/TypeScript/RuntimeError: Java gateway process exited before sending its port number site:stackoverflow.com

RuntimeError: Java gateway process exited before sending its port number site:stackoverflow.com

One possible reason is JAVA_HOME is not set because java is not installed.
at sc = pyspark.SparkConf(). I solved it by running

!sudo add-apt-repository ppa:webupd8team/java
!sudo apt-get update
!sudo apt-get install oracle-java8-installer

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