Fixed - CommandDecoder.messageDecoder() method throws NPE if RBatch object used with executionMode = IN_MEMORY. (regression since 3.18.1) #4725

redisson/src/main/java/org/redisson/client/handler/CommandDecoder.java

@@ -98,7 +98,7 @@ public class CommandDecoder extends ReplayingDecoder<State> {
                 }
             }
         } else {
-            if (!holder.getChannelPromise().isSuccess()) {
+            if (holder.getChannelPromise().isDone() && !holder.getChannelPromise().isSuccess()) {
                 sendNext(ctx.channel());
                 // throw REPLAY error
                 in.indexOf(Integer.MAX_VALUE/2, Integer.MAX_VALUE, (byte) 0);

redisson/src/main/java/org/redisson/command/RedisExecutor.java

@@ -187,7 +187,7 @@ public class RedisExecutor<V, R> {
         TimerTask task = timeout -> {
             if (connectionFuture.cancel(false)) {
                 exception = new RedisTimeoutException("Unable to acquire connection! " + this.connectionFuture +
-                        "Increase connection pool size. "
+                        "Increase connection pool size or timeout. "
                         + "Node source: " + source
                         + ", command: " + LogHelper.toString(command, params)
                         + " after " + attempt + " retry attempts");