Please find a part of krb5.cnf
dns_lookup_realm = false dns_lookup_kdc = false ticket_lifetime = 24h renew_lifetime = 7d forwardable = true
what is it the files under snn ?
In my case
reinstalled hdfs in CDH.
in SNN machine /hadoop/dfs/snn/current/fsimage_* is different NN /hadoop/dfs/nn/current/fsimage_*
Delete /hadoop/dfs/snn in SNN machine and then restart the SNN.
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