events> 

My web.config is the default.

  <handlers> <add name="httpPlatformHandler" path="*" verb="*" modules="httpPlatformHandler" resourceType="Unspecified"/> </handlers> <httpPlatform processPath="%DNX_PATH%" arguments="%DNX_ARGS%" stdoutLogEnabled="false" startupTimeLimit="3600"/> 

Answer 1

After fully recreating my solution in the second test solution and adding step by step to the projects and links and trying to find a breakpoint, I noticed that when I added another lib class (quite large) to the solution and reference it from my MVC6 application, he will break. If I deleted the link, it would still be broken, so it would seem to be an unrecorded problem. After some trial and error, I started messing around with links in packages and package folders, and eventually found a problem.

By default, asp.net libs uses the built-in version of Newtonsoft.json version 6.xxx. I added the latest version of Newtonsoft.json (8.xx) to my MVC 6 project, and then deleted the (old) newtonsoft folders / files from the wrap and packages folder.

It was also changed to DNX46 instead of 451 (previously tried, but did not make a difference in the question).

The assembly will be broken initially after deleting 6.xxx files, but rebooting Visual Studio will fix this.

After these steps, I turned to Azure and it worked. I tried this fix in several solutions now that they had the same problem and it seems like a solid fix.

It is possible that there is something in my lib reference class that causes this version issue, since creating a new solution with an empty libs / mvc-projects class will work fine, but I'm glad this is allowed anyway.

Answer 2

It looks like you might run into some restrictions regarding a timeout or other related issue. And performance, for sure. Try moving your web application to a more powerful mode, like standard, and see if that helps. Further, it is not so simple to say the reason 500/502. An official guide exists to resolve these errors.

I would start by including detailed diagnostics, as described here and here, and see if there are any things in the logs. In addition, some logs are available through the Kudu console ( http://webappname.scm.azurewebsites.net , pay attention to SCM) in the Debug console in the LogFiles console.