# What is this error?

**URL:** <https://discuss.elastic.co/t/what-is-this-error/337869>\
**Category:** Logstash\
**Created:** [July 7, 2023, 8:34am UTC](https://discuss.elastic.co/t/what-is-this-error/337869 "2023-07-07T08:34:04Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![inbeom\_cho](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/inbeom_cho/32/123115_2.png) [@inbeom\_cho](https://discuss.elastic.co/u/inbeom_cho)\
**Post date:** [July 7, 2023, 8:34am UTC](https://discuss.elastic.co/t/what-is-this-error/337869/1 "2023-07-07T08:34:04Z")

</div>

hi all

my logstash jvm config is  
Xms 2g Xmx 2g  
and  
3 server and each server has 2conf file

conf file is 1workers config  
and  
content is

```auto
input {
  jdbc {oracle}
}
output {
  jdbc { postgresql}
}

```

logstash no problem at first  
but suddenly some server error

ERROR is

```auto
JDBC - Exception. Not retrying {:exception=>#<SystemCallError: Unknown error (SystemCallError) - <STDERR>>

```

i checked

1. conf file ==\> that is no problem
2. get event at oracle, some one wrong event ==\> that is no problem
3. get first event content, direct insert to postgresql ==\> that is no problem
4. restart logstash from first event content ==\> that is no problem

what am i wrong??????

---

<div class="post-metadata">

**Author:** ![eMitch](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/emitch/32/93607_2.png) [@eMitch](https://discuss.elastic.co/u/eMitch)\
**Post date:** [July 7, 2023, 12:29pm UTC](https://discuss.elastic.co/t/what-is-this-error/337869/2 "2023-07-07T12:29:39Z")

</div>

Have you looked into the logs from Oracle or Postgres?  
Can you expand upon the logs from Logstash?

Also, are you monitoring Oracle and Postgres systems while running Logstash?  
If not, I would recommend keeping an eye on their connection and memory metrics at the bare minimum.

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<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:** [August 4, 2023, 12:30pm UTC](https://discuss.elastic.co/t/what-is-this-error/337869/3 "2023-08-04T12:30:25Z")

</div>

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