JMeter - Diagnostic

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JMeter does not generally use pop-up dialog boxes for errors, as these would interfere with running tests.

If JMeter detects an error during a test, a message will be written to the log file. The log file name is defined in the jmeter.properties file (or using the -j option, see below). It defaults to jmeter.log , and will be found in the directory from which JMeter was launched.

  • Since JMeter 2.6, menu Options > Log Viewer displays the log file in a bottom pane on main JMeter window.
  • Since JMeter 2.7 (GUI mode), the number of error/fatal messages logged in the log file is displayed at top-right.

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