Why do Spark jobs fail with org.apache.spark.shuffle.MetadataFetchFailedException: Missing an output location for shuffle 0 in speculation mode?

Question

I\'m running a Spark job with in a speculation mode. I have around 500 tasks and around 500 files of 1 GB gz compressed. I keep getting in each job, for 1-2 tasks, the attac

Answer 1

In my case (standalone cluster) the exception was thrown because the file system of some Spark slaves was filled 100%. Deleting everything in the spark/work folders of the slaves solved the issue.