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MapReduce >> mail # user >> Nodeid is null during nodemanager starting up


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Nodeid is null during nodemanager starting up
Hi
   A info log gets my notation.
---------------------------------------------------------------------------------------------------------------------
2013-11-19 11:05:16,222 INFO
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl:
Initialized nodemanager for null: physical-memory=8192 virtual-memory=17204
virtual-cores=8
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  The red color null is supposed to be the nodeId according to the src code
in NodeStatusUpdaterImpl.java
  NodeManager is the last service to start, so NodeId is available. However
it get null.Is it normal.
  Is the Nodeid distributed automaticly or setup artificially.
  And futher more ,I also want to figure out what is purpose of the
nodeid.Or any referenced doc can be available?
Regards
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