[horde] Sometimes the "error when communicating with the server" message shows up

Jan Schneider jan at horde.org
Thu Jun 11 11:39:44 UTC 2015

Zitat von Andre Luiz Paiz <andre.paiz at iqm.unicamp.br>:

> Hi everybody,
> Some users are complaining that the "error when communicating with  
> the server" in a red window shows up some times.
> The service is working, users can send and receive e-mail, but  
> sometimes this message appears and some users need to logon again.
> Is there any tune up that I can do to fix that?
> I use:
> CentOS 6 on both IMAP and webmail server
> Imapproxyd inside the webmail server to perform fast IMAP auth
> Dovecot on the IMAP server
> The users are using Google Chrome and Internet Explorer.
> The only error from IMP that I receive is: EMERG: HORDE [imp]  
> Invalid token! [pid 26191 on line 540 of  
> "/usr/share/pear/Horde/Session.php". But I don´t know if it is  
> related.

Yes, most probably, since this is going to be a fatal error. For some  
reason the token stored in the user's session either gets lost or is  
invalid. If you enable DEBUG logging you see a backtrace where this is  
coming from. Do you have a load balanced environment?

Jan Schneider
The Horde Project

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