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data node long start

avatar
Contributor

Hi.

I have cluster with 12 nodes(9 of them with datanodes). 

On each host about 30tb capacity, used on datanodes ~15TB (20Vcores on each and 280gb ram).

After restart one of VM with DN, datanode was started about 1.5 hours.

Is it normal? Or how can i decrease this time.

1 REPLY 1

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Master Mentor

@Yuriy_but 

Absolutely that's not normal. There are a couple of thinks to check the

  • Bad disk or corruption.
  • Force checkpoint and restart the DN to see the behavior.
  • Ensure the NN has enough memory allocated.
  • Remove it from the cluster and rejoin afresh after reformating.
  • Check the NIC and connectivity.
  • Run the balancer to equally distribute the date.