Web App restarting randomly

Question

La webapp è da settimane che smette di lavorare randomly. Non sembra essere un problema di cpu o di memoria che rimangono sotto il massimo.

Questo l'errore

File server volume path change was found

Description	Your application was recycled due to an intermittent Azure infrastructure issue while accessing remote file storage. This can happen due to multiple reasons like platform instances getting upgraded or instance(s) experiencing high latencies accessing the remote storage. In case the instance(s) where your application is running is experiencing high latencies accessing remote storage, platform tries to heal your application by switching to different remote storage which is having low latency. This can also cause the application process to restart.
Description	Your application was recycled due to an intermittent Azure infrastructure issue while accessing remote file storage. This can happen due to multiple reasons like platform instances getting upgraded or instance(s) experiencing high latencies accessing the remote storage. In case the instance(s) where your application is running is experiencing high latencies accessing remote storage, platform tries to heal your application by switching to different remote storage which is having low latency. This can also cause the application process to restart.
Timestamp	2025-04-01 00:53 UTC

Answer 1

Hello @Mavi ,

After detailed investigation, we’ve identified the following contributing factors to the app restarts and downtime for brandiving:

 Azure File System Path Change:

 The message “File server volume path change” indicates that Azure has changed the underlying network-mounted storage path—typically triggered by platform maintenance or latency. When this happens, Azure reboots the app to remount the new file system path.

Low Swap Space:

 Our monitoring tools show that brandiving experienced swap space dropping below 800MB. Low swap availability, especially under memory pressure, can lead to instability and app restarts.

 The swap usage per process can be estimated with:

 SWAP = VIRT - RES.

Auto-Heal Not Enabled:

 Auto-Heal is not currently enabled on the app. Enabling this can help proactively restart the app when it encounters high memory usage, specific HTTP errors, or slow responses.

 Recommendations:

 • Monitor swap usage using Linux memory tools or Azure diagnostics.

 • Consider scaling to a higher SKU if memory demands are consistently high.

 • Enable Auto-Heal with custom rules if needed.

 • Use the Diagnose and Solve Problems tool for memory and restart analysis: Diagnose App Restart Issues

 For more details refer this App Services on Linux Rebooting due to Memory Limits link

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