SERVER-48078 Remove OpDebug invariant that relies on monotonic clock source

(cherry picked from commit c2479d57f11528846cd4b87cd62cd75e5e2eebfc)

1 files changed, 2 insertions, 2 deletions

diff --git a/src/mongo/db/curop.h b/src/mongo/db/curop.h
index f4d07ad5f29..b5b0394320f 100644
--- a/src/mongo/db/curop.h
+++ b/src/mongo/db/curop.h
@@ -552,8 +552,8 @@ public:
         if (_debug.remoteOpWaitTime) {
             Microseconds end = elapsedTimeTotal();
             invariant(_remoteOpStartTime);
-            invariant(*_remoteOpStartTime <= end);
-            Microseconds delta = end - *_remoteOpStartTime;
+            // A backward shift of the realtime system clock could lead to a negative delta.
+            Microseconds delta = std::max((end - *_remoteOpStartTime), Microseconds{0});
             *_debug.remoteOpWaitTime += delta;
             _remoteOpStartTime = boost::none;
         }