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HDFS Balancer "Rebalance" action disabled in CM web UI; corrupted state / inconsistent messaging

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HDFS Balancer "Rebalance" action disabled in CM web UI; corrupted state / inconsistent messaging

New Contributor

I ran the HDFS Balancer last night and it crashed after 3 hours with a "ConnectionRefused" from the NN.

 

I'm trying to run it again but the "Rebalance" action is disabled in the CM web UI, and I'm getting inconsistent messages trying to "start"/"stop" the role; each action fails saying "the role is already started" or "the role is already stopped", respectively.

 

"Decommision"/"Recommision" say something like "only datanode roles can be commissioned", and entering/leaving maintenance mode doesn't do anything.

 

What can I do?

 

The HDFS Balancer role has always seemed hard to monitor via the Cloudera Manager Web UI; even when it's been running, it doesn't show as "running" or green-lit in the UI, but now it seems like I'm in a more inconsistent state.

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