Add an API function to turn debugging on for specific transactions/sessions
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Key: TS-1079
URL: https://issues.apache.org/jira/browse/TS-1079
Project: Traffic Server
Issue Type: Improvement
Components: Core, HTTP
Reporter: Uri Shachar
Priority: Minor
When attempting to troubleshoot issues on a production ATS system, it is
often impossible/difficult to turn on any of the 'high-volume' debug tags like
http due to the performance impact.
This enhancement allows a plugin to set a debug flag for a specific txn/ssn,
and replaces some of the internal Debug calls with a new function that checks
if the flag is turned on, and outputs the debug line regardless of the tag if
it is (The diags enable/disable flag is still taken into account).
The API will also have TSDebugSpecific in order to allow plugins to use the
same functionality.
In addition, we might consider adding an internal config file (remap-like) to
allow turning this flag on without plugin intervention.
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