* @return the job id of the high ram job
* @throws Exception is thrown when the method fails to run the high ram job
*/
public JobID runHighRamJob (Configuration conf, JobClient jobClient,
JTProtocol remoteJTClient,String assertMessage) throws Exception {
SleepJob job = new SleepJob();
String jobArgs []= {"-D","mapred.cluster.max.map.memory.mb=2048",
"-D","mapred.cluster.max.reduce.memory.mb=2048",
"-D","mapred.cluster.map.memory.mb=1024",
"-D","mapreduce.job.complete.cancel.delegation.tokens=false",
"-D","mapred.cluster.reduce.memory.mb=1024",