Merge branch 'main' into talzacc/respcommandinfo_refactor

libs/cluster/Server/ClusterProvider.cs

@@ -287,7 +287,7 @@ internal bool WaitForConfigTransition()
                 foreach (var s in sessions)
                 {
                     var entryEpoch = s.LocalCurrentEpoch;
-                    if (entryEpoch != 0 && entryEpoch >= currentEpoch)
+                    if (entryEpoch != 0 && entryEpoch < currentEpoch)
                         goto retry;
                 }
                 break;

libs/cluster/Server/Replication/CheckpointEntry.cs

@@ -43,7 +43,7 @@ public CheckpointEntry()
         }
 
         public long GetMinAofCoveredAddress()
-            => Math.Min(storeCheckpointCoveredAofAddress, objectCheckpointCoveredAofAddress);
+            => Math.Max(Math.Min(storeCheckpointCoveredAofAddress, objectCheckpointCoveredAofAddress), 64);
 
         /// <summary>
         /// Indicate addition of new reader by trying to increment reader counter

libs/cluster/Server/Replication/PrimaryOps/ReplicaSyncSession.cs

@@ -47,6 +47,7 @@ public void Dispose()
         public async Task<bool> SendCheckpoint()
         {
             errorMsg = default;
+            var retryCount = 0;
             var storeCkptManager = clusterProvider.GetReplicationLogCheckpointManager(StoreType.Main);
             var objectStoreCkptManager = clusterProvider.GetReplicationLogCheckpointManager(StoreType.Object);
             var current = clusterProvider.clusterManager.CurrentConfig;
@@ -96,6 +97,8 @@ public async Task<bool> SendCheckpoint()
                     {
                         localEntry.RemoveReader();
                         _ = Thread.Yield();
+                        if (retryCount++ > 10)
+                            throw new GarnetException("Attaching replica maximum retry count reached!");
                         goto retry;
                     }
                 }
@@ -110,6 +113,8 @@ public async Task<bool> SendCheckpoint()
                     {
                         localEntry.RemoveReader();
                         _ = Thread.Yield();
+                        if (retryCount++ > 10)
+                            throw new GarnetException("Attaching replica maximum retry count reached!");
                         goto retry;
                     }
                 }
@@ -187,7 +192,7 @@ public async Task<bool> SendCheckpoint()
                 var beginAddress = RecoveredReplicationOffset;
                 if (!recoverFromRemote)
                 {
-                    //If replica is ahead of this primary it will force itself to forget and start syncing from RecoveredReplicationOffset
+                    // If replica is ahead of this primary it will force itself to forget and start syncing from RecoveredReplicationOffset
                     if (replicaAofBeginAddress > ReplicationManager.kFirstValidAofAddress && replicaAofBeginAddress > RecoveredReplicationOffset)
                     {
                         logger?.LogInformation(

libs/server/Resp/ArrayCommands.cs

@@ -668,15 +668,25 @@ private bool NetworkSELECT(byte* ptr)
 
             readHead = (int)(ptr - recvBufferPtr);
 
-            if (string.Equals(result, "0"))
+            if (storeWrapper.serverOptions.EnableCluster)
             {
-                while (!RespWriteUtils.WriteDirect(CmdStrings.RESP_OK, ref dcurr, dend))
+                // Cluster mode does not allow DBID
+                while (!RespWriteUtils.WriteError(CmdStrings.RESP_ERR_GENERIC_SELECT_CLUSTER_MODE, ref dcurr, dend))
                     SendAndReset();
             }
             else
             {
-                while (!RespWriteUtils.WriteError("ERR invalid database index."u8, ref dcurr, dend))
-                    SendAndReset();
+
+                if (string.Equals(result, "0"))
+                {
+                    while (!RespWriteUtils.WriteDirect(CmdStrings.RESP_OK, ref dcurr, dend))
+                        SendAndReset();
+                }
+                else
+                {
+                    while (!RespWriteUtils.WriteError(CmdStrings.RESP_ERR_GENERIC_SELECT_INVALID_INDEX, ref dcurr, dend))
+                        SendAndReset();
+                }
             }
             return true;
         }
@@ -728,7 +738,6 @@ private bool NetworkKEYS<TGarnetApi>(int count, byte* ptr, ref TGarnetApi storag
             return true;
         }
 
-
         private bool NetworkSCAN<TGarnetApi>(int count, byte* ptr, ref TGarnetApi storageApi)
               where TGarnetApi : IGarnetApi
         {

libs/server/Resp/CmdStrings.cs

@@ -127,6 +127,9 @@ public static ReadOnlySpan<byte> GetConfig(ReadOnlySpan<byte> key)
         public static ReadOnlySpan<byte> RESP_ERR_GENERIC_VALUE_IS_NOT_INTEGER => "ERR value is not an integer or out of range."u8;
         public static ReadOnlySpan<byte> RESP_ERR_GENERIC_UKNOWN_SUBCOMMAND => "ERR Unknown subcommand. Try LATENCY HELP."u8;
         public static ReadOnlySpan<byte> RESP_ERR_GENERIC_INDEX_OUT_RANGE => "ERR index out of range"u8;
+        public static ReadOnlySpan<byte> RESP_ERR_GENERIC_SELECT_INVALID_INDEX => "ERR invalid database index."u8;
+        public static ReadOnlySpan<byte> RESP_ERR_GENERIC_SELECT_CLUSTER_MODE => "ERR SELECT is not allowed in cluster mode"u8;
+
         /// <summary>
         /// Response string templates
         /// </summary>

libs/server/StoreWrapper.cs

@@ -220,7 +220,8 @@ public void RecoverCheckpoint(bool recoverMainStoreFromToken = false, bool recov
             {
                 storeVersion = !recoverMainStoreFromToken ? store.Recover() : store.Recover(storeIndexToken, storeHlogToken);
                 if (objectStore != null) objectStoreVersion = !recoverObjectStoreFromToken ? objectStore.Recover() : objectStore.Recover(objectStoreIndexToken, objectStoreHlogToken);
-                lastSaveTime = DateTimeOffset.UtcNow;
+                if (storeVersion > 0 || objectStoreVersion > 0)
+                    lastSaveTime = DateTimeOffset.UtcNow;
             }
             catch (Exception ex)
             {
@@ -269,8 +270,8 @@ public long ReplayAOF(long untilAddress = -1)
             long replicationOffset = 0;
             try
             {
-                //When replaying AOF we do not want to write record again to AOF.
-                //So initialize local AofProcessor with recordToAof: false.
+                // When replaying AOF we do not want to write record again to AOF.
+                // So initialize local AofProcessor with recordToAof: false.
                 var aofProcessor = new AofProcessor(this, recordToAof: false, logger);
                 aofProcessor.Recover(untilAddress);
                 aofProcessor.Dispose();
@@ -578,22 +579,22 @@ void CompleteCheckpoint()
         /// <summary>
         /// Take a checkpoint if no checkpoint was taken after the provided time offset
         /// </summary>
-        /// <param name="afterTime"></param>
+        /// <param name="entryTime"></param>
         /// <returns></returns>
-        public async Task TakeOnDemandCheckpoint(DateTimeOffset afterTime)
+        public async Task TakeOnDemandCheckpoint(DateTimeOffset entryTime)
         {
-            //Take lock to ensure not other task will be taking a checkpoint
+            // Take lock to ensure no other task will be taking a checkpoint
             while (!StartCheckpoint())
                 await Task.Yield();
 
-            //If an external task has taken a checkpoint after the provided afterTime return
-            if (this.lastSaveTime > afterTime)
+            // If an external task has taken a checkpoint beyond the provided entryTime return
+            if (this.lastSaveTime > entryTime)
             {
                 CompleteCheckpoint();
                 return;
             }
 
-            //If no newer checkpoint was taken compared to the provided afterTime take a checkpoint
+            // Necessary to take a checkpoint because the latest checkpoint is before entryTime
             await CheckpointTask(StoreType.All, logger: logger);
         }