Hadoop: How can I start tasktracker? -

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i want open web/ui of tasktracker. localhost:50030/jobtracker.jsp doesn't work since there's no running tasktracker. hadoop applications have been working without tasktracker. found tasktracker should running in order open web/ui. don't know how start tasktracker. how can start tasktracker? tried lots of things don't work.

my status & environment: localhost:50070 web/ui working well. jps command shows datanode, namenode, nodemanager, secondarynamenode, resourcemanager. hadoop version 2.2.0. os red hat 6.3(santiago).

thank in advance.

if using hadoop 2.2.0 has yarn framework, there no jobtracker in it. functionality split , replaced resourcemanager , applicationmaster. here expected jps prinout while running yarn

$jps 18509 jps 17107 namenode 17170 datanode 17252 resourcemanager 17309 nodemanager 17626 jobhistoryserver

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