HTTP StatusCode=0 is associated with incomplete capture of a hit or page and often with a labeling of the hit as: request canceled ("ReqCancelled=Client" "ReqCancelled=Server" or "ReqCancelled=True").
Request cancellation as interpreted by Passive Capture occurs for a number of reasons:
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The end user has stopped communication with the web server by closing the browser navigating away clicking the back button or stop or any other conceivable method.
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The actual length of the request or response data might differ from the value specified in the HTTP Content-Length header.? The client or server closing the TCP/IP connection causes this effect as can miscalculation and thus misreporting of the content length by the Web server as well as complete absence of the Content-Length header.
Generally it is unusual to see a high number of these types of pages (usually application span data related) and should be investigated with the help of IBM Tealeaf Customer Support.? Keep in mind it is not a Tealeaf problem but instead our surfacing of a problem elsewhere in the infrastructure.