Host monitor fails to start because of j_spring_security_check 403 error

[#1]

Below error can be seen in host monitor log. Is there a way resolve it?

Failed to publish event: SimpleEvent{attributes={ROLE_TYPE=[HOSTMONITOR], EXCEPTION_TYPES=[java.io.IOException], HOST_IDS=[host_id], STACKTRACE=[java.io.IOException: Server returned HTTP response code: 403 for URL: http://cloudera_manager_ip:7180/cmf/j_spring_security_check
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1894)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
at com.cloudera.cmf.BasicScmProxy.authenticate(BasicScmProxy.java:285)
at com.cloudera.cmf.BasicScmProxy.fetch(BasicScmProxy.java:596)
at com.cloudera.cmf.BasicScmProxy.getFragmentAndHash(BasicScmProxy.java:686)
at com.cloudera.cmf.DescriptorAndFragments.newDescriptorAndFragments(DescriptorAndFragments.java:64)
at com.cloudera.cmon.firehose.Main.main(Main.java:392)

[#2]

@rok Perhaps. 

I think the place to begin would be to look at this:

STACKTRACE=[java.io.IOException: Server returned HTTP response code: 403 for URL: http://cloudera_manager_ip:7180/cmf/j_spring_security_check

…and figure out why the access request to that URL is being denied with an HTTP 403 Forbidden client error. Is that URL accessing a host on your network, or the host running Cloudera Manager?