# Error cannot connect to mongodb

**URL:** <https://forums.percona.com/t/error-cannot-connect-to-mongodb/21521>\
**Category:** Percona Backup for MongoDB\
**Tags:** mongodb\
**Created:** [April 20, 2023, 4:20am UTC](https://forums.percona.com/t/error-cannot-connect-to-mongodb/21521 "2023-04-20T04:20:54Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![hieu\_nguyen](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/hieu_nguyen/32/6616_2.png) [@hieu\_nguyen](https://forums.percona.com/u/hieu_nguyen)\
**Post date:** [April 20, 2023, 4:20am UTC](https://forums.percona.com/t/error-cannot-connect-to-mongodb/21521/1 "2023-04-20T04:20:54Z")

</div>

I’m trying to do a backup using Percona Backup for MongoDB everything is working properly

 ![Screenshot_585](https://us1.discourse-cdn.com/flex019/uploads/percona1/original/2X/7/777a178749904b67619af3372b97f7c9988efe65.png)  
after i tried to run the following command and got the error  
 ![Screenshot_584](https://us1.discourse-cdn.com/flex019/uploads/percona1/original/2X/b/b963381e80073136843e550ee8f1aa570c5b50fb.png)  
I am sure that all my information is correct, I have double checked.Here are some of my logs  
 ![Screenshot_587](https://us1.discourse-cdn.com/flex019/uploads/percona1/original/2X/4/4007c39de188460fec081334d54c2252f26a023b.png)  
 ![Screenshot_586](https://us1.discourse-cdn.com/flex019/uploads/percona1/original/2X/9/9ca047a8de6993603470b879315a56fcaa957fd0.png)

---

<div class="post-metadata">

**Author:** ![Ivan\_Groenewold](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/ivan_groenewold/32/6299_2.png) [@Ivan\_Groenewold](https://forums.percona.com/u/Ivan_Groenewold)\
**Post date:** [April 20, 2023, 3:22pm UTC](https://forums.percona.com/t/error-cannot-connect-to-mongodb/21521/2 "2023-04-20T15:22:09Z")

</div>

Hi, it seems from the error that your replica set is not healthy. Have you checked there is a primary?

---

<div class="post-metadata">

**Author:** ![hieu\_nguyen](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/hieu_nguyen/32/6616_2.png) [@hieu\_nguyen](https://forums.percona.com/u/hieu_nguyen)\
**Post date:** [April 21, 2023, 1:34am UTC](https://forums.percona.com/t/error-cannot-connect-to-mongodb/21521/3 "2023-04-21T01:34:44Z")

</div>

i checked and mongo is still working

 ![Screenshot_588](https://us1.discourse-cdn.com/flex019/uploads/percona1/original/2X/e/e8ff68aaaf67e6ff031a511d282afba00cc5794e.png)  
 ![Screenshot_589](https://us1.discourse-cdn.com/flex019/uploads/percona1/original/2X/e/e07714c1ff989f96048a378f48db1c7861a4eedc.png)

---

<div class="post-metadata">

**Author:** ![Ivan\_Groenewold](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/ivan_groenewold/32/6299_2.png) [@Ivan\_Groenewold](https://forums.percona.com/u/Ivan_Groenewold)\
**Post date:** [April 21, 2023, 10:50am UTC](https://forums.percona.com/t/error-cannot-connect-to-mongodb/21521/4 "2023-04-21T10:50:09Z")

</div>

Hi, are you running a replica set? from your output it seems it is a standalone node which is not supported by Percona Backup.