oleg611-server: ssh: connect to host oleg611-server port 22: Connection reset by peer

pdsh@oleg611-client: oleg611-server: ssh exited with exit code 255
oleg611-server: Warning: Permanently added 'oleg611-server' (ECDSA) to the list of known hosts.

MGS_OS_ID_LIKE=rhel centos fedora rocky
MGS_OS_VERSION_ID=8.10
MGS_OS_ID=rocky
MGS_OS_VERSION_CODE=134873088
MDS1_OS_VERSION_ID=8.10
MDS1_OS_VERSION_CODE=134873088
MDS1_OS_ID_LIKE=rhel centos fedora rocky
MDS1_OS_ID=rocky