i work with zimbra i have created a grok filter for mailbox.log and a pattern file
i have put the filter file called zimbra_mailbox.conf in /etc/logstash/conf.d/
and i have created a directory called patterns in /etc/logstash/ and puted the pattern file into it
and i made this commande chown logstash:logstash /etc/logstash/patterns/zimbra
but when i open logsatsh-forwader.err to see how the transfer of log is going but i get lost connection connection failure 
could you help me please to know where is my problem