BUG-13231: YARN RM won't failover if the RPC port is unreachable.
Problem: YARN does not have a service similar to HDFS where the zkfc process monitors the health of the NameNode. Thus, if the RPC port gets blocked the RM service will not failover.
BUG-12327: (YARN-90) NM cannot detect when bad disks become healthy again.
Problem: If you start NM with good log-dir, then rename the directory away, the NM will become unhealthy. If you then rename the directory away, NM will be unhealthy. If you rename the directory back, then wait for some period of time (120 sec), NM won't return to healthy state.
BUG-9919: Shuffle test fails with mapreduce.map.java.opts and mapreduce.reduce.java.opts -Xmx692m
Problem: Shuffle tests fails in ambari with the following configuration:
mapred-site.xml
mapreduce.map.memory.mb 1024
mapreduce.map.java.opts -Xmx692m
mapreduce.task.io.sort.mb 200
Shuffle test is failing with "java.lang.OutOfMemoryError: Java heap space".
