# [FUD_PIDLOCK_FAILURE](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE)

## SYSLOG Details
- **Message**: Unable to lock PID file; another <variable>program-name</variable> was running
- **Help**: fud could not lock PID file
- **Description**: The UDP Forwarding process (fud) attempted to lock the file that records its process ID (PID), which serves to prevent multiple instances of the fud process from running simultaneously. The attempt failed.
- **Type**: Error: An error occurred
- **Severity**: error
- **Cause**: Another instance of the fud process is running.
- **Action**: Check whether another fud process is running, and stop it if appropriate.
- **Attributes**: program-name
- **Facility**: LOG_DAEMON

## Found this message in the following releases:
- [Junos OS 26.2R1](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=26.2R1)
- [Junos OS 25.4R1](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=25.4R1)
- [Junos OS 25.2R2](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=25.2R2)
- [Junos OS 25.2R1](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=25.2R1)
- [Junos OS 24.4R2](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=24.4R2)
- [Junos OS 24.4R1](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=24.4R1)
- [Junos OS 24.2R2](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=24.2R2)
- [Junos OS 24.2R1](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=24.2R1)
- [Junos OS 23.4R2](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=23.4R2)
- [Junos OS 23.4R1](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=23.4R1)
- [Junos OS 23.2R2](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=23.2R2)
- [Junos OS 23.2R1](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=23.2R1)
- [Junos OS 22.4R3](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=22.4R3)
- [Junos OS 22.4R2](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=22.4R2)
- [Junos OS 22.4R1](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=22.4R1)
- [Junos OS 22.2R3](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=22.2R3)
- [Junos OS 22.2R2](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=22.2R2)
- [Junos OS 22.2R1](https://apps.juniper.net/syslog-explorer/?msg=FUD_PIDLOCK_FAILURE&sw=Junos%20OS&rel=22.2R1)