SERVER-33233 Don't stall ftdc due to running out of tickets

1 files changed, 14 insertions, 0 deletions

diff --git a/src/mongo/db/concurrency/locker.h b/src/mongo/db/concurrency/locker.h
index 3e70d000fe8..ff133800115 100644
--- a/src/mongo/db/concurrency/locker.h
+++ b/src/mongo/db/concurrency/locker.h
@@ -334,11 +334,25 @@ public:
         return _shouldConflictWithSecondaryBatchApplication;
     }
 
+    /**
+     * If set to false, this opts out of the ticket mechanism. This should be used sparingly
+     * for special purpose threads, such as FTDC.
+     */
+    void setShouldAcquireTicket(bool newValue) {
+        invariant(!isLocked());
+        _shouldAcquireTicket = newValue;
+    }
+    bool shouldAcquireTicket() const {
+        return _shouldAcquireTicket;
+    }
+
+
 protected:
     Locker() {}
 
 private:
     bool _shouldConflictWithSecondaryBatchApplication = true;
+    bool _shouldAcquireTicket = true;
 };
 
 }  // namespace mongo