# Syslog error datanode (Uncaught exception in Periodical)

**URL:** <https://community.graylog.org/t/syslog-error-datanode-uncaught-exception-in-periodical/35921>\
**Category:** Graylog Central (peer support)\
**Tags:** dashboards, data-node\
**Created:** [July 1, 2025, 3:59am UTC](https://community.graylog.org/t/syslog-error-datanode-uncaught-exception-in-periodical/35921 "2025-07-01T03:59:48Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![cevinov](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/cevinov/32/18084_2.png) [@cevinov](https://community.graylog.org/u/cevinov)\
**Post date:** [July 1, 2025, 3:59am UTC](https://community.graylog.org/t/syslog-error-datanode-uncaught-exception-in-periodical/35921/1 "2025-07-01T03:59:49Z")

</div>

Before you post: Your responses to these questions will help the community help you. Please complete this template if you’re asking a support question.  
**Don’t forget to select tags to help index your topic!**

**1. Describe your incident:**  
Hello everyone,  
Currently I want to send my syslog to graylog server (6.3), using this documentation.

> **[Set Up an Input](https://go2docs.graylog.org/current/getting_in_log_data/setup_an_input.htm)**
>
> Learn how to set up and configure inputs in Graylog to collect log data from various sources. This guide covers launching inputs, setting up Illuminate packs, configuring data routing, and validating input health with diagnostic tools.

But it does not show any received syslog messages, I check from datanode log container I get this error:  
[https://paste.vino0333.my.id/upload/eel-bison-wasp](https://paste.vino0333.my.id/upload/eel-bison-wasp)

**2. Describe your environment:**

- OS Information: Ubuntu 24.04.2 LTS

- Package Version:  
vino@vino-workspace:~/graylog$ docker version  
Client:  
Version: 28.1.1+1  
API version: 1.48  
Go version: go1.23.8  
Git commit: 068a01e  
Built: Fri Jun 13 16:11:30 2025  
OS/Arch: linux/amd64  
Context: default

Server:  
Engine:  
Version: 28.1.1+1  
API version: 1.49 (minimum version 1.24)  
Go version: go1.23.8  
Git commit: 01f442b  
Built: Fri Jun 13 16:12:14 2025  
OS/Arch: linux/amd64  
Experimental: false  
containerd:  
Version: v1.7.27  
GitCommit: 05044ec0a9a75232cad458027ca83437aae3f4da  
runc:  
Version: 1.2.6  
GitCommit:  
docker-init:  
Version: 0.19.0  
GitCommit: de40ad0

- Service logs, configurations, and environment variables:  
Using template YAML file from official graylog github repo.

**3. What steps have you already taken to try and solve the problem?**  
I already tried to recalculate index ranges, also rotate active write index, but still got the error.  
“root\_cause”:[{“type”:“index\_not\_found\_exception”,“reason”:“no such index [gl-datanode-metrics]”,"

**4. How can the community help?**  
Please give me some advice on how to solve this problem.

---

<div class="post-metadata">

**Author:** ![matthias\_gl](https://avatars.discourse-cdn.com/v4/letter/m/ce7236/32.png) [@matthias\_gl](https://community.graylog.org/u/matthias_gl)\
**Post date:** [July 1, 2025, 10:07am UTC](https://community.graylog.org/t/syslog-error-datanode-uncaught-exception-in-periodical/35921/2 "2025-07-01T10:07:26Z")

</div>

Hi @cevinov ,  
I am not sure if the error we are seeing is related.  
Can you check if you can ingest any messages into data node by setting up a Random Http Input?

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/graylog/original/3X/c/7/c7c09c6b5099570133d6502b83f50ba4430de5b6.png) [@system](https://community.graylog.org/u/system)\
**Post date:** [July 15, 2025, 10:07am UTC](https://community.graylog.org/t/syslog-error-datanode-uncaught-exception-in-periodical/35921/3 "2025-07-15T10:07:36Z")

</div>

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.