why upstart script not logging to log file?

There are a few potential reasons why an Upstart script might not be logging to a log file as expected:

  1. The script might not have a console or output stanza that specifies where the log output should go. For example:
console output
  1. The script might be attempting to write to a log file that is not writable by the user or group running the script. In this case, you might need to change the permissions on the log file or the directory containing it.
  2. The script might be using a logging utility that is not configured to write to a file. For example, if the script is using the logger command to write messages to the system log, you might need to configure the system logger to write to a file.
  3. There might be a problem with the log file itself, such as it being deleted or moved. In this case, you might need to recreate the log file or update the script to point to the correct location.

To troubleshoot this issue, you might want to try the following:

  1. Check the Upstart script to make sure it has a console or output stanza that specifies where the log output should go.
  2. Check the permissions on the log file and the directory containing it to make sure the script has permission to write to the file.
  3. Check the script to make sure it is using a logging utility that is configured to write to a file.
  4. Check the log file to make sure it still exists and has not been moved or deleted.

If you are still having trouble, you might want to try running the script with the initctl command, which allows you to see the output and error messages that are generated when the script is run. For example:

initctl start myscript
Here are a few additional things you might want to consider when troubleshooting an Upstart script that is not logging to a log file as expected:

Check the log file's size and make sure it has not reached its maximum size. If the log file is full, the script may not be able to write to it. In this case, you might need to rotate the log file or increase its size.

Check the system logs for any messages related to the Upstart script or the log file. These messages might provide additional information about the cause of the problem.

Check the script for any syntax errors or issues that might prevent it from running correctly. You can use the init-checkconf command to check the syntax of an Upstart script.

Check the system's resource usage to make sure it is not running low on memory or other resources. If the system is experiencing resource constraints, the script may not be able to run or write to the log file as expected.

If the script is using a logging utility, such as syslog-ng or rsyslog, check the configuration of the utility to make sure it is set up to write to a file.

If you have made any recent changes to the system, such as installing new software or upgrading the operating system, these changes might have affected the Upstart script or the log file. You might want to try rolling back these changes to see if they are the cause of the problem.

I hope these suggestions are helpful. If you are still having trouble, you might want to try posting a question on a forum or online community where other users and experts can offer additional guidance and support.

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