telnet: Unable to connect to remote host: Connection refused

Question

I am inside docker and I have installed zookeeper and trying to test it using telnet But it is not working

$ telnet localhost 2181
Trying ::1...
Trying 127.0.0.1...
telnet: Unable to connect to remote host: Connection refused

I tried these also

telnet 127.0.0.1 2181
telnet 172.17.0.2 2181

But same error.

netstat status

# netstat -tlpn
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name

Please help.

Sir, it's been six years almost since, but maybe there any solution you've found? — Andrew, Jan 23 '23 at 18:13

score 1 · Answer 1 · answered May 21 '20 at 13:54

check your ubuntu system log with this command

sudo gedit /var/log/syslog

and if you will see this error "execv( /usr/sbin/tcpd ) failed: No such file or directory" then run this command

sudo apt-get install tcpd

it will solve your problem (if not then you need to search your system error on google)

TLin · Answer 2 · 2017-02-03T04:03:17.480

1

Verify zookeeper is actually running, via

ps aux | grep -i zookeeper

If it is, then it may not be bound to 127.0.0.1 or 0.0.0.0. So check which IP address it's actually bound to,

netstat -tlpn

Then try to telnet to it using that address.

edited Feb 03 '17 at 04:03

answered Feb 03 '17 at 03:50

TLin

99
6

Just now I found even `telnet locahost ` is not working. Has same error. – Avinash Feb 03 '17 at 03:53
Simply using `telnet localhost` would attempt to connect to a local server process listening port 23. Most servers/containers I know don't enable telnet servers by default since it's insecure. – TLin Feb 03 '17 at 04:02
Any idea how to fix it. – Avinash Feb 03 '17 at 04:25
Can you update your post with the output of `netstat -tlpn` – TLin Feb 03 '17 at 05:02
I have updated. – Avinash Feb 03 '17 at 05:35
It's clear from your netstat output that there's no server process listening. Are you sure zookeeper is running? I suggest trying out this guide if you haven't already: https://zookeeper.apache.org/doc/r3.3.3/zookeeperStarted.html – TLin Feb 03 '17 at 06:08
Did you check your firewall? – thewebjackal Feb 03 '17 at 11:57

telnet: Unable to connect to remote host: Connection refused

2 Answers2