# Dateparse failure

**URL:** <https://discuss.elastic.co/t/dateparse-failure/259001>\
**Category:** Logstash\
**Created:** [December 17, 2020, 1:58pm UTC](https://discuss.elastic.co/t/dateparse-failure/259001 "2020-12-17T13:58:35Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![calanon](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/calanon/32/64004_2.png) [@calanon](https://discuss.elastic.co/u/calanon)\
**Post date:** [December 17, 2020, 1:58pm UTC](https://discuss.elastic.co/t/dateparse-failure/259001/1 "2020-12-17T13:58:35Z")

</div>

I cannot find a way to either debug or fix this. I have provided below the log output and the various grok filters that are used. What can I do to fix this?

**RAW Log output**

```
  `logstash[23980]: [2020-12-17T14:19:12,925][WARN]

```

**Grok filters in Logstash**

```
DATESTAMP_ADMIN_LOG %{YEAR}%{MONTHNUM}%{MONTHDAY} %{HOUR}%{MINUTE}%{SECOND}

\[%{DATESTAMP_ADMIN_LOG:log_timestamp}\] %{PID_B24:pid} %{LOGLEVEL:loglevel} - %{GREEDYDATA:message}

```

**Date module in logstash**

```
  date {
    match => ["log_timestamp", "[yyyyMMdd HHmmss]", "yyyyMMdd HHmmss,SSS", "yyyy-MM-dd'T'HH:mm:ss", "yyyy-MM-dd HH:mm:ss ZZZ" ]
    target => "@timestamp"
    timezone => "Europe/Berlin"
    add_field => { "debug" => "timestampMatched" }
  }

```

**JSON output in Elasticsearch**

```
Dez 17 14:19:15 mon-01 logstash[23980]: "log_timestamp" => "20201217 141912",
Dez 17 14:19:15 mon logstash[23980]: "@version" => "1",
Dez 17 14:19:15 mon logstash[23980]: "tags" => [
Dez 17 14:19:15 mon logstash[23980]: [0] "live0",
Dez 17 14:19:15 mon logstash[23980]: [1] "beats_input_codec_plain_applied",
Dez 17 14:19:15 mon logstash[23980]: [2] "_dateparsefailure"
Dez 17 14:19:15 mon logstash[23980]: ],
```

---

<div class="post-metadata">

**Author:** ![aaron-nimocks](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/aaron-nimocks/32/73965_2.png) [@aaron-nimocks](https://discuss.elastic.co/u/aaron-nimocks)\
**Post date:** [December 17, 2020, 3:10pm UTC](https://discuss.elastic.co/t/dateparse-failure/259001/2 "2020-12-17T15:10:28Z")

</div>

Try to change `"[yyyyMMdd HHmmss]"` to `"yyyyMMdd HHmmss"` in the below.

```auto
    match => ["log_timestamp", "[yyyyMMdd HHmmss]", "yyyyMMdd HHmmss,SSS", "yyyy-MM-dd'T'HH:mm:ss", "yyyy-MM-dd HH:mm:ss ZZZ" ]

```

Your output of `"log_timestamp" => "20201217 141912"` doesn't have brackets around it.

---

<div class="post-metadata">

**Author:** ![calanon](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/calanon/32/64004_2.png) [@calanon](https://discuss.elastic.co/u/calanon)\
**Post date:** [December 18, 2020, 10:09am UTC](https://discuss.elastic.co/t/dateparse-failure/259001/3 "2020-12-18T10:09:16Z")

</div>

@aaron-nimocks That worked and thanks very much.

I have the same problem with this one:

**RAW output**  
`[2020-12-17T16:45:45+01:00]`

**Elasticsearch JSON**

```
Dez 18 11:03:58 mon logstash[23980]: "log_timestamp" => "2020-12-18T11:03:56+01:00",
Dez 18 11:03:58 mon logstash[23980]: "@version" => "1",
Dez 18 11:03:58 mon logstash[23980]: "tags" => [
Dez 18 11:03:58 mon logstash[23980]: [0] "live0",
Dez 18 11:03:58 mon logstash[23980]: [1] "beats_input_codec_plain_applied",
Dez 18 11:03:58 mon logstash[23980]: [2] "_dateparsefailure" 

```

**Grok match**  
`\[%{TIMESTAMP_ISO8601:log_timestamp}\]`

The match is the same as the post above.

---

<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:** [January 15, 2021, 10:09am UTC](https://discuss.elastic.co/t/dateparse-failure/259001/4 "2021-01-15T10:09:18Z")

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