Caused by: java.lang.OutOfMemoryError: GC overhead limit exceeded   Increase the container and heap size.  I am not sure whether it is a mapper or reducer that is failing but here are the settings to look into.   set hive.exec.reducers.bytes.per.reducer= set mapreduce.map.memory.mb= set mapreduce.reduce.memory.mb= set mapreduce.map.java.opts=<roughly 80% of container size> set mapreduce.reduce.java.opts=<roughly 80% of container size> ... View more