Hi Pierre. Very interesting you ask that. While we do not, when I last performed the service nifi stop/start, I was indeed employing a 'tail -f ./nifi-app.log' so that I could see when the jetty server was ready to support access through the UI. Why do you ask about this?
Jim On Thu, Aug 17, 2017 at 4:14 PM, Pierre Villard <[email protected] > wrote: > 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" <[email protected]> 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 <[email protected]> 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 <[email protected]> >> 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 <[email protected]> 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" <[email protected]> >> 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 >> >>> >> >>> >> >>> >> > >> > >> > > >
