@Simran Kaur I see from your screenshot that your putHDFS processor is producing bulletins (Red square in upper right corner). If you float your cursor over this red square you will see the bulletin displayed. You can also look for this same error in the nifi-app.log. In many cases the error will be followed by a full stack trace in the nifi-app.log. That stack trace and the error log line may explain what you issue is here. If this does not help, please share your putHDFS processor configuration. Thanks, Matt ... View more

@Oliver Meyn In NiFi cluster, the time that is displayed could come form anyone of the connected nodes. It is important to use NTP on every node in your NiFi cluster to make sure that time stays in sync. As far as timezone differences go, Make sure the symlink for /etc/localtime is pointing at the same /usr/share/timezone/... file on every one of you nIfi nodes. Run the "date --utc" command on all your nodes and compare it to both of the following commands: zdump /usr/share/zoneinfo/EST zdump /usr/share/zoneinfo/US/Eastern If you are looking for EDT time you need to make sure that the symlink for /etc/localtime is point to the following on all yoru nodes: lrwxrwxrwx. 1 root root 25 Dec 1 2014 localtime -> ../usr/share/zoneinfo/US/Eastern Thanks, Matt ... View more

@Simran Kaur All ports 1024 and below are considered reserved as privileged ports and can be only used/bound to by process run by the root user. NiFi can use these ports if it is running as the root user. The alternative is to setup your ListenHTTP processor to run on a non privileged port and then set up port forwarding in your iptables to redirect incoming requests to a privileged port to that non privileged port you are using in NiFi: iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 8081 Thanks, ... View more

@Richard Corfield You can get GC output logs out of NiFi by adding the following lines to NiFi's bootstrap.conf file: java.arg.20=-XX:+PrintGCDetails java.arg.21=-XX:+PrintGCTimeStamps java.arg.22=-XX:+PrintGCDateStamps java.arg.23=-Xloggc:<file> The last entry allows you to specific a separate log file for this output to be written in to rather then stdout. Thanks, Matt ... View more