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Receiving alert from ambari metrics .Unable to connect .can anyone help me to find the issue .

16 Jul 2017 14:57:43,945 ERROR [ambari-metrics-retrieval-service-thread-18320] MetricsRetrievalService:421 - Unable to retrieve metrics from https://hostname:8042/jmx. Subsequent failures will be suppressed from the log for 20 minutes.

tried curl command b

curl -X GET --negotiate -u : -H "Accept: application/json" 'https://hostname/jmx'

curl: (60) Peer certificate cannot be authenticated with known CA certificates More details here:

curl performs SSL certificate verification by default, using a "bundle" of Certificate Authority (CA) public keys (CA certs). If the default bundle file isn't adequate, you can specify an alternate file using the --cacert option. If this HTTPS server uses a certificate signed by a CA represented in the bundle, the certificate verification probably failed due to a problem with the certificate (it might be expired, or the name might not match the domain name in the URL). If you'd like to turn off curl's verification of the certificate, use the -k (or --insecure) option.

Cloudera Employee

Hi @Abhishek Kumar

Do you have Storm in your cluster?

Can you take a look at


You need to add the Ambari Server principal name to the Storm nimbus.admins property in Ambari Web > Services > Storm > Configs.
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