should help you out Technical Background The Moment you add your Service-Worker (along all other PWA-Requirements) your App gets created as an Real PWA - with Web-APK getting installed. Therefore you also need to use Default-HTTPS-Port 443 - make sure you use a valid HTTPS-Certificate.
may help you . The number of the CPU/cores a worker uses is given as an environment variable at start time, and you could set it in two places: In conf/spark-env.sh as SPARK_WORKER_CORES. As an command line argument when you start a worker daemon as --cores 4.
How to allocate more executors per worker in Standalone cluster mode?
wish helps you You first need to configure your spark standalone cluster, then set the amount of resources needed for each individual spark application you want to run. In order to configure the cluster, you can try this:
val conf = new SparkConf()
Writing Parquet file in standalone mode works..multiple worker mode fails