Hazelcast management center exception

Question

Whenever I try to run the hazelcast management cluster I get the following error org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet [collector] in context with path [/mancenter-3.4.2] threw exception com.hazelcast.com.eclipsesource.json.ParseException: Expected value at 1:0

I am running hazelcast management center on tomcat 8.0. I am able to login without any issues but when I try to add any value to "Update Cluster URL" I get the above error.

Answer 1

I just downloaded 3.4.2 from hazelcast website.

Then i copied mancenter.war to tomcat8/webapps directory.

In hazelcast-3.4.2 folder, there is demo folder and i executed console.sh.

When i put entries to map, i saw these entries also in mancenter. I didn't encounter any problem. My tomcat version 8.0.23

When you try tomcat7, do you see errors?

Answer 2

This might be due to version mismatch between your Hazelcast cluster and management center. What's your hazelcast version?