Cloudera Manager Service Monitor hangs up on a regular basis for troubleshooting

Display: An internal error occurred while querying Service Monitor (Error sending messages to firehose:mgmt-servicemonitor-)

1. Initial row detection is Smon service port 9999 and Firehose Port 9998 is not available

No, it's normal.

2. Debug Web (the node where the Activity_monitor service resides) on port 8087 (default)

I can't see the reason.

3. Go to the Service Monitor node and look at the following: Obviously Java heap settings are small, so you need to increase the Java heap settings

Cloudera Manager Service Monitor hangs up on a regular basis for troubleshooting