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    A web application can encounter a variety of problems. Most of them are handled by the default system error-detection rules in BMC Real End User Experience Monitoring Software Edition. However, you can extend this capability with up to 100 custom error-detection rules that reflect specific needs of your web application.

    Message types

    Message type

    Typical use case


    Application-specific errors

    Many application environments have their own error pages that handle problems gracefully.

    For example, an application shows an error page when a user enters an invalid password. This page would return a normal HTTP status code of 200.

    There is two ways to detect this error:

    • Create a custom error condition that looks for the error page by matching its URI stem, because the page is being delivered correctly. You can create a custom error-detection rule to look for that error and measure it.
    • Create a custom field that extracts content from the error page. Based on the value of this custom field, the error-detection rule triggers an error or not.

    Built-in errors

    You might only care about a 404 Page Not Found error only if it affects a container or a document but not a component of a page.

    Turn off the system default "not found" error-detection rule and replace it with a more detailed one that looks for "not found" errors on certain types of objects.

    Subjective or performance errors

    If a PDF file takes more than 2 minutes to download, you might consider this a problem.

    Create a custom rule that is triggered when objects ending with .pdf have an end-to-end time longer than 2 minutes.

    Interesting events in your web traffic

    You might consider a particular user's logging on to be important.

    Define an error-detection rule that contains an informational condition to watch for this.

    In the Administration > Thresholds and problem detection > Error detection rules page of a Real User Analyzer, you can perform the following operations:

    • Edit email alert settings for all the rules
    • Edit rules
    • Copy rules (to create a rule with similar settings to another rule)
    • Delete rules
    • Change severity for the rules (Error or Informational condition)
    • Change categories for the rules:
      • Network error
      • Client error
      • Server error
      • Application error
      • Content error
      • Custom error
    • Change priorities for the rules (the order of rules firing)
    • Performing bulk operations to the selected rules (turn on of off, enable or disable alerting for a rule, etc.)

    Related Topics

    Creating a custom error-detection rule

    Configuring error alert notifications