I am running jenkins inside a container (using the official jenkins image). I have done a volume mapping of -v /var/run/docker.sock:/var/run/docker.sock so that I can run docker commands within the container, using the host's docker daemon.

For setting up the Docker Build step plugin under "Configure System" -> "Docker Builder", when I enter "Docker URL" as "unix:///var/run/docker.sock", I get the below error :

javax.servlet.ServletException: java.lang.NoSuchMethodError: org.apache.http.impl.client.HttpClientBuilder.setConnectionManagerShared(Z)Lorg/apache/http/impl/client/HttpClientBuilder;
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:796)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
at org.kohsuke.stapler.MetaClass$5.doDispatch(MetaClass.java:233)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)

So I tried to expose a tcp socket for the docker daemon on the host. I was able to expose "tcp://13.65.82.196:2375" and I made sure that this port was accessible through firewall. I am able to run docker commands against this URL from within the container. I tested that out with the command "curl -X GET http://13.65.82.196:2375/info" and it works. Next, when I enter "tcp://13.65.82.196:2375" as the Docker URL, I get the same error as before.

Please note that I "Apply" the setting before I hit "Test Connection".
Can someone please help with this?