I recently installed a traffic server, version is 6.2.0, after installation, I use traffic_server -r 1 do regression testing, the last tip is REGRESSION_TEST DONE: FAILED, I view the trace regression test, found the FAILED REGRESSION_RESULT SDK_API_HttpParentProxySet_Success: FAILED, online didn't find the reason, so I want to ask you, this place is the reason why failure? Regression testing and online said success to illustrate the basic function of the software is normal, so I want to ask a regression test failure can also what is the effect of the use of this software? Understand people answer for me answer, thank you very much! Before installing traffic server is also the local failure, and then the test on the server of the company, I have installed traffic server cache does not work, is also related to this reason? Thank you very much!