HMC installation currently does not support Hadoop security.
Use of init.d scripts for starting or stopping Hadoop services, is not recommended.
To be able to use Oozie command line client, you must first export JAVA_HOME.
Pig jobs submitted via Templeton fail. The workaround for this issue is available here.
The Sqoop client deployed by HMC does not have the neccessary MySQL connector JAR file. The workaround for this issue is available here.
Pig or MapReduce jobs get incorrect data when reading binary data type from the HCatalog table. For details, see: HCATALOG-430.