# Random crashes on 3 node cluster, ubuntu 20.04

**URL:** <https://forums.percona.com/t/random-crashes-on-3-node-cluster-ubuntu-20-04/18055>\
**Category:** Percona XtraDB Cluster 8.x\
**Tags:** mysql, percona\
**Created:** [October 18, 2022, 8:02am UTC](https://forums.percona.com/t/random-crashes-on-3-node-cluster-ubuntu-20-04/18055 "2022-10-18T08:02:59Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![adi](https://avatars.discourse-cdn.com/v4/letter/a/4da419/32.png) [@adi](https://forums.percona.com/u/adi)\
**Post date:** [October 19, 2022, 12:30pm UTC](https://forums.percona.com/t/random-crashes-on-3-node-cluster-ubuntu-20-04/18055/7 "2022-10-19T12:30:22Z")

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Hi @Kamil_Holubicki

My issue still persists and whenever Nesus Scans runs services go down of that node. Just now I tried to upgrade my galera to 4.12 and restarted the Scan, just hoping that it doesn’t go down.

I also tried to give maximum open\_file\_limit and also made max\_connection = 1000, even that didn’t help  
all hope is on the Galera version upgrade (referring to below jira link which mentions nesus scans crashes galera version 26.4.3 and fix is 26.4.12)  
[https://jira.mariadb.org/browse/MDEV-25068](https://jira.mariadb.org/browse/MDEV-25068)

But I think, for some Nessus impact the services and for other’s don’t because of the template used to Scan, in our scenario Nessus also runs some kind of Pen testing as per the CIS benchmark because of which at some point services goes down.

@Simon_Karberg What do you see in your general logs during scanning?

> [@Looks Like Bug, to many connection crashes PXC](https://forums.percona.com/t/looks-like-bug-to-many-connection-crashes-pxc/17920):
>
> Hi All, Firstly thanks for walking me through this journey. This is linked to “[SSL issue with async replication between 2 pxc](https://forums.percona.com/t/ssl-issue-with-async-replication-between-2-pxc/17900)” Context has changed hence creating a new thread. Looks like it’s a bug! as per the error message on line 18, This happens when the security team tries to scan MySQL using root for scanning vulnerabilities, the SSL error occurs and PXC node on which scan is running crashes, log message says it’s a bug and my my.cnf and other outputs shared above look fine. After the…

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