There have different result when I build two jobs in the same slave node.
one job(JOB A) success->TestNG Reports Processing: FINISH
another(JOB B) happen->testng-results.xml was last modified before this build started. Ignoring it.
JOB A spend time>JOB B spend time

then, I googled that it can be resolved by sync the clocks.
But it's unreasonable. why the two job have diff result!
It seems TestNG plugin judged the time of file TESTS-TestSuites.xml when process report. But it have a unreasonable judgement and led to the below situation occur:
If the job spend time>the Interval time between master and slave, it worked,like JOB A.
If the job spend time<the Interval time between master and slave, it didn't worke.like JOB B.