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Hadoop >> mail # user >> Mapred.system.dir: should JT start without it?


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Mapred.system.dir: should JT start without it?
Is there a startup for contract mapreduce making its own mapred.system.dir  ?

Also, it seems that the jobtracker can startup even if this directory was not created / doesn't exist - I'm thinking that if that's the case, JT should fail up front.
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB