It is not possible to connect to HP ALM server using the above mentioned pluigin.

INFO: 'Upload test result to ALM' Post Build Step is being invoked by xxx.
INFO: 1 test result file found.
INFO: Start to upload C:\xx\xx\xx\xx\builds\16\testng\testng-results.xml
INFO: Start to parse file: C:\xx\xx\xx\xx\builds\16\testng\testng-results.xml
INFO: parse resut file succeed.
INFO: Start to login to ALM Server.
Start login to ALM server.
Login to ALM Server at https://xxx/qcbin/ failed. Status Code: 302
WARN: there's exception while uploading C:\xx\xx\xx\xx\builds\16\testng\testng-results.xml.
INFO: 'Upload test result to ALM' Completed.
Build step 'Upload test result to ALM' changed build result to UNSTABLE
Finished: UNSTABLE