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Issue:

Sometimes ambari might throw the above alert which puts you in some confusion how all 50 DN's can be active and stale.

Firstly, I suggest you to go through this article from HCC and understand how to identify stale datanodes

Resolution:

Increase the value of the property from 30000(default) to 60000 milli seconds or 180000 milli seconds

dfs.namenode.stale.datanode.interval=60000 or 180000
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Revision #:
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Last update:
‎07-14-2017 10:51 PM
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