# Logstash Deprecation log JSON Format
**URL:** https://discuss.elastic.co/t/logstash-deprecation-log-json-format/303155
**Category:** Logstash
**Created:** [April 25, 2022, 11:36am UTC](https://discuss.elastic.co/t/logstash-deprecation-log-json-format/303155 "2022-04-25T11:36:07Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@hunsw](https://discuss.elastic.co/u/hunsw)
#### Post date: [April 25, 2022, 11:36am UTC](https://discuss.elastic.co/t/logstash-deprecation-log-json-format/303155/1 "2022-04-25T11:36:07Z")
Is it possible to configure the deprecation logs of Logstash as JSON entries?
`log.format: json`
works fine for the 'normal' logs, but not for deprecation ones. I've checked log4j2.properties and it seems that some kind of log4j magic could work(?)
I could not so far produce such a config, anyone else had or have a better idea?
---
### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [April 25, 2022, 6:19pm UTC](https://discuss.elastic.co/t/logstash-deprecation-log-json-format/303155/2 "2022-04-25T18:19:22Z")
Yes, you can configure this in log4j2.properties. Look at the first two appenders that are defined
```
appender.console.type = Console
appender.console.name = plain_console
appender.console.layout.type = PatternLayout
appender.console.layout.pattern = [%d{ISO8601}][%-5p][%-25c]%notEmpty{[%X{pipeline.id}]}%notEmpty{[%X{plugin.id}]} %m%n
appender.json_console.type = Console
appender.json_console.name = json_console
appender.json_console.layout.type = JSONLayout
appender.json_console.layout.compact = true
appender.json_console.layout.eventEol = true
```
There two appenders are call plain\_console and json\_console. One of them is enabled by
```
rootLogger.appenderRef.console.ref = ${sys:ls.log.format}_console
```
which chooses between them using the log.format entry in logstash.yml.
This is not the default for the deprecation logs, which are enabled by
```
logger.deprecation.appenderRef.deprecation_rolling.ref = deprecation_plain_rolling
```
You could add another section to log4j2.properties to define a deprecation\_json\_rolling logger and then modify the appenderRef to use deprecation\_${sys:ls.log.format}\_rolling. (Obviously the rolling part is optional, and if you need it for deprecation logs... 🙂 )
---
### Author:  [@hunsw](https://discuss.elastic.co/u/hunsw)
#### Post date: [April 27, 2022, 4:14pm UTC](https://discuss.elastic.co/t/logstash-deprecation-log-json-format/303155/3 "2022-04-27T16:14:08Z")
Thank you I will try your suggestions, knowing that it is doable is enough to spend a few minutes... hours... .... 🙂 on it!!
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 25, 2022, 4:14pm UTC](https://discuss.elastic.co/t/logstash-deprecation-log-json-format/303155/4 "2022-05-25T16:14:27Z")
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