# Appeared \_grokparsefailure, unable to parse specific lines from log file **URL:** \ **Category:** Logstash\ **Created:** [December 14, 2020, 10:50am UTC](https://discuss.elastic.co/t/appeared-grokparsefailure-unable-to-parse-specific-lines-from-log-file/258566 "2020-12-14T10:50:57Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Polak](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/polak/32/80807_2.png) [@Polak](https://discuss.elastic.co/u/Polak)\ **Post date:** [December 14, 2020, 10:50am UTC](https://discuss.elastic.co/t/appeared-grokparsefailure-unable-to-parse-specific-lines-from-log-file/258566/1 "2020-12-14T10:50:57Z")
I have this kind of log: [https://pastebin.com/ztXijyNV](https://pastebin.com/ztXijyNV) I would like to drop all events except the lines with "INFO -- :". Logs are gathered by filebeat and then they are send to logstash. Important data are in log inside fields -\> deviceId, productId, lang\_from, lang\_to, text. I tried different combination in filebeat: [https://pastebin.com/im20uYWU](https://pastebin.com/im20uYWU). Here are config files and patterns: [https://pastebin.com/5sSW8n3Z](https://pastebin.com/5sSW8n3Z) Currently in Kibana I don't get what I want to have and moreover I got in tags (first one is always but second one appeared): "beats\_input\_codec\_plain\_applied, \_grokparsefailure" Honestly I stucked. PS How to drop many events if ` - drop_event: when: regexp: message: "^D,"` allow only one type of "message"? ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [January 11, 2021, 10:51am UTC](https://discuss.elastic.co/t/appeared-grokparsefailure-unable-to-parse-specific-lines-from-log-file/258566/2 "2021-01-11T10:51:11Z")
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