# Error: connect to mongodb: get config server connection URI: mongo: no documents in result **URL:** \ **Category:** Percona Backup for MongoDB\ **Created:** [January 12, 2024, 3:49am UTC](https://forums.percona.com/t/error-connect-to-mongodb-get-config-server-connection-uri-mongo-no-documents-in-result/27733 "2024-01-12T03:49:37Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Vitaly\_Kargin](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/vitaly_kargin/32/14608_2.png) [@Vitaly\_Kargin](https://forums.percona.com/u/Vitaly_Kargin)\ **Post date:** [January 12, 2024, 3:49am UTC](https://forums.percona.com/t/error-connect-to-mongodb-get-config-server-connection-uri-mongo-no-documents-in-result/27733/1 "2024-01-12T03:49:37Z")
## Description: Hello, i’m using PBM fo Mongodb community 7.0 Sharded Cluster 3 mongos 3 config servers - replicaset 3 shard, each is replicaset (rs01 rs02 rs03) I installed Percona Backup For MongoDB 2.3.1 on: - mongo cfg servers - mongo shard servers ```auto cat /etc/percona/pbm_config.yml pitr: enabled: true oplogOnly: false oplogSpanMin: 10 compression: s2 compressionLevel: 2 storage: type: s3 s3: region: eu bucket: superset-mongo-shard prefix: percona-backups endpointUrl: ****** credentials: access-key-id: **** secret-access-key: **** ``` ## Problem: pbm agent starts only on config servers. but on shards systemd log - ‘Failed to start Percona Backup Agent For MongoDB.’ If I run pbm status, I get error “Error: connect to mongodb: get config server connection URI: mongo: no documents in result” ## What should I do? P.S. The same config works on other MongoDB Replicaset (NON-Sharded) ---
**Author:** ![Mukesh\_Kumar](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/mukesh_kumar/32/10698_2.png) [@Mukesh\_Kumar](https://forums.percona.com/u/Mukesh_Kumar)\ **Post date:** [January 12, 2024, 10:00am UTC](https://forums.percona.com/t/error-connect-to-mongodb-get-config-server-connection-uri-mongo-no-documents-in-result/27733/2 "2024-01-12T10:00:25Z")
Hi @Vitaly_Kargin I hope you’re following the [doc](https://docs.percona.com/percona-backup-mongodb/install/initial-setup.html) to setup the pbm in the sharded cluster. Also make sure to set the correct pbm-uri and pbm-agent for config and shards. Sharing an example of PBM\_URI and pbm-agent along with it path. Config server pbm uri: `export PBM_MONGODB_URI="mongodb://pbm_user:pbm_cred@config-server-hostname:port/?authSource=admin&replSetName=cfg_replSetName"` Shard server pbm uri: `export PBM_MONGODB_URI="mongodb://pbm_user:pbm_cred@shard-server-hostname:port/?authSource=admin&replSetName=shard_replSetName"` pbm-agent on shards: `sudo cat /etc/sysconfig/pbm-agent` (for redhat and derivatives) or `/etc/default/pbm-agent` (for debian/Ubuntu ) `PBM_MONGODB_URI="mongodb://pbm_user:pbm_cred@config-server-hostname:port/?authSource=admin"` pbm-agent for config: `PBM_MONGODB_URI=mongodb://pbm_user:pbm_cred@shard-server-hostname:port/?authSource=admin` Please adjust your user/cred/replSetName, shard/config\_host:port accordingly. Apart from this please share the logs of pbm-agent from below, if still you caught an error while configuring the pbm for sharded cluster: ```auto journalctl -u pbm-agent.service ``` Thanks, Mukesh ---
**Author:** ![Vitaly\_Kargin](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/vitaly_kargin/32/14608_2.png) [@Vitaly\_Kargin](https://forums.percona.com/u/Vitaly_Kargin)\ **Post date:** [January 12, 2024, 11:29am UTC](https://forums.percona.com/t/error-connect-to-mongodb-get-config-server-connection-uri-mongo-no-documents-in-result/27733/3 "2024-01-12T11:29:56Z")
I dont understand. You wrote: > pbm-agent on shards: > `sudo cat /etc/sysconfig/pbm-agent` (for redhat and derivatives) or `/etc/default/pbm-agent` (for debian/Ubuntu ) > `PBM_MONGODB_URI="mongodb://pbm_user:pbm_cred@config-server-hostname:port/?authSource=admin"` > > pbm-agent for config: > `PBM_MONGODB_URI=mongodb://pbm_user:pbm_cred@shard-server-hostname:port/?authSource=admin` But how can I indicate `shard-server-hostname` in pbm-agent for config??? I have 10 shards (10 replicaset shards). Which shard should specify in mongo-config server? And why should i specify `config-server-hostname` on `pbm-agent on shards`? Look: my hosts: mongocfg-1 (replSetName: cfg) mongocfg-2 (replSetName: cfg) mongocfg-3 (replSetName: cfg) mongoshard-1-1 (replSetName: rs01) mongoshard-1-2 (replSetName: rs01) mongoshard-1-3 (replSetName: rs01) mongoshard-2-1 (replSetName: rs02) mongoshard-2-2 (replSetName: rs02) mongoshard-2-3 (replSetName: rs02) root@mongocfg-1:~# cat /etc/percona/pbm-agent-env PBM\_MONGODB\_URI=“mongodb://perconaBackup:perconaBackup@127.0.0.1:27017/?authSource=admin” root@mongoshard-1-1:~# cat /etc/percona/pbm-agent-env PBM\_MONGODB\_URI=“mongodb://perconaBackup:perconaBackup@127.0.0.1:27017/?authSource=admin” and other the same uri p.s. It still doesn’t work ---
**Author:** ![Vitaly\_Kargin](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/vitaly_kargin/32/14608_2.png) [@Vitaly\_Kargin](https://forums.percona.com/u/Vitaly_Kargin)\ **Post date:** [January 12, 2024, 11:42am UTC](https://forums.percona.com/t/error-connect-to-mongodb-get-config-server-connection-uri-mongo-no-documents-in-result/27733/4 "2024-01-12T11:42:02Z")
And I have to say, that I find in [docu](https://docs.percona.com/percona-backup-mongodb/install/initial-setup.html) nothing about connection string for sharded cluster ---
**Author:** ![Mukesh\_Kumar](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/mukesh_kumar/32/10698_2.png) [@Mukesh\_Kumar](https://forums.percona.com/u/Mukesh_Kumar)\ **Post date:** [January 12, 2024, 11:49am UTC](https://forums.percona.com/t/error-connect-to-mongodb-get-config-server-connection-uri-mongo-no-documents-in-result/27733/5 "2024-01-12T11:49:13Z")
Hi @Vitaly_Kargin Yes, correct PBM\_MONGODB\_URI in pbm-agent for config/shard should be like below: ```auto pbm-agent on config: sudo cat /etc/sysconfig/pbm-agent (for redhat and derivatives) or /etc/default/pbm-agent (for debian/Ubuntu ) PBM_MONGODB_URI="mongodb://pbm_user:pbm_cred@config-server-hostname:port/?authSource=admin" pbm-agent for shard: PBM_MONGODB_URI=mongodb://pbm_user:pbm_cred@shard-server-hostname:port/?authSource=admin ``` PBM\_MONGODB\_URI of pbm-agent for both shards and configs looks fine. Please share the pbm-agent logs so that we can troubleshoot it further. Thanks, Mukesh ---
**Author:** ![Vitaly\_Kargin](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/vitaly_kargin/32/14608_2.png) [@Vitaly\_Kargin](https://forums.percona.com/u/Vitaly_Kargin)\ **Post date:** [January 12, 2024, 1:48pm UTC](https://forums.percona.com/t/error-connect-to-mongodb-get-config-server-connection-uri-mongo-no-documents-in-result/27733/6 "2024-01-12T13:48:06Z")
> [@Mukesh\_Kumar](#): > > Please share the pbm-agent logs so that we can troubleshoot it further. All logs from root@mongoshard-1-1:~# ```auto cat /var/log/pbm-agent.log Error: connect to mongodb: get config server connection URI: mongo: no documents in result Error: connect to mongodb: get config server connection URI: mongo: no documents in result Error: connect to mongodb: get config server connection URI: mongo: no documents in result Error: connect to mongodb: get config server connection URI: mongo: no documents in result Error: connect to mongodb: get config server connection URI: mongo: no documents in result Error: connect to mongodb: get config server connection URI: mongo: no documents in result ``` ```auto journalctl -u pbm-agent.service -- Journal begins at Sun 2023-12-24 23:22:05 UTC, ends at Fri 2024-01-12 13:45:12 UTC. -- Jan 08 21:42:17 mongoshard-1-1 systemd[1]: Starting Percona Backup Agent For MongoDB... Jan 08 21:42:17 mongoshard-1-1 systemd[440246]: pbm-agent.service: Failed to determine user credentials: No such process Jan 08 21:42:17 mongoshard-1-1 systemd[440246]: pbm-agent.service: Failed at step USER spawning /usr/bin/pbm: No such process Jan 08 21:42:17 mongoshard-1-1 systemd[1]: pbm-agent.service: Control process exited, code=exited, status=217/USER Jan 08 21:42:17 mongoshard-1-1 systemd[1]: pbm-agent.service: Failed with result 'exit-code'. Jan 08 21:42:17 mongoshard-1-1 systemd[1]: Failed to start Percona Backup Agent For MongoDB. Jan 08 21:42:22 mongoshard-1-1 systemd[1]: pbm-agent.service: Scheduled restart job, restart counter is at 1. Jan 08 21:42:22 mongoshard-1-1 systemd[1]: Stopped Percona Backup Agent For MongoDB. Jan 08 21:42:22 mongoshard-1-1 systemd[1]: Starting Percona Backup Agent For MongoDB... Jan 08 21:42:22 mongoshard-1-1 systemd[440302]: pbm-agent.service: Failed to determine user credentials: No such process Jan 08 21:42:22 mongoshard-1-1 systemd[440302]: pbm-agent.service: Failed at step USER spawning /usr/bin/pbm: No such process Jan 08 21:42:22 mongoshard-1-1 systemd[1]: pbm-agent.service: Control process exited, code=exited, status=217/USER Jan 08 21:42:22 mongoshard-1-1 systemd[1]: pbm-agent.service: Failed with result 'exit-code'. Jan 08 21:42:22 mongoshard-1-1 systemd[1]: Failed to start Percona Backup Agent For MongoDB. Jan 08 21:42:27 mongoshard-1-1 systemd[1]: pbm-agent.service: Scheduled restart job, restart counter is at 2. Jan 08 21:42:27 mongoshard-1-1 systemd[1]: Stopped Percona Backup Agent For MongoDB. Jan 08 21:42:27 mongoshard-1-1 systemd[1]: Starting Percona Backup Agent For MongoDB... Jan 08 21:42:27 mongoshard-1-1 systemd[440303]: pbm-agent.service: Failed to determine user credentials: No such process Jan 08 21:42:27 mongoshard-1-1 systemd[440303]: pbm-agent.service: Failed at step USER spawning /usr/bin/pbm: No such process Jan 08 21:42:27 mongoshard-1-1 systemd[1]: pbm-agent.service: Control process exited, code=exited, status=217/USER Jan 08 21:42:27 mongoshard-1-1 systemd[1]: pbm-agent.service: Failed with result 'exit-code'. Jan 08 21:42:27 mongoshard-1-1 systemd[1]: Failed to start Percona Backup Agent For MongoDB. Jan 08 21:42:33 mongoshard-1-1 systemd[1]: pbm-agent.service: Scheduled restart job, restart counter is at 3. Jan 08 21:42:33 mongoshard-1-1 systemd[1]: Stopped Percona Backup Agent For MongoDB. Jan 08 21:42:33 mongoshard-1-1 systemd[1]: Starting Percona Backup Agent For MongoDB... ``` ```auto systemctl cat pbm-agent.service # /lib/systemd/system/pbm-agent.service [Unit] Description=Percona Backup Agent For MongoDB Documentation=https://docs.percona.com/ After=network.target [Service] RestartSec=5s Restart=on-failure EnvironmentFile=-/etc/percona/pbm-agent-env Type=simple User=mongodb Group=mongodb PermissionsStartOnly=true ExecStartPre=/usr/bin/pbm config --file /etc/percona/pbm_config.yml ExecStart=/usr/bin/pbm-agent StandardOutput=append:/var/log/pbm-agent.log StandardError=append:/var/log/pbm-agent.log [Install] WantedBy=multi-user.target ``` ```auto cat /etc/percona/pbm_config.yml pitr: enabled: true oplogOnly: false oplogSpanMin: 10 compression: s2 compressionLevel: 2 storage: type: s3 s3: region: eu bucket: superset-mongo-shard prefix: percona-backups endpointUrl: ***** credentials: access-key-id: ***** secret-access-key: ***** ``` ```auto cat /etc/percona/pbm-agent-env PBM_MONGODB_URI="mongodb://perconaBackup:perconaBackup@127.0.0.1:27017/?authSource=admin" ``` ```auto pbm version Version: 2.3.1 Platform: linux/amd64 GitCommit: 8c4265cfb2d9a7581b782a829246d8fcb6c7d655 GitBranch: release-2.3.1 BuildTime: 2023-11-29_13:34_UTC GoVersion: go1.19 ``` ```auto pbm logs Error: connect to mongodb: get config server connection URI: mongo: no documents in result ``` ---
**Author:** ![Vitaly\_Kargin](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/vitaly_kargin/32/14608_2.png) [@Vitaly\_Kargin](https://forums.percona.com/u/Vitaly_Kargin)\ **Post date:** [January 13, 2024, 4:59am UTC](https://forums.percona.com/t/error-connect-to-mongodb-get-config-server-connection-uri-mongo-no-documents-in-result/27733/7 "2024-01-13T04:59:28Z")
I solved the problem It was network problem between shard and cfg. Thank you for participating. ---
**Author:** ![Mukesh\_Kumar](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/mukesh_kumar/32/10698_2.png) [@Mukesh\_Kumar](https://forums.percona.com/u/Mukesh_Kumar)\ **Post date:** [January 16, 2024, 12:53pm UTC](https://forums.percona.com/t/error-connect-to-mongodb-get-config-server-connection-uri-mongo-no-documents-in-result/27733/8 "2024-01-16T12:53:21Z")
Glad to know. thanks.