task track bad health

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:
90.00%.<http://nn-01-sc.nim.com:7180/cmf/services/31/advicePopup?key=nameservice1&timestamp=1380485783769&currentMode=false&healthTestName=HDFS_DATA_NODES_HEALTHY>

for hdfs

This TaskTracker was not connected to its JobTracker.<http://nn-01-sc.nim.com:7180/cmf/services/30/instances/122/advicePopup?timestamp=1380484732313&currentMode=false&healthTestName=TASK_TRACKER_CONNECTIVITY>


for tasktracker

i saw a message also complain this node offline too long.

any way to resolve this?


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