Re: invalid value for parameter "client_encoding": "ISO_8859_8"

Mariel Cherkassky <mariel(dot)cherkassky(at)gmail(dot)com> writes:
> My postgresql env consist of 3 nodes(9.6 version) and 2 pgpool`s that acts
> as a load balancer. I'm using postgresql as a database for the next apps :
> bitbucket,jira and crowd. However, I'm getting alot of errors in the pgpool
> log about the client_encoding for every connection that comes from one of
> those application :

> invalid value for parameter "client_encoding": "ISO_8859_8"
> Cannot change "client_encoding" now.

[ digs around ... ] The "Cannot change" bit seems to indicate that this
error is coming from check_client_encoding(), and it's failing because
it cannot change client_encoding for an existing session outside a
transaction. The comment about it is:

* ... This would only happen if someone tries to change
* client_encoding in postgresql.conf and then SIGHUP existing sessions.
* It seems like a bad idea for client_encoding to change that way anyhow,
* so we don't go out of our way to support it.

I'm not very sure how you'd get into a state where this was affecting
new sessions as well as pre-existing ones, or why it would affect only
some sessions. Maybe the latter could be explained if all but this one
app explicitly set client_encoding for themselves.

Anyway, I think it's impossible for the client app to trigger this
by itself. There must be some server-side source of this value,
if not postgresql.conf then maybe ALTER DATABASE/ROLE SET?

regards, tom lane