MapReduce doens't run when i tried install hadoop (CDH4) on Centos 6 (minimal) using Cloudera Manager (Free Edition)

I tried install full package include: HBase, HDFS, Hue, MapReduce, Oozie, ZooKeeper

But on start MapReduce I got error that JobTracker doesn't want to run.

After a few hours I found in log /var/log/hadoop-0.20-mapreduce/hadoop-cmf-mapreduce1-TASKTRACKER-localhost.localdomain.log.out this row:

 INFO org.apache.hadoop.mapred.TaskTracker: Tasktracker disallowed by JobTracker

solution found in google :

I added the following to the "MapReduce Service Configuration Safety
Valve" in the configuration of the MapReduce service page.

 
    mapred.hosts
    /root/mapred_approved_

hosts
    true
 

Then created /root/mapred_approved_hosts containing:
localhost
localhost.localdomain

In  Cloudera Manager click Services->MapReduce in category search type: "MapReduce Service Configuration Safety Valve" edit value and save, after it restart all services

p.s. so MapReduse run but i have problem to start Beeswax Server :)

Beeswax Server problem fixed, port 8002 used by other program

[me@localhost]# nmap -sT -O localhost
8002/tcp  open  teradataordbms

so I changed  port of Beeswax to 8004 and restarted service