# How to stop duplicate entries to output file created by output file plugin logstash?

**URL:** <https://discuss.elastic.co/t/how-to-stop-duplicate-entries-to-output-file-created-by-output-file-plugin-logstash/173470>\
**Category:** Logstash\
**Created:** [March 22, 2019, 9:58am UTC](https://discuss.elastic.co/t/how-to-stop-duplicate-entries-to-output-file-created-by-output-file-plugin-logstash/173470 "2019-03-22T09:58:04Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![satyaban](https://avatars.discourse-cdn.com/v4/letter/s/bc8723/32.png) [@satyaban](https://discuss.elastic.co/u/satyaban)\
**Post date:** [March 22, 2019, 9:58am UTC](https://discuss.elastic.co/t/how-to-stop-duplicate-entries-to-output-file-created-by-output-file-plugin-logstash/173470/1 "2019-03-22T09:58:05Z")

</div>

Dear All,

I have log file having content

```
[29-Dec-2017 20:30:06] - ||CompanyID = 65
[30-Dec-2017 20:30:06] - ||CompanyID = 61

```

I am using output file plugin for storing logs to an output file as below

```
    output {

  file {

codec => line { format => "%{message}"}

path => "/Users/Satyaban/Development/ELKLogAnalysis/failedlog/failedoutput.log"

}

}

```

It stored above 2 lines of logs to failedoutput.log file but entries being duplicated continuously .

After sometime failedoutput.log file contained multiple lines above two lines of logs .

Kindly help how to prevent duplicate entries of logs in output file .

Current output log file ( failedoutput.log) contents are

```
    [29-Dec-2017 20:30:06] - ||CompanyID = 65 # First Duplicate entries
     [30-Dec-2017 20:30:06] - ||CompanyID = 61
    [29-Dec-2017 20:30:06] - ||CompanyID = 65 
     [30-Dec-2017 20:30:06] - ||CompanyID = 61 # Second Duplicate entries
    [29-Dec-2017 20:30:06] - ||CompanyID = 65 
     [30-Dec-2017 20:30:06] - ||CompanyID = 61 # Third Duplicate entries
    [29-Dec-2017 20:30:06] - ||CompanyID = 65
     [30-Dec-2017 20:30:06] - ||CompanyID = 61 # Fourth Duplicate entries
    [29-Dec-2017 20:30:06] - ||CompanyID = 65
    .......... ........................ so on 
 [30-Dec-2017 20:30:06] - ||CompanyID = 61
```

---

<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [March 22, 2019, 1:02pm UTC](https://discuss.elastic.co/t/how-to-stop-duplicate-entries-to-output-file-created-by-output-file-plugin-logstash/173470/2 "2019-03-22T13:02:46Z")

</div>

What input do you have configured?

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [April 19, 2019, 1:02pm UTC](https://discuss.elastic.co/t/how-to-stop-duplicate-entries-to-output-file-created-by-output-file-plugin-logstash/173470/3 "2019-04-19T13:02:50Z")

</div>

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