It sounds like you have rados CLI tool from an earlier Ceph release (< Hammer) 
installed and it is attempting to use the librados shared library from a newer 
(>= Hammer) version of Ceph.

Jason 


----- Original Message ----- 

> From: "Aakanksha Pudipeddi-SSI" <aakanksha...@ssi.samsung.com>
> To: ceph-us...@ceph.com
> Sent: Thursday, August 20, 2015 11:47:26 PM
> Subject: [ceph-users] Rados: Undefined symbol error

> Hello,

> I cloned the master branch of Ceph and after setting up the cluster, when I
> tried to use the rados commands, I got this error:

> rados: symbol lookup error: rados: undefined symbol:
> _ZN5MutexC1ERKSsbbbP11CephContext

> I saw a similar post here: http://tracker.ceph.com/issues/12563 but I am not
> clear on the solution for this problem. I am not performing an upgrade here
> but the error seems to be similar. Could anybody shed more light on the
> issue and how to solve it? Thanks a lot!

> Aakanksha

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