Hi Esa, I think having more than one env.execute() is anti-pattern in Flink.
env.execute() behaves differently depending on the env. For local, it will generate the flink job graph, and start a local mini cluster in background to run the job graph directly. For remote case, it will generate the flink job graph and submit it to a remote cluster, e.g. running on YARN/Mesos, the local process might stay attached or detach to the job on the remote cluster given options. So it's not a simple "unstoppable forever loop", and I dont think the "stop env.execute() and then do something and after that restart it" will work in general. But I think you can take a look at savepoints [1] and checkpoints [2] in Flink. With savepoints, you can stop the running job, and do something else, and restart from the savepoints to resume the processing. [1] https://ci.apache.org/projects/flink/flink-docs-release-1.5/ops/state/savepoints.html [2] https://ci.apache.org/projects/flink/flink-docs-release-1.5/ops/state/checkpoints.html Thanks Shuyi On Tue, May 29, 2018 at 3:56 AM, Esa Heikkinen <esa.heikki...@student.tut.fi > wrote: > Hi > > > > Are there only one env.execute() in application ? > > > > Is it unstoppable forever loop ? > > > > Or can I stop env.execute() and then do something and after that restart > it ? > > > > Best, Esa > > > > *From:* Fabian Hueske <fhue...@gmail.com> > *Sent:* Tuesday, May 29, 2018 1:35 PM > *To:* Esa Heikkinen <esa.heikki...@student.tut.fi> > *Cc:* user@flink.apache.org > *Subject:* Re: env.execute() ? > > > > Hi, > > > > It is mandatory for all DataStream programs and most DataSet programs. > > > > Exceptions are ExecutionEnvironment.print() and > ExecutionEnvironment.collect(). > > Both methods are defined on the DataSet ExecutionEnvironment and call > execute() internally. > > > > Best, Fabian > > > > 2018-05-29 12:31 GMT+02:00 Esa Heikkinen <esa.heikki...@student.tut.fi>: > > Hi > > > > Is it env.execute() mandatory at the end of application ? It is possible > to run the application without it ? > > > > I found some examples where it is missing. > > > > Best, Esa > > > -- "So you have to trust that the dots will somehow connect in your future."
