14360: Debug log when acquiring lock.

Arvados-DCO-1.1-Signed-off-by: Tom Clegg <tclegg@veritasgenetics.com>

diff --git a/lib/dispatchcloud/scheduler/run_queue.go b/lib/dispatchcloud/scheduler/run_queue.go
index c8c25131eabf5e6b8343d050802a72cc9d1fd024..dab1b6068a768c6f0ca4eb1204351f55fe28ccad 100644 (file)
--- a/lib/dispatchcloud/scheduler/run_queue.go
+++ b/lib/dispatchcloud/scheduler/run_queue.go
@@ -154,6 +154,7 @@ func (sch *Scheduler) bgLock(logger logrus.FieldLogger, uuid string) {
                        logger.WithError(err).Warn("error locking container")
                        return
                }
+               logger.Debug("lock succeeded")
                ctr, ok := sch.queue.Get(uuid)
                if !ok {
                        logger.Error("(BUG?) container disappeared from queue after Lock succeeded")