common: ping existing admin socket before unlink (dumpling) #1407
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When a daemon initializes it tries to create an admin socket and unlinks any pre-existing file, regardless. If such a file is in use, it causes the existing daemon to loose its admin socket. The AdminSocketClient::ping is implemented to probe an existing socket, using the "0" message. The AdminSocket::bind_and_listen function is modified to call ping() on when it finds existing file. It unlinks the file only if the ping fails. http://tracker.ceph.com/issues/7188 fixes: #7188 Backport: emperor, dumpling Reviewed-by: Sage Weil <sage@inktank.com> Signed-off-by: Loic Dachary <loic@dachary.org> (cherry picked from commit 4560078)
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common: ping existing admin socket before unlink (dumpling) Reviewed-by: Sage Weil <sage@inktank.com>
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When a daemon initializes it tries to create an admin socket and unlinks
any pre-existing file, regardless. If such a file is in use, it causes
the existing daemon to loose its admin socket.
The AdminSocketClient::ping is implemented to probe an existing socket,
using the "0" message. The AdminSocket::bind_and_listen function is
modified to call ping() on when it finds existing file. It unlinks the
file only if the ping fails.
http://tracker.ceph.com/issues/7188 fixes: #7188
Backport: emperor, dumpling
Reviewed-by: Sage Weil sage@inktank.com
Signed-off-by: Loic Dachary loic@dachary.org
(cherry picked from commit 4560078)