Inconsistend behaviour with custom script at linux

[Ajay-MS]

I am executing a custom script on an azure Linux machine, the custom script is referring to a shell script which has few long-running commands.

I have observed intermittently different behaviors with the output of the command

• Sometimes the long-running command is getting terminated in between without any error.
• Sometimes command failed with error:
  cannot touch '/etc/<application>/repl-force-mysql': Read-only file system

Though, If I execute the same shell script on the terminal of the same machine after login via SSH script is succeeding.

• /var/log/azure/custom-script/handler.log
• /var/log/waagent.log

I didn't see any error in the above-mentioned logs. Please share email Id where I can share these logs.