Fixed - "None of slaves were synced" error is thrown during RLock acquisition. #4621

redisson/src/main/java/org/redisson/RedissonBaseLock.java

@@ -207,12 +207,13 @@ public abstract class RedissonBaseLock extends RedissonExpirable implements RLoc
 
     protected <T> RFuture<T> evalWriteAsync(String key, Codec codec, RedisCommand<T> evalCommandType, String script, List<Object> keys, Object... params) {
         MasterSlaveEntry entry = commandExecutor.getConnectionManager().getEntry(getRawName());
-        int availableSlaves;
-        if (entry != null) {
-            availableSlaves = entry.getAvailableSlaves();
-        } else {
-            availableSlaves = 0;
+
+        CompletionStage<Map<String, String>> replicationFuture = CompletableFuture.completedFuture(Collections.emptyMap());
+        if (!(commandExecutor instanceof CommandBatchService) && entry != null && entry.getAvailableSlaves() > 0) {
+            replicationFuture = commandExecutor.writeAsync(entry, null, RedisCommands.INFO_REPLICATION);
         }
+        CompletionStage<T> resFuture = replicationFuture.thenCompose(r -> {
+            Integer availableSlaves = Integer.valueOf(r.getOrDefault("connected_slaves", "0"));
 
             CommandBatchService executorService = createCommandBatchService(availableSlaves);
             RFuture<T> result = executorService.evalWriteAsync(key, codec, evalCommandType, script, keys, params);
@@ -233,7 +234,9 @@ public abstract class RedissonBaseLock extends RedissonExpirable implements RLoc
 
                 return commandExecutor.getNow(result.toCompletableFuture());
             });
-        return new CompletableFutureWrapper<>(f);
+            return f;
+        });
+        return new CompletableFutureWrapper<>(resFuture);
     }
 
     private CommandBatchService createCommandBatchService(int availableSlaves) {