In local mode, can I start another task manager?
Although I tried ./taskmanager.sh start, the number of task manager
at web dashboard didn't change.
The command ./taskmanager.sh start -m localhost:6123 didn't work also.
What should I do? Is it impossible to start multiple task manager in local mode?
To start another taskmanager, you should run the following inside the flink binary directory:
bin/taskmanager.sh start
Which should update the number of taskmanagers on the web dashboard and give you an output like this:
[INFO] 1 instance(s) of taskmanager are already running on my-localhost.
Starting taskmanager daemon on host my-localhost.
From my understanding, you want to set up a standalone cluster in your local machine. If that is the case, you could simply edit the $FLINK_DIST/conf/workers, in which each line represents a TM host. By default, there is only one TM in localhost. In your case, you could add a line 'localhost' to it. Then, execute the $FLINK_DIST/bin/start-cluster.sh, you could see a standalone cluster with two TM in your local machine.
This option wont work for windows. https://lists.apache.org/thread.html/r7693d0c06ac5ced9a34597c662bcf37b34ef8e799c32cc0edee373b2%40%3Cdev.flink.apache.org%3E
