Diagnostic Metrics Collection Details

Describes the type of data collected by Telemetry Publisher and Databus Producer and the Cloudera services that provide the data.

Telemetry Publisher and Databus Producer collect and send the following diagnostic metrics to Workload Manager:

  • MapReduce Jobs — Telemetry Publisher and Databus Producer poll the YARN Job History Server for recently completed MapReduce jobs. For each of these jobs, Telemetry Publisher and Databus Producer collects the configuration and jhist file, which is the job history file that contains job and task counters, from HDFS. Telemetry Publisher and Databus Producer can be configured to collect MapReduce task logs from HDFS and send them to Workload Manager. By default, this log collection is turned off.
  • Spark Applications — Telemetry Publisher and Databus Producer poll the Spark History Server for recently completed Spark applications. For each of these applications, Telemetry Publisher and Databus Producer collect their event log from HDFS. Telemetry Publisher and Databus Producer can be configured to collect the executor logs of Spark applications from HDFS and send them to Workload Manager. By default, this data collection is turned off.
  • Oozie Workflows — Telemetry Publisher and Databus Producer polls Oozie servers for recently completed Oozie workflows and sends the details to Workload Manager.
  • Hive Queries — An agent periodically searches for query detail files that are generated by HiveServer2 after a query completes and then sends the details from those files to Telemetry Publisher or Databus Producer.
  • Impala Queries — An agent periodically looks for query profiles of recently completed queries and sends them to Telemetry Publisher and Databus Producer.