From Tomasz Balawajder:
"Since we are using a Java service to launch the Python process, its behavior differs from running the script directly on the cluster.
By default, Dask uses fork() to create worker processes. However, when running under the JVM, the start method defaults to spawn, which does not share memory between processes. This caused the slowdown and unexpected behavior.
I’ve forced Python to use fork() in the configuration, and now the application completes in the same time as when executed with sbatch."
Previously, user could enter a value enter the custom rate box, enable "activity rate estimation" and the custom rate box would disappear but the program would still see the value previously entered and use it even though it was no longer visible in the user interface
ftong