# Logstash won't show output on console
**URL:** https://discuss.elastic.co/t/logstash-wont-show-output-on-console/214941
**Category:** Logstash
**Created:** [January 14, 2020, 7:38am UTC](https://discuss.elastic.co/t/logstash-wont-show-output-on-console/214941 "2020-01-14T07:38:45Z")
**Posts on this page:** 10
**Page:** 1
### Author:  [@Anindita\_Chavan](https://discuss.elastic.co/u/Anindita_Chavan)
#### Post date: [January 14, 2020, 7:38am UTC](https://discuss.elastic.co/t/logstash-wont-show-output-on-console/214941/1 "2020-01-14T07:38:45Z")
This is my logstash configuration file:
\<
input {
file {
path =\> "/home/trimslogs/trims.log"
sincedb\_path =\> "NUL"
ignore\_older =\> 0
}
}
filter {
grok {
match =\> { "message" =\> "([(?%{YEAR}-%{MONTHNUM}-%{MONTHDAY:day} %{TIME:time})])([%{LOGLEVEL:type}])([%{USERNAME:application}])([%{IPV4:ip}])([%{HOSTNAME:hostname}])([%{HOSTNAME:class}])([%{USERNAME:method}])([%{BASE10NUM:linenumber}])([null])([null])([Thread[%{GREEDYDATA:threadname}]])([(?%{YEAR}-%{MONTHNUM}-%{MONTHDAY:day} %{TIME:time})])([(?%{YEAR}-%{MONTHNUM}-%{MONTHDAY:day} %{TIME:time})])([%{GREEDYDATA:threadname1}])([%{GREEDYDATA:error\_message}])()()()()()()()()()()"}
}
}
output {
stdout { codec =\> rubydebug }
}
/\>
When i run logstash, it won't give me output on console and remains stuck on
[INFO] 2020-01-14 02:37:55.184 [Api Webserver] agent - Successfully started Logstash API endpoint {:port=\>9600}
---
### Author:  [@Kishorekolla](https://discuss.elastic.co/u/Kishorekolla)
#### Post date: [January 14, 2020, 8:52am UTC](https://discuss.elastic.co/t/logstash-wont-show-output-on-console/214941/2 "2020-01-14T08:52:53Z")
Since you are using linux, which your path suggests. Try changing` sincedb_path => "/dev/null"`
---
### Author:  [@Anindita\_Chavan](https://discuss.elastic.co/u/Anindita_Chavan)
#### Post date: [January 14, 2020, 9:00am UTC](https://discuss.elastic.co/t/logstash-wont-show-output-on-console/214941/3 "2020-01-14T09:00:09Z")
Hello Kishore,
Thank You for the answer. However, I'm still facing the same issue. When I ran it one time before, it worked. When I tried to run it again, it remained stuck at successfully started logstash API endpoint
---
### Author:  [@Kishorekolla](https://discuss.elastic.co/u/Kishorekolla)
#### Post date: [January 14, 2020, 9:18am UTC](https://discuss.elastic.co/t/logstash-wont-show-output-on-console/214941/4 "2020-01-14T09:18:04Z")
Remove the `ignore_older => 0` and try.
---
### Author:  [@Anindita\_Chavan](https://discuss.elastic.co/u/Anindita_Chavan)
#### Post date: [January 14, 2020, 9:30am UTC](https://discuss.elastic.co/t/logstash-wont-show-output-on-console/214941/5 "2020-01-14T09:30:04Z")
Thank You so much Kishore, it worked.
---
### Author:  [@Kishorekolla](https://discuss.elastic.co/u/Kishorekolla)
#### Post date: [January 14, 2020, 10:49am UTC](https://discuss.elastic.co/t/logstash-wont-show-output-on-console/214941/6 "2020-01-14T10:49:12Z")
Your welcome.
---
### Author:  [@Anindita\_Chavan](https://discuss.elastic.co/u/Anindita_Chavan)
#### Post date: [January 14, 2020, 10:52am UTC](https://discuss.elastic.co/t/logstash-wont-show-output-on-console/214941/7 "2020-01-14T10:52:08Z")
Also, can you also tell me if there is some way to figure out where your grok filter is going wrong?
I ran my filter on the grok debugger here [https://grokdebug.herokuapp.com/](https://grokdebug.herokuapp.com/) which seems to be running fine. However, when I try to run the configuration file, I'm getting grokparsefailure
---
### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [January 14, 2020, 2:48pm UTC](https://discuss.elastic.co/t/logstash-wont-show-output-on-console/214941/8 "2020-01-14T14:48:03Z")
My advice on debugging grok patterns can be found [here](https://discuss.elastic.co/t/help-needed-in-grok/213827/2).
In filebeat setting ignore\_older to zero means to include everything. In logstash, setting ignore\_older to zero means to _exclude_ everything more than zero seconds old, which usually excludes everything.
---
### Author:  [@Anindita\_Chavan](https://discuss.elastic.co/u/Anindita_Chavan)
#### Post date: [January 14, 2020, 5:40pm UTC](https://discuss.elastic.co/t/logstash-wont-show-output-on-console/214941/9 "2020-01-14T17:40:34Z")
Thankyou! The explanation really helped because I’m going to configure filebeat next. I will also checkout the grok debug link. Thanks a ton.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [February 11, 2020, 5:40pm UTC](https://discuss.elastic.co/t/logstash-wont-show-output-on-console/214941/10 "2020-02-11T17:40:36Z")
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