Пример #1
0
func (s *ManagerTestSuite) TestRecoverWorkerPanic(t *C) {
	// Create and start manager with mock workers.
	w1StopChan := make(chan bool)
	w1 := mock.NewQanWorker("qan-worker-1", w1StopChan, nil, nil, true)
	f := mock.NewQanWorkerFactory([]*mock.QanWorker{w1})
	mockConnFactory := &mock.ConnectionFactory{Conn: s.nullmysql}
	m := qan.NewManager(s.logger, mockConnFactory, s.clock, s.iterFactory, f, s.spool, s.im)
	t.Assert(m, NotNil)

	config := &qan.Config{
		ServiceInstance: s.mysqlInstance,
		MaxSlowLogSize:  1000,
		MaxWorkers:      2,
		Interval:        60,
		WorkerRunTime:   60,
		Start: []mysql.Query{
			mysql.Query{Set: "SET GLOBAL slow_query_log=OFF"},
		},
		Stop: []mysql.Query{
			mysql.Query{Set: "SET GLOBAL slow_query_log=OFF"},
		},
	}
	qanConfig, _ := json.Marshal(config)
	cmd := &proto.Cmd{
		Ts:   time.Now(),
		Cmd:  "StartService",
		Data: qanConfig,
	}
	reply := m.Handle(cmd)
	t.Assert(reply.Error, Equals, "")

	test.WaitStatusPrefix(1, m, "qan-log-parser", "Idle")
	test.DrainLogChan(s.logChan)

	// Start mock worker.  All it does is panic, much like fipar.
	now := time.Now()
	i1 := &qan.Interval{
		Filename:    "slow.log",
		StartOffset: 0,
		EndOffset:   100,
		StartTime:   now,
		StopTime:    now,
	}
	s.intervalChan <- i1
	<-w1.Running() // wait for manager to run worker

	// For now, worker panic only results in error to log.
	var gotError *proto.LogEntry
	timeout := time.After(200 * time.Millisecond)
GET_LOG:
	for {
		select {
		case l := <-s.logChan:
			if l.Level == 3 && strings.HasPrefix(l.Msg, "Lost interval 0 slow.log") {
				gotError = l
				break GET_LOG
			}
		case <-timeout:
			break GET_LOG
		}
	}
	t.Check(gotError, NotNil)

	// Stop manager
	reply = m.Handle(&proto.Cmd{Cmd: "StopService"})
	t.Assert(reply.Error, Equals, "")
}
Пример #2
0
func (s *ManagerTestSuite) TestWaitRemoveSlowLog(t *C) {

	// Same as TestRotateAndRemoveSlowLog, but we use mock workers so we can
	// test that slow log is not removed until previous workers are done.
	// Mock worker factory will return our mock workers when manager calls Make().
	w1StopChan := make(chan bool)
	w1 := mock.NewQanWorker("qan-worker-1", w1StopChan, nil, nil, false)

	w2StopChan := make(chan bool)
	w2 := mock.NewQanWorker("qan-worker-2", w2StopChan, nil, nil, false)

	// Let's take this time to also test that MaxWorkers is enforced.
	w3 := mock.NewQanWorker("qan-worker-3", nil, nil, nil, false)

	f := mock.NewQanWorkerFactory([]*mock.QanWorker{w1, w2, w3})

	// Clean up files that may interfere with test.  Then copy the test log.
	slowlog := "slow006.log"
	files, _ := filepath.Glob("/tmp/" + slowlog + "-[0-9]*")
	for _, file := range files {
		os.Remove(file)
	}
	cp := exec.Command("cp", testlog.Sample+slowlog, "/tmp/"+slowlog)
	cp.Run()

	// Create and start manager with mock workers.
	mockConnFactory := &mock.ConnectionFactory{Conn: s.nullmysql}
	m := qan.NewManager(s.logger, mockConnFactory, s.clock, s.iterFactory, f, s.spool, s.im)
	if m == nil {
		t.Fatal("Create qan.Manager")
	}
	config := &qan.Config{
		ServiceInstance:   s.mysqlInstance,
		MaxSlowLogSize:    1000,
		RemoveOldSlowLogs: true, // done after w2 and w1 done
		MaxWorkers:        2,    // w1 and w2 but not w3
		Interval:          60,
		WorkerRunTime:     60,
		Start: []mysql.Query{
			mysql.Query{Set: "SET GLOBAL slow_query_log=OFF"},
		},
		Stop: []mysql.Query{
			mysql.Query{Set: "SET GLOBAL slow_query_log=OFF"},
		},
	}
	qanConfig, _ := json.Marshal(config)
	cmd := &proto.Cmd{
		Ts:   time.Now(),
		Cmd:  "StartService",
		Data: qanConfig,
	}
	reply := m.Handle(cmd)
	t.Assert(reply.Error, Equals, "")

	test.WaitStatusPrefix(1, m, "qan-log-parser", "Idle")

	// Start first mock worker (w1) with interval 0 - 736.  The worker's Run()
	// func won't return until we send true to its stop chan, so manager will
	// think worker is still running until then.
	now := time.Now()
	i1 := &qan.Interval{
		Filename:    "/tmp/" + slowlog,
		StartOffset: 0,
		EndOffset:   736,
		StartTime:   now,
		StopTime:    now,
	}
	s.intervalChan <- i1
	<-w1.Running() // wait for manager to run worker

	// Start 2nd mock worker (w2) with interval 736 - 1833.  Manager will rotate
	// but not remove original slow log because w1 is still running.
	i2 := &qan.Interval{
		Filename:    "/tmp/" + slowlog,
		StartOffset: 736,
		EndOffset:   1833,
		StartTime:   now,
		StopTime:    now,
	}
	s.intervalChan <- i2
	<-w2.Running()

	test.WaitStatus(1, m, "qan-log-parser", "Idle (2 of 2 running)")

	/**
	 * Worker status test
	 */

	// Workers should have status and QAN manager should report them all.
	status := m.Status()
	t.Check(status["qan-worker-1"], Equals, "ok")
	t.Check(status["qan-worker-2"], Equals, "ok")
	t.Check(status["qan-worker-3"], Equals, "") // not running due to MaxWorkers

	/**
	 * Quick side test: qan.Config.MaxWorkers is enforced.
	 */
	test.DrainLogChan(s.logChan)
	s.intervalChan <- i2
	logs := test.WaitLogChan(s.logChan, 3)
	test.WaitStatus(1, m, "qan-log-parser", "Idle (2 of 2 running)")
	gotWarning := false
	for _, log := range logs {
		if log.Level == proto.LOG_WARNING && strings.Contains(log.Msg, "All workers busy") {
			gotWarning = true
			break
		}
	}
	if !gotWarning {
		t.Error("Too many workers causes \"All workers busy\" warning")
	}

	// Original slow log should no longer exist; it was rotated away, but...
	if _, err := os.Stat("/tmp/" + slowlog); !os.IsNotExist(err) {
		t.Error("/tmp/" + slowlog + " no longer exists")
	}

	// ...old slow log should exist because w1 is still running.
	files, _ = filepath.Glob("/tmp/" + slowlog + "-[0-9]*")
	if len(files) != 1 {
		t.Errorf("w1 running so old slow log not removed, got %+v", files)
	}
	defer func() {
		for _, file := range files {
			os.Remove(file)
		}
	}()

	// Stop w2 which is holding "holding" the "lock" on removing the old
	// slog log (figuratively speaking; there are no real locks).  Because
	// w1 is still running, manager should not remove the old log yet because
	// w1 could still be parsing it.
	w2StopChan <- true
	test.WaitStatus(1, m, "qan-log-parser", "Idle (1 of 2 running)")
	if _, err := os.Stat(files[0]); os.IsNotExist(err) {
		t.Errorf("w1 still running so old slow log not removed")
	}

	// Stop w1 and now, even though slow log was rotated for w2, manager
	// should remove old slow log.
	w1StopChan <- true
	test.WaitStatus(1, m, "qan-log-parser", "Idle (0 of 2 running)")
	if _, err := os.Stat(files[0]); !os.IsNotExist(err) {
		t.Errorf("w1 done running so old slow log removed")
	}

	// Stop manager
	reply = m.Handle(&proto.Cmd{Cmd: "StopService"})
	t.Assert(reply.Error, Equals, "")
}