Hello, This timeout exceptions relates to CM Metrics Store (firehose) being overloaded. Please review the below article - https://community.cloudera.com/t5/Customer/How-to-enable-the-entity-summary-servlet-in-Cloudera-Manager/ta-p/294697 Check KAFKA_PRODUCER and KAFKA_CONSUMER, if we have too many entities (millions), this might cause SMON to request a lot of memory to process the metrics causing timeout exceptions in the SMM server. To avoid a huge amount of entities that will cause issues with services like SMON, use a client.id in your producers, from the consumer point of view, use a group.id to avoid creating random ids every time a client is executed. Alternatively Resetting/deleting the Firehose LevelDB storage could be an option to recover from this. If the SMM server is getting timeout exceptions, check the SMM heap size, it’s recommended (depending on the number of resources we are monitoring) to increase this, acceptable values for production environments are between 8~16GB for SMM.
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