Hi James, Out of curiosity do you have a TailFile processor configured to tail the NiFi log file?
Thanks Le 17 août 2017 22:11, "James McMahon" <jsmcmah...@gmail.com> a écrit : Thank you Joe. I agree and will monitor it closely going forward. I suspect there were some external factors at play here. On Thu, Aug 17, 2017 at 4:05 PM, Joe Witt <joe.w...@gmail.com> wrote: > Ok if 50,000 is the max then i'm doubtful that it ran out. > > In the event of exhaustion of allowed open file handle count NiFi will > run but its behavior will be hard to reason over. That means it > cannot create any new files or open existing files but can merely > operate using the handles it already has. It is a situation to avoid. > > As far as what actually happened resulting in logfile issues it is not > easy to tell at this stage but should be monitored for system state > when it happens again. > > Thanks > > > On Thu, Aug 17, 2017 at 1:02 PM, James McMahon <jsmcmah...@gmail.com> > wrote: > > 50,000. > > Is NiFi robust enough that it can continue to run without the log file > for > > write attempts? > > It is back up and running like a champ now, so I will keep an eye on it. > > > > On Thu, Aug 17, 2017 at 3:40 PM, Joe Witt <joe.w...@gmail.com> wrote: > >> > >> It sounds like a case of exhausted file handles. > >> > >> Ulimit -a > >> > >> How many open files are allowed for the user nifi runs as? > >> > >> On Aug 17, 2017 12:26 PM, "James McMahon" <jsmcmah...@gmail.com> wrote: > >>> > >>> Our nifi instance appeared to be running fine but we noticed that there > >>> were no log files for today in the logs subdirectory. We could not > find any > >>> nifi logs for today anywhere on our system. > >>> > >>> I was surprised that NiFi continued to run. Has anyone experienced such > >>> behavior? > >>> > >>> How is NiFi able to continue to run without a nifi-app.log - do all its > >>> log messages effectively go to bit bucket heaven? > >>> > >>> I ultimately did an orderly shutdown via > >>> service nifi stop > >>> and an orderly start via > >>> service nifi start > >>> after which the log files were there as expected. > >>> > >>> Thanks in advance for any insights. -Jim > >>> > >>> > >>> > > > > >
