Are 'local[n]' pyspark applications effected by the GIL?

Question

Generally python doesn't work well with multi threading because of the Global Interpreter Lock.

Does this affect also pyspark applications running in multi threaded local mode (local[n])?

Answer 1

Parallelization in pyspark is achieved by daemon.py calling os.fork() to create multiple worker processes, so there won't be GIL issues.