For some OOM Killer crash issue, one of the data node was dead for 2 days
before i recovered it.
now the bad health alert for tasktracker and datanodes.
the error message on the screen shows for that node,
Healthy DataNodes: 2. Concerning DataNodes: 0. Total DataNodes: 3. Percent
healthy: 66.67%. Percent healthy or concerning: 66.67%. Critical threshold:
This TaskTracker was not connected to its JobTracker.<http://nn-01-sc.nim.com:7180/cmf/services/30/instances/122/advicePopup?timestamp=1380484732313¤tMode=false&healthTestName=TASK_TRACKER_CONNECTIVITY>
i saw a message also complain this node offline too long.
any way to resolve this?
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