Improper lock usage leads to inode overflow in LockLocalStorage implementation

[somnoynadno]

Summary

Behaviour of fasteners.InterProcessLock is pretty weird: class creates a lockfile by provided path, if it doesn't exist, but not manage to remove it after lock is released.

It may lead to uncontrolled lockfiles spam in /tmp folder just because libcloud local driver is not removing this lockfile either.

Detailed Information

This issue encountered in cassandra-medusa v0.15 and lower, which was using apache-libcloud<3.4.0,>=3.3.0 as a dependency.

Please see thelastpickle/cassandra-medusa#528 for more details.

---

Seems like the lightweight fix is to run

                with contextlib.suppress(FileNotFoundError):
                    os.remove(filename)

just right in the exit method.