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StorageGRID upgrading error from 11.3.0.12 to 11.4 "Unable to connect to 127.0.0.1 on port 8022: fingerprint"

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Applies to

StorageGRID 11.3.x

Issue

An error message is showed in the file  gdu-server  located under  /var/local/log directory of the admin node


E, [2021-05-17T10:37:29.360102 #20191] ERROR -- gdu-server: Failure occurred during Upgrade Start
E, [2021-05-17T10:37:29.360358 #20191] ERROR -- gdu-server: #<Bycast::Tasks::GduServer::UpgradeStart::LocalizedError: 
key: "upgrade.start_upgrade_failure", options: {:details=>"Error when running upgrade-node.rb. 
/var/local/install/upgrade-stage/swupdate/lib/upgrade/node.rb:132:in `remove_nobarrier_from_fstab!': 
Unable to remove nobarrier from /etc/fstab in base OS: /usr/local/lib/site_ruby/bycast/commands/sh.rb:129:in `rescue in block in call': Unable to connect to 127.0.0.1 on port 8022: fingerprint xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx: is unknown for \"[127.0.0.1]:8022\" (Bycast::Commands::Sh::Remote::Error) 

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