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Monitoring using the web UI

The Monitor page in the web UI displays summary information for the cluster and each of its applications, servers, and agents.

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Above, you can see that two applications are running.The display is showing the App Rate (events per second). Click Events Processed, App CPU%, Server Memory, or Server CPU% to graph those statistics instead.

By default, the Monitor page displays the most recent data. To look at older data, click Time Range > Specific Time and select a date and start time.

The S in the name in the Node Overview list indicates that the node is a regular server (S) rather than a Forwarding Agent (A).

To monitor an individual app, click its name in the Apps Overview list or select Monitor App from the app's menu on the Apps page.

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Interval Report provides access to the REPORT START and REPORT STOP commands through the UI (see Using the REPORT START / STOP command). For details about Latency Report, see  Using the REPORT LATENCY command.

Click one of the buttons at left to see statistics for components of a particular type:

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When you see a More Details button, you can click it for more detailed information. For example, for KafkaWriter, you will see something like this:

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Click Event Log to see application-related errors and status changes for all nodes in the cluster. Status changes include an app being loaded, deployed, started, stopped, and undeployed, but not dropped.

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By default, the event log shows status changes and errors for the past five minutes from all nodes (there may be a delay before they appear). Use the filter drop-downs to select a narrower set of data. If you choose a time range, the event log will not be updated with new events until you clear the filter.