default capacity scheduler only one job in running status

[ch huang]

hi,maillist:
            i set the following option in yarn-site.xml ,let yarn framework
to use capacity scheduler,but i submit three job,only one job in running
status,other two stay in accepted status,why ,the default queue only 50%
capacity used,i do not know why?

<property>
    <name>yarn.resourcemanager.scheduler.class</name>

<value>org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler</value>
</property>