no. It did not work. I also created a Sink that is a MQTT publisher ( https://github.com/felipegutierrez/explore-flink/blob/master/src/main/java/org/sense/flink/mqtt/MqttSensorPublisher.java) and on my eclipse it works. When I deploy my job on my Flink cluster it does not work. It might be something wrong with my cluster configuration.
Something that I did was comment the line "# 127.0.1.1 ubuntu16-worker01" on the "/etc/hosts" file in order to the JobManager find the TaskManager. I commented on this line also on the master node. The master is my machine and the worker is a virtual machine. *--* *-- Felipe Gutierrez* *-- skype: felipe.o.gutierrez* *--* *https://felipeogutierrez.blogspot.com <https://felipeogutierrez.blogspot.com>* On Fri, Apr 5, 2019 at 2:50 PM Chesnay Schepler <ches...@apache.org> wrote: > This kind of sounds like a Outputstream flushing issue. Try calling > "System.out.flush()" now and then in your sink and report back. > > On 04/04/2019 18:04, Felipe Gutierrez wrote: > > Hello, > > I am studying the parallelism of tasks on DataStream. So, I have > configured Flink to execute on my machine (master node) and one virtual > machine (worker node). The master has 4 cores > (taskmanager.numberOfTaskSlots: 4) and the worker only 2 cores > (taskmanager.numberOfTaskSlots: 2). I don't need to set this on the > 'conf/flink-conf.yaml', this was just to ensure that I am relating the > properties with the right concepts. > > When I create a application with parallelism of 1, 2, or 4, sometimes I > can see the output of the "print()" method, other times no. I checke the > output files of the task managers ("flink-flink-taskexecutor-0-master.out" > or "flink-flink-taskexecutor-0-worker.out") and I cancel the job and start > it again. All of sudden I can see the output on the .out file. > I was thinking that it was because I am creating a job with more > parallelism that the cluster supports, but this behavior also happens when > I set the parallelism of my job to less than the slots available. > > I guess if I see on the Flink dashboar X Task slots available and when I > deploy my Job, the Job is running and the slots available decreased > according to the number of parallelims of my Job, everything should be > correct, doesn't it? I also created a Dummy Sink just to print the output, > but the behavior is the same. > > Here is my code: > https://github.com/felipegutierrez/explore-flink/blob/master/src/main/java/org/sense/flink/examples/stream/MqttSensorRandomPartitionByKeyDAG.java#L48 > > Thanks, > Felipe > *--* > *-- Felipe Gutierrez* > > *-- skype: felipe.o.gutierrez * > *--* *https://felipeogutierrez.blogspot.com > <https://felipeogutierrez.blogspot.com>* > > >
