After setting up a new Spark cluster running on Yarn, I've come across an error…
While running spark jobs, you may come across java.io.IOException: org.apache.spark.SparkException: Failed to get broadcast_0_piece0 of broadcast_0 error with below stack trace. This error occurs when you try to create multiple spark contexts. In another case, when I tried to crate SparkContext and Streamingcontext from scratch I was getting this error. Below is the code how to create StreamingContext from existing Sparkcontext.
If you are getting below exception while setting up Cassandra cluster, please follow below steps…
Are you getting WARNING: "HADOOP_PREFIX has been replaced by HADOOP_HOME. Using value of HADOOP_PREFIX. ? for every command you issue on a cluster, follow below step to resolve it.
When your datanodes are not starting due to java.io.IOException: Incompatible clusterIDs error, means you have formatted namenode with out deleting files from datanode.