Working with Storm Topologies
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Viewing Event Logs

The Storm "logviewer" process should be running so that you can view the logged tuples. If it is not already running, start the log viewer by running the following command from the storm installation directory:

bin/storm logviewer 
  1. From the Storm UI, navigate to the specific spout or bolt component page.
  2. Click on the "events" link in the Debug column of the component summary. This will open a view similar to the following:

    Each line in the event log contains an entry corresponding to a tuple emitted from a specific spout or bolt, presented in a comma-separated format:

    Timestamp, Component name, Component task-id, MessageId (incase of anchoring), List of emitted values
  3. Navigate between different pages to view logged events.