Thursday, February 13, 2014

Patchmgr hungs in the process of patching IB switches

As you know, the January 2014 Quarterly Full Stack Patch (QFSP) for Exadata contain new IB switches version - 2.1.3-4.
In many cases (my experience - 4 switches of 6) the command hungs:
./patchmgr -ibswitches -upgrade

It nothing do and wait something. We waited 1 hour and press Ctrl+C.
 
The SOLUTION is:

When you connect to Unix server the ssh daemon running on this server get your IP and try to resolve your IP into the name.
Such behavior is controlled by parameter UseDNS in /etc/ssh/sshd_config file.
By default the line look like:
#UseDNS=yes

Remove the # and change it to "no" :
UseDNS=no

And run patchmgr again !

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