https://community.cloudera.com/t5/Support-Questions/Zookeeper-Service-showing-quot-bad-health-quot-after/m-p/414149#M254670 <P>I just finished installing a new cluster but failed to start the zookeeper service. Each instance started but had the "bad health" flag. The zookeeper log on node 3 showed this error repeatedly.&nbsp;</P><P>++++<BR />Cannot open channel to 1 at election address node1/61.62.63.1:4181<BR />java.net.ConnectException: Connection refused<BR />++++</P><P>On node 3, the connection to node 1 zookeeper port showed no issue.</P><P>$ nc -zv node1 4181<BR />Ncat: Version 7.92 ( <A href="https://nmap.org/ncat" target="_blank">https://nmap.org/ncat</A> )<BR />Ncat: Connected to 61.62.63.1:4181.<BR />Ncat: 0 bytes sent, 0 bytes received in 0.01 seconds.</P><P>On node1, the zookeeper port is open too<BR />$ ss -tulnp | grep 4181<BR />tcp LISTEN 0 50 61.62.63.1:4181 0.0.0.0:*</P><P>The private cloud base cluster is 7.1.9 sp1.</P><P>Thank you.</P><P>Regards,</P> Mon, 01 Jun 2026 17:15:18 GMT Seaport 2026-06-01T17:15:18Z https://community.cloudera.com/t5/Support-Questions/Zookeeper-Service-showing-quot-bad-health-quot-after/m-p/414149#M254670 <P>I just finished installing a new cluster but failed to start the zookeeper service. Each instance started but had the "bad health" flag. The zookeeper log on node 3 showed this error repeatedly.&nbsp;</P><P>++++<BR />Cannot open channel to 1 at election address node1/61.62.63.1:4181<BR />java.net.ConnectException: Connection refused<BR />++++</P><P>On node 3, the connection to node 1 zookeeper port showed no issue.</P><P>$ nc -zv node1 4181<BR />Ncat: Version 7.92 ( <A href="https://nmap.org/ncat" target="_blank">https://nmap.org/ncat</A> )<BR />Ncat: Connected to 61.62.63.1:4181.<BR />Ncat: 0 bytes sent, 0 bytes received in 0.01 seconds.</P><P>On node1, the zookeeper port is open too<BR />$ ss -tulnp | grep 4181<BR />tcp LISTEN 0 50 61.62.63.1:4181 0.0.0.0:*</P><P>The private cloud base cluster is 7.1.9 sp1.</P><P>Thank you.</P><P>Regards,</P> Mon, 01 Jun 2026 17:15:18 GMT https://community.cloudera.com/t5/Support-Questions/Zookeeper-Service-showing-quot-bad-health-quot-after/m-p/414149#M254670 Seaport 2026-06-01T17:15:18Z https://community.cloudera.com/t5/Support-Questions/Zookeeper-Service-showing-quot-bad-health-quot-after/m-p/414152#M254734 <P><a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/45630">@Seaport</a>&nbsp;Hello team&nbsp;<a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/47030">@pajoshi</a>&nbsp;<a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/80101">@shubham_sharma</a>&nbsp;<BR />Do you have any insights here? Thanks!</P> Mon, 01 Jun 2026 21:54:23 GMT https://community.cloudera.com/t5/Support-Questions/Zookeeper-Service-showing-quot-bad-health-quot-after/m-p/414152#M254734 DianaTorres 2026-06-01T21:54:23Z