monitor_metrics.py lslocks doesn't show file path

[hueyvle]

I ran it in centos7 container and opensuse 15 (baremetal), lslocks doesn't show the path of files being locked by p4d. These are locks caused by p4 stats. p4d version 2022.1/2361553

# lslocks -o +BLOCKER
COMMAND           PID  TYPE SIZE MODE  M START END PATH                            BLOCKER
anacron          2723 POSIX   0B WRITE 0     0   0 /var/spool/anacron/cron.weekly  
anacron          2723 POSIX   0B WRITE 0     0   0 /var/spool/anacron/cron.monthly 
p4d              7165 FLOCK   0B READ  0     0   0                                 
p4d              7165 FLOCK   0B READ  0     0   0                                 
p4d              7165 FLOCK   0B READ  0     0   0                                 
rhsmcertd         102 FLOCK   0B WRITE 0     0   0 /run/lock/subsys/rhsmcertd      
lvmetad            97 POSIX   3B WRITE 0     0   0 /run/lvmetad.pid                
crond             101 FLOCK   4B WRITE 0     0   0 /run/crond.pid    

lsof actually displays correctly

p4d       7165      root   18uR     REG              259,1  3984678912   28442608 /opt/perforce/depot/db.revdx
p4d       7165      root   19uR     REG              259,1 23456456704   28442609 /opt/perforce/depot/db.revhx
p4d       7165      root   20uR     REG              259,1  8059305984   28442611 /opt/perforce/depot/db.revsx

R=full file read lock, W=full file write lock
You might consider using lsof as it is more reliable.

[nagonzalez]

@hueyvle : we ran into this issue and patched monitor-metrics.py to collect lock info for p4d commands even if path is null. Would you be interested in that ? Happy to submit PR if so.

[hueyvle]

@nagonzalez Sure, where is your commit?

[nagonzalez]

#49