Apache Hadoop MapReduce Core errors

A software framework for easily writing applications which process vast amounts of data in-parallel on large clusters of commodity hardware in a reliable, fault-tolerant manner

https://hadoop.apache.org/docs/r1.2.1/mapred_tutorial.html
Solution coverage:
Summary coverage:

Nothing to list here.
Package nameClass namePatterns foundSolution coverageSummary coverage
org.apache.hadoop.mapreduce.lib.mapWrappedMapper$Context5
Package nameClass nameMethod namePatterns foundSolution coverage
org.apache.hadoop.mapreduce.lib.mapWrappedMapper$Contextwrite3
org.apache.hadoop.mapreduce.lib.mapWrappedMapper$ContextnextKeyValue1
org.apache.hadoop.mapreduce.lib.mapWrappedMapper$ContextgetCounter1
Package nameClass nameMethod nameException TypePatterns foundSolution coverage
org.apache.hadoop.mapreduce.lib.mapWrappedMapper$ContextwriteIOException1
org.apache.hadoop.mapreduce.lib.mapWrappedMapper$ContextwriteOutOfMemoryError1
org.apache.hadoop.mapreduce.lib.mapWrappedMapper$ContextwriteNullPointerException1