Postgresql - Minor version upgrade 9.3.5 to 9.3.6 on Ubuntu I am two servers: A &amp; B. My master database is running on A and the version is 9.3.5. It's replica is running on B and the version is 9.3.6. I am trying to use B as UPSTREAM slave, and trying to start another database (on different port) which would be replica of B.
So the desired setup is like this: 
A:5432(master) -> B:5432(slave-upstream) -> A:5433(slave-downstream)

When I try to start A:5433(slave-downstream), it says:

FATAL:  could not connect to the primary server: FATAL:  no pg_hba.conf entry for replication connection from host "5.6.7.8", user "replicator", SSL on
        FATAL:  no pg_hba.conf entry for replication connection from host "5.6.7.8", user "replicator", SSL off


I've following entries on B:

host    all             all             5.6.7.8/32       md5
host    replication     all             5.6.7.8/32       md5


I am suspecing the problem might be due to the difference of versions? If it's the case, how can I upgrade postgresql on A to 9.3.6?

Or anyother help? 

Thanks
I'm guessing your log on server A is being shared by the two databases (master of A and the slave of B).

It looks like you have set ssl = on in your master's postgresql.conf file and have set ssl = off in your slave(B). You should either set ssl to on on all servers or none.

PostgreSQL doesn't usually have a problem replicating across minor versions