# Logstash grok ignore field if unavailable
**URL:** https://discuss.elastic.co/t/logstash-grok-ignore-field-if-unavailable/229159
**Category:** Logstash
**Created:** [April 22, 2020, 2:13am UTC](https://discuss.elastic.co/t/logstash-grok-ignore-field-if-unavailable/229159 "2020-04-22T02:13:58Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Chandra12](https://discuss.elastic.co/u/Chandra12)
#### Post date: [April 22, 2020, 2:13am UTC](https://discuss.elastic.co/t/logstash-grok-ignore-field-if-unavailable/229159/1 "2020-04-22T02:13:59Z")
Hi,
I'm trying to skip field if any of below field is missing I couldn't to parse
VD=73,IP=10.4.1.1,M1=1586,M2=158,TB=Mobile,
Grok expression for above
VD=%{NUMBER:VD},IP=%{IPV4:ipaddress},M1=%{NUMBER:m1},M2=%{NUMBER:m2},TB=%{DATA:tt},
Lets Say If VD is missing It has to parse by skipping field, I looking for universal pattern that parses even if any field is missing .
Any idea would be helpful thank you
---
### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [April 22, 2020, 3:38pm UTC](https://discuss.elastic.co/t/logstash-grok-ignore-field-if-unavailable/229159/2 "2020-04-22T15:38:37Z")
What would the line look like if a field were missing? You can make a field optional by surrounding it with ()?
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 20, 2020, 3:38pm UTC](https://discuss.elastic.co/t/logstash-grok-ignore-field-if-unavailable/229159/3 "2020-05-20T15:38:42Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.