[BUG] unit-test case failed about jupiter HOT 2 CLOSED

==================
WARNING: DATA RACE
Read at 0x00c0000ab188 by goroutine 9:
  github.com/douyu/jupiter/pkg/util/xtime.(*rashTimer).newTimer()
      /home/travis/gopath/src/github.com/douyu/jupiter/pkg/util/xtime/rash_timer.go:293 +0x74
  github.com/douyu/jupiter/pkg/util/xtime.(*rashTimer).NewTimer()
      /home/travis/gopath/src/github.com/douyu/jupiter/pkg/util/xtime/rash_timer.go:377 +0xa7
  github.com/douyu/jupiter/pkg/util/xtime.TestTimer()
      /home/travis/gopath/src/github.com/douyu/jupiter/pkg/util/xtime/rash_timer_test.go:26 +0x52
  testing.tRunner()
      /home/travis/.gimme/versions/go1.14.4.linux.amd64/src/testing/testing.go:991 +0x1eb
Previous write at 0x00c0000ab188 by goroutine 10:
  github.com/douyu/jupiter/pkg/util/xtime.(*rashTimer).onTick()
      /home/travis/gopath/src/github.com/douyu/jupiter/pkg/util/xtime/rash_timer.go:234 +0x114
  github.com/douyu/jupiter/pkg/util/xtime.(*rashTimer).run()
      /home/travis/gopath/src/github.com/douyu/jupiter/pkg/util/xtime/rash_timer.go:311 +0xf0
Goroutine 9 (running) created at:
  testing.(*T).Run()
      /home/travis/.gimme/versions/go1.14.4.linux.amd64/src/testing/testing.go:1042 +0x660
  testing.runTests.func1()
      /home/travis/.gimme/versions/go1.14.4.linux.amd64/src/testing/testing.go:1284 +0xa6
  testing.tRunner()
      /home/travis/.gimme/versions/go1.14.4.linux.amd64/src/testing/testing.go:991 +0x1eb
  testing.runTests()
      /home/travis/.gimme/versions/go1.14.4.linux.amd64/src/testing/testing.go:1282 +0x527
  testing.(*M).Run()
      /home/travis/.gimme/versions/go1.14.4.linux.amd64/src/testing/testing.go:1199 +0x2ff
  main.main()
      _testmain.go:132 +0x337
Goroutine 10 (running) created at:
  github.com/douyu/jupiter/pkg/util/xtime.NewRashTimer()
      /home/travis/gopath/src/github.com/douyu/jupiter/pkg/util/xtime/rash_timer.go:164 +0x3b0
  github.com/douyu/jupiter/pkg/util/xtime.TestTimer()
      /home/travis/gopath/src/github.com/douyu/jupiter/pkg/util/xtime/rash_timer_test.go:25 +0x3b
  testing.tRunner()
      /home/travis/.gimme/versions/go1.14.4.linux.amd64/src/testing/testing.go:991 +0x1eb
==================
    TestTimer: testing.go:906: race detected during execution of test
--- FAIL: TestTimer (0.51s)

$-> go version

go version go1.14.4 darwin/amd64

$-> go test -v -race pkg/util/xtime/rash_timer_test.go pkg/util/xtime/rash_timer.go
=== RUN   TestTimer
--- PASS: TestTimer (0.50s)
PASS
ok  	command-line-arguments	0.730s