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Case #


Type: APM as a Service

Old Article ID: 1568

Old Article Type: documentation



Detail the contextual information specific to the issue; i.e. Product, Version, Agent, System, etc.

  • IE Agent
  • FF Agent

Describe the problem, from the user perspective

We are seeing Error Code 10001 on Single URL tests. What does this mean?

Clearly list the Steps to resolve the issue

This error indicates that the response received from a machine during a test does not match the HTTP standard. The HTTP standard dictates that all HTTP responses should contain a line, either in the page's header or body, that contains the following information:

HTTP/(version returncode)

Sample status lines include:

  • HTTP/1.1 200
  • HTTP/1.0 302
  • HTTP/1.1 404

If a test does not receive a status code from a HTTP response, the Dynatrace Synthetic Classic Platform reports it as 10001 - Server Response Missing Status Line.

For example, a test makes a connection with your application server but the server doesn't respond within 25 seconds. After 25 seconds, the underlying operating system terminates the connection. Since every web server always includes a status code in its response, the Browser Agent, awaiting the HTTP status code, marks the absence of a HTTP status code with error code 10001.