while trying to access the master node from any client node there is no response , ssh is not working .
We had maybe the same problem, with all ssh connecting requests getting disconnected, the result was nobody could log in. It turned out there was a bug in sshd's privilege separation code. If you are running LDAP and the privilege separation option as defined in the sshd config is set to "yes", you might want to do a ps to see how many sshd orphans (with PPID of 1) there are when it happens. (I hope you have some way, like a console line, to access the machine when normal users are locked out.)
The workaround could be (1) turn off the privilege separation (set UsePrivilegeSeparation to "no"), or (2) increase the MaxStartups to some big number. Both are sshd configuration options.
-- Wendy Lin --------- IT Research Computing Services Purdue University [EMAIL PROTECTED] http://www-rcd.cc.purdue.edu/~af5/
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