Check File Permissions: Ensure thatthe file foo.yaml has the correct permissions set for the user running the Java process. The file should be accessible by the user under which the Java process is running. You can check the file permissions using the ls -l command in the terminal.

Check Mount Options: Verify that the volume /Volumes/xxxx_volume is mounted with the correct options that allow Java to access the files. Sometimes, volumes mounted with certain options might restrict access to specific users or processes.

Run Java Process with Elevated Privileges: If possible, try running the Java process with elevated privileges (e.g., using sudo) to see if it resolves the permission issue. However, this should be done with caution and only if it is safe and appropriate for your environment.