diff --git a/server/src/main/java/org/elasticsearch/snapshots/SnapshotShardsService.java b/server/src/main/java/org/elasticsearch/snapshots/SnapshotShardsService.java
index 4b205a55370..e0b9a4e48ac 100644
--- a/server/src/main/java/org/elasticsearch/snapshots/SnapshotShardsService.java
+++ b/server/src/main/java/org/elasticsearch/snapshots/SnapshotShardsService.java
@@ -357,6 +357,9 @@ public class SnapshotShardsService extends AbstractLifecycleComponent implements
             return;
         }
 
+        // Clear request deduplicator since we need to send all requests that were potentially not handled by the previous
+        // master again
+        remoteFailedRequestDeduplicator.clear();
         for (SnapshotsInProgress.Entry snapshot : snapshotsInProgress.entries()) {
             if (snapshot.state() == State.STARTED || snapshot.state() == State.ABORTED) {
                 Map<ShardId, IndexShardSnapshotStatus> localShards = currentSnapshotShards(snapshot.snapshot());
diff --git a/server/src/main/java/org/elasticsearch/transport/TransportRequestDeduplicator.java b/server/src/main/java/org/elasticsearch/transport/TransportRequestDeduplicator.java
index d929ef34ce2..6249975bf3e 100644
--- a/server/src/main/java/org/elasticsearch/transport/TransportRequestDeduplicator.java
+++ b/server/src/main/java/org/elasticsearch/transport/TransportRequestDeduplicator.java
@@ -53,6 +53,14 @@ public final class TransportRequestDeduplicator<T extends TransportRequest> {
         }
     }
 
+    /**
+     * Remove all tracked requests from this instance so that the first time {@link #executeOnce} is invoked with any request it triggers
+     * an actual request execution. Use this e.g. for requests to master that need to be sent again on master failover.
+     */
+    public void clear() {
+        requests.clear();
+    }
+
     public int size() {
         return requests.size();
     }