In some cases, the mongod service has been down and you get this error through the shell or GUI.
General Error:
Error: No suitable servers found (serverSelectionTryOnce set): [connection refused calling ismaster on 'localhost:27217']
2. We also found cases where JetMongo fails to start due to this error which can be caused by having localhost set to ipv6 instead of ipv4 in the /etc/hosts file.
# Do not remove the following line, or various programs
# that require network functionality will fail.
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
Please try setting the localhost to the default ipv4 IP (127.0.0.1)
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
and then restarting the jetbackup5d service:systemctl restart jetbackup5d
3. Verify another cron or process such as lfd is not killing the process. For example, the logs below show that jetmongod is being killed.
[root@qa1 cron.d]# tail -f /var/log/lfd.log
Feb 26 09:28:27 qa1 lfd[451585]: *User Processing* PID:447832 Kill:1 User:mongod VM:1499(MB) EXE:/usr/local/jetapps/usr/bin/mongod CMD:/usr/local/jetapps/usr/bin/mongod --quiet -f /usr/local/jetapps/etc/mongod.conf run
Feb 26 09:29:27 qa1 lfd[456526]: *User Processing* PID:451649 Kill:1 User:mongod VM:1499(MB) EXE:/usr/local/jetapps/usr/bin/mongod CMD:/usr/local/jetapps/usr/bin/mongod --quiet -f /usr/local/jetapps/etc/mongod.conf run
Feb 26 09:30:27 qa1 lfd[462225]: *User Processing* PID:457624 Kill:1 User:mongod VM:1499(MB) EXE:/usr/local/jetapps/usr/bin/mongod CMD:/usr/local/jetapps/usr/bin/mongod --quiet -f /usr/local/jetapps/etc/mongod.conf run
Feb 26 09:31:28 qa1 lfd[466836]: *User Processing* PID:463118 Kill:1 User:mongod VM:1499(MB) EXE:/usr/local/jetapps/usr/bin/mongod CMD:/usr/local/jetapps/usr/bin/mongod --quiet -f /usr/local/jetapps/etc/mongod.conf run
Feb 26 09:32:28 qa1 lfd[471770]: *User Processing* PID:468109 Kill:1 User:mongod VM:1499(MB) EXE:/usr/local/jetapps/usr/bin/mongod CMD:/usr/local/jetapps/usr/bin/mongod --quiet -f /usr/local/jetapps/etc/mongod.conf run
To whitelist in LFD:
- Go to "ConfigServer Security and Firewall"
- Find the "lfd - Login Failure Daemon" section
- In the "Edit lfd ignore file" dropdown menu, find "Process Tracking" or edit the
/etc/csf/csf.pignorefile - Add the following config:
exe:/usr/local/jetapps/usr/bin/jetmongod- Restart CSF with
csf -r
4. It is likewise important to ensure that your server is not blocking localhost traffic over port 27217. You can use the Ncat command to verify that traffic is allowed:
nc -v localhost 27217
Ncat: Connected to 127.0.0.1:27217.
If instead you get the output nc: connect to localhost (127.0.0.1) port 27217 (tcp) failed: Connection refused, you will need to work with your qualified systems administrator to resolve this.
