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How to fix the error "futex facility returned an unexpected error code"?

Published on April 13th, 2022

If a futex facility returns an unexpected error code, it means that there was an error in the way the facility was used. This can happen if the facility is not used correctly, or if there is a problem with the facility itself.

1. Check for any updates to the futex facility

  1. Check for any new kernel releases that might have a futex fix.
  2. Check for any new kernel patches that might have a futex fix.
  3. Check for any new futex documentation.
  4. Check for any updated futex packages.
  5. Check for any updated kernel drivers.
  6. Check for any updated userspace tools.

2. Try running the program with a different user account

First you need to identify the user account that is causing the issue. To do this, you can use the getent command to get a list of all the user accounts on the system. You can then use the id command to identify the user account that is causing the issue. Next, you need to change the user account that is causing the issue. To do this, you can use the chsh command to change the user account's password. Then, you can use the sudo command to run the program with the new user account. Finally, you can use the futex command to try to fix the futex facility. If the futex facility still returns an unexpected error code, then you may need to contact the administrator for further help.

3. Make sure that the program is not running as root

In order to make sure that the program is not running as root, first ensure that the user is logged in as the correct user. If the user is not logged in as the correct user, then the program may be running as root. To determine the user's login name, use the getent passwd command. Next, use the chown command to change the user's ownership of the directory containing the program. Finally, use the su command to become the user's login name.

If you didn't find success with an option above, then try:

  1. Check for any file permissions issues.
  2. Try using a different futex implementation.
  3. Check for any kernel bugs.
  4. Try using a different futex API.