# Upgrade from 1.5 to 2.0: Pattern not defined **URL:** \ **Category:** Logstash\ **Created:** [November 11, 2015, 10:26am UTC](https://discuss.elastic.co/t/upgrade-from-1-5-to-2-0-pattern-not-defined/34312 "2015-11-11T10:26:08Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![LansK](https://avatars.discourse-cdn.com/v4/letter/l/dc4da7/32.png) [@LansK](https://discuss.elastic.co/u/LansK)\ **Post date:** [November 11, 2015, 10:53am UTC](https://discuss.elastic.co/t/upgrade-from-1-5-to-2-0-pattern-not-defined/34312/4 "2015-11-11T10:53:11Z")
The config is fairly large to copy and paste and it isn't giving me a line number. And if I try it with --configtest, it surprisingly passes. I did remove the entire filter {} section and it worked so it is not happy with something there. I added this to the beginning of every grok stanza, to be safe, following an issue I found on github: ``` patterns_dir => "/etc/logstash/patterns" ``` I've already updated to change "host" to "hosts" since I saw that in the incompatible changes. That's not the problem here, but thanks for the suggestion. Might it have anything to do with this? [Grok -\> patterns\_dir not working in logstash 1.5.0](https://discuss.elastic.co/t/grok-patterns-dir-not-working-in-logstash-1-5-0/1428) Do I need to install a plugin to access the patterns included with logstash by default? Edit: confirmed that %{HOST} is a built-in pattern (or at least grok debugger says it is): [https://grokdebug.herokuapp.com/patterns#](https://grokdebug.herokuapp.com/patterns#) (look under grok-patterns) Edit2: I am not confident that it is related but the logstash log is filling up with permission denied errors like this one for local files: ``` {:timestamp=>"2015-11-11T06:28:13.624000-0500", :message=>"failed to open /var/log/syslog: Permission denied - /var/log/syslog", :level=>:warn} ``` --- _[View the full topic](https://discuss.elastic.co/t/upgrade-from-1-5-to-2-0-pattern-not-defined/34312)._