Azure App Service
Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
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App service log files are not being flushed to disk
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(307.2, 43%, 39%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESW%3C/text%3E%3C/svg%3E)
Sam Wheat
501
Reputation points
Please see this question on StackOverflow:
https://stackoverflow.com/questions/65633510/log-file-is-cached-across-service-restarts
I am deploying new builds however the log files for the app service are not being written to disk.
Even after I deploy a new build the only log file I get is for the last build. I have to wait overnight for the log to be flushed to disk. It is not possible for me to diagnose startup errors this way.
Thanks for your help.
Azure App Service
{count} votes
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(147.20000000000002, 55.00000000000001%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
ajkuma 28,036 Reputation points Microsoft Employee Moderator2021-01-11T14:02:53.68+00:00 Sam, I have followed-up with you on the SO thread, will post an update here.
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ajkuma 28,036 Reputation points Microsoft Employee Moderator
2021-01-27T19:30:58.037+00:00 Update: Working with Sam offline/following-up.
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ajkuma 28,036 Reputation points Microsoft Employee Moderator
2021-02-25T11:16:19.997+00:00 Sam, We did not hear from you since our last discussion (offline), when you get a chance please let us know if you need further assistance. Thanks!
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Sam Wheat 501 Reputation points
2021-03-10T23:08:59.353+00:00 Email to Ajay Kumar sent today:
Hi Ajay, I have not had a reason to make any changes to the site until today so I was sure to review this ticket to see if anything changed. After I deployed the changes I took these steps to try to reproduce the issue:
Stop the service
Ftp the log to c: drive
Start the service
Stop the service
Ftp the log to c: driveAs you can see log entries were not saved. Fortunately my site ran without errors. Last time I had to go through this I had errors but I could not tell what they were because I had no logging.
First log:
2021-03-10 22:34:33.159 +00:00 [INF] Ap
2021-03-10 22:39:19.288 +00:00 [INF] Vy
...
2021-03-10 22:41:03.675 +00:00 [INF] Co
2021-03-10 22:50:36.983 +00:00 [INF] ApSecond Log:
2021-03-10 22:34:33.159 +00:00 [INF] A
2021-03-10 22:39:19.288 +00:00 [INF] V
...
2021-03-10 22:41:03.675 +00:00 [INF] C
2021-03-10 22:50:36.983 +00:00 [INF] A
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