Install Navigator Metadata Server using Python CM API

[#1]

Hi

I am trying to add roles for Management Service. I could add all the roles, except Navigator Metadata Server. I get "NullPointerException" as my code touches the create_role for Navigator Metadata Server.

cm_api.api_client.ApiException: <ns1:XMLFault xmlns:ns1="http://cxf.apache.org/bindings/xformat"><ns1:faultstring xmlns:ns1="http://cxf.apache.org/bindings/xformat">java.lang.RuntimeException: java.lang.NullPointerException</ns1:faultstring></ns1:XMLFault> (error 500)

My code is as follows:

mgmt = ApiResource(<my_configs_here>).get_cloudera_manager().create_mgmt_service(<my_configs_here>)
mgmt.create_role(navms_role_name + '-1', navms_role_type, cm_host_name)

Any help or pointers would be appreciated.

[#2]

Hi Harman,

Did you install a license? This role requires a license to install. That may be the issue.

You can also turn on API debug logging and/or check the CM server log for more information.

Thanks,
Darren

[#3]

Hey Darren,

I started the CM with a trial license, and I was able to install Navigator Auditor as well, but not just Navigator Metadata Server.

As you suggested, I will try a re-install and check the logs and then come back.

Sorry for a dumb question, but how can I change the logging level for the API ?

Thanks for the pointers.

Cheers,

Harman

[#4]

The CM server log (in /var/log/cloudera-scm-server/) may have a stack trace for this error which can help us diagnose what is going on, even if you don't re-install everything.

There's a Cloudera Manager configuration to enable API debug logging. Look at the top of the screen for Administration -> Settings, then use the left search box and search for API, and enable the option "Enable Debugging of API". Once this is checked, new API requests will log a message to the CM server log.

Thanks,
Darren

[#5]

Hey Darren,

Thanks a lot for all your help and patience. Also, is there a way out to enable debugging and change web port using API ?

Logs from my server are:

 Body:
{"items": [{"type": "NAVIGATORMETADATASERVER", "name": "NAVIGATORMETADATASERVER-1", "hostRef": {"hostId": "my-host-name"}}]}
2015-04-23 04:56:37,280 WARN 1161865304@scm-web-140:com.cloudera.cmf.persist.ReadOnlyDatabaseTaskCallable: Error while executing read only database task
java.lang.NullPointerException

2015-04-23 04:56:37,282 WARN 1161865304@scm-web-140:org.apache.cxf.phase.PhaseInterceptorChain: Interceptor for {http://api.cloudera.com/}ApiRootResourceImpl has thrown exception, unwinding now
java.lang.RuntimeException: java.lang.NullPointerException

Caused by: java.lang.NullPointerException

Thanks,

Harman

[#6]

Hey Darren,

Did you get a chance to look at the error from CM Server logs ?

Thanks,

Harman

[#7]

I'm having this same issue when installing using Cloudera Manager API. Were you able to install Navigator Metadata Server role using API?