VSR/Replica: Evict client with new version

tigerbeetle · Mar 8, 2024 · 8061745 · 8061745
1 parent 293e2f2
commit 8061745
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diff --git a/src/vsr/message_header.zig b/src/vsr/message_header.zig
@@ -1185,6 +1185,7 @@ pub const Header = extern struct {
             reserved = 0,
             no_session = 1,
             version_too_low = 2,
+            version_too_high = 3,
 
             comptime {
                 for (std.enums.values(Reason), 0..) |reason, index| {

diff --git a/src/vsr/replica.zig b/src/vsr/replica.zig
@@ -4373,6 +4373,17 @@ pub fn ReplicaType(
                 return true;
             }
 
+            if (message.header.release > self.release) {
+                log.warn("{}: on_request: ignoring invalid version (client={} version={}>{})", .{
+                    self.replica,
+                    message.header.client,
+                    message.header.release,
+                    self.release,
+                });
+                self.send_eviction_message_to_client(message.header.client, .version_too_high);
+                return true;
+            }
+
             if (!message.header.operation.valid(StateMachine)) {
                 // Some possible causes:
                 // - client bug