From a77884e4ec00e4f75a6a9e924f62273759f7b9ca Mon Sep 17 00:00:00 2001
From: Derek Collison <derek@nats.io>
Date: Thu, 13 Apr 2023 18:20:13 -0700
Subject: [PATCH] Do not let the redelivered count go down on re-applying on
 restarts

Signed-off-by: Derek Collison <derek@nats.io>
---
 server/filestore.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/server/filestore.go b/server/filestore.go
index 70d9eef8..caf0b945 100644
--- a/server/filestore.go
+++ b/server/filestore.go
@@ -6687,7 +6687,10 @@ func (o *consumerFileStore) UpdateDelivered(dseq, sseq, dc uint64, ts int64) err
 			if o.state.Redelivered == nil {
 				o.state.Redelivered = make(map[uint64]uint64)
 			}
-			o.state.Redelivered[sseq] = dc - 1
+			// Only update if greater then what we already have.
+			if o.state.Redelivered[sseq] < dc {
+				o.state.Redelivered[sseq] = dc - 1
+			}
 		}
 	} else {
 		// For AckNone just update delivered and ackfloor at the same time.