Merge pull request #2981 from alibaba/hotfix_jraft

[HOTFIX] Raft RPC being submitted to the Leader, error could not be…

config/src/main/java/com/alibaba/nacos/config/server/service/dump/EmbeddedDumpService.java

@@ -160,17 +160,8 @@ public class EmbeddedDumpService extends DumpService {
 
 	@Override
 	protected boolean canExecute() {
-		try {
-			// if is derby + raft mode, only leader can execute
-			CPProtocol protocol = protocolManager.getCpProtocol();
-			return protocol.isLeader(Constants.CONFIG_MODEL_RAFT_GROUP);
-		}
-		catch (NoSuchRaftGroupException e) {
-			return true;
-		}
-		catch (Throwable e) {
-			// It's impossible to get to this point
-			throw new RuntimeException(e);
-		}
+		// if is derby + raft mode, only leader can execute
+		CPProtocol protocol = protocolManager.getCpProtocol();
+		return protocol.isLeader(Constants.CONFIG_MODEL_RAFT_GROUP);
 	}
 }

config/src/main/java/com/alibaba/nacos/config/server/service/merge/MergeDatumService.java

@@ -26,7 +26,9 @@ import com.alibaba.nacos.config.server.utils.ContentUtils;
 import com.alibaba.nacos.config.server.utils.PropertyUtil;
 import com.alibaba.nacos.config.server.utils.TimeUtils;
 import com.alibaba.nacos.consistency.cp.CPProtocol;
+import com.alibaba.nacos.core.distributed.ProtocolManager;
 import com.alibaba.nacos.core.distributed.raft.exception.NoSuchRaftGroupException;
+import com.alibaba.nacos.core.utils.ApplicationUtils;
 import com.alibaba.nacos.core.utils.InetUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -53,8 +55,6 @@ public class MergeDatumService {
     static final AtomicInteger FINISHED = new AtomicInteger();
     static int total = 0;
 
-    private CPProtocol protocol;
-
     @Autowired
     public MergeDatumService(PersistService persistService) {
         this.persistService = persistService;
@@ -110,7 +110,8 @@ public class MergeDatumService {
             return true;
         }
         try {
-            return protocol.isLeader(Constants.CONFIG_MODEL_RAFT_GROUP);
+            ProtocolManager protocolManager = ApplicationUtils.getBean(ProtocolManager.class);
+            return protocolManager.getCpProtocol().isLeader(Constants.CONFIG_MODEL_RAFT_GROUP);
         } catch (NoSuchRaftGroupException e) {
             return true;
         } catch (Exception e) {

consistency/src/main/java/com/alibaba/nacos/consistency/cp/CPProtocol.java

@@ -30,8 +30,7 @@ public interface CPProtocol<C extends Config, P extends LogProcessor4CP> extends
 	 *
 	 * @param group business module info
 	 * @return is leader
-	 * @throws Exception
 	 */
-	boolean isLeader(String group) throws Exception;
+	boolean isLeader(String group);
 
 }

core/src/main/java/com/alibaba/nacos/core/distributed/raft/JRaftProtocol.java

@@ -209,7 +209,7 @@ public class JRaftProtocol
 	}
 
 	@Override
-	public boolean isLeader(String group) throws Exception {
+	public boolean isLeader(String group) {
 		Node node = raftServer.findNodeByGroup(group);
 		if (node == null) {
 			throw new NoSuchRaftGroupException(group);

core/src/main/java/com/alibaba/nacos/core/distributed/raft/JRaftServer.java

@@ -16,10 +16,10 @@
 
 package com.alibaba.nacos.core.distributed.raft;
 
+import com.alibaba.nacos.common.JustForTest;
 import com.alibaba.nacos.common.model.RestResult;
 import com.alibaba.nacos.common.utils.ConvertUtils;
 import com.alibaba.nacos.common.utils.LoggerUtils;
-import com.alibaba.nacos.common.utils.StringUtils;
 import com.alibaba.nacos.common.utils.ThreadUtils;
 import com.alibaba.nacos.consistency.LogProcessor;
 import com.alibaba.nacos.consistency.SerializeFactory;
@@ -39,11 +39,8 @@ import com.alibaba.nacos.core.distributed.raft.utils.JRaftUtils;
 import com.alibaba.nacos.core.distributed.raft.utils.RaftExecutor;
 import com.alibaba.nacos.core.distributed.raft.utils.RaftOptionsBuilder;
 import com.alibaba.nacos.core.monitor.MetricsMonitor;
-import com.alibaba.nacos.core.notify.NotifyCenter;
 import com.alibaba.nacos.core.utils.ApplicationUtils;
-import com.alibaba.nacos.core.utils.ClassUtils;
 import com.alibaba.nacos.core.utils.Loggers;
-import com.alibaba.nacos.core.utils.TimerContext;
 import com.alipay.sofa.jraft.CliService;
 import com.alipay.sofa.jraft.Node;
 import com.alipay.sofa.jraft.RaftGroupService;
@@ -64,8 +61,8 @@ import com.alipay.sofa.jraft.rpc.RpcServer;
 import com.alipay.sofa.jraft.rpc.impl.cli.CliClientServiceImpl;
 import com.alipay.sofa.jraft.util.BytesUtil;
 import com.alipay.sofa.jraft.util.Endpoint;
-import com.google.protobuf.Message;
 import com.google.common.base.Joiner;
+import com.google.protobuf.Message;
 import org.springframework.util.CollectionUtils;
 
 import java.nio.ByteBuffer;
@@ -138,11 +135,13 @@ public class JRaftServer {
 		// System.getProperties().setProperty("bolt.channel_write_buf_low_water_mark", String.valueOf(64 * 1024 * 1024));
 		// System.getProperties().setProperty("bolt.channel_write_buf_high_water_mark", String.valueOf(256 * 1024 * 1024));
 
-		System.getProperties().setProperty("bolt.netty.buffer.low.watermark", String.valueOf(128 * 1024 * 1024));
-		System.getProperties().setProperty("bolt.netty.buffer.high.watermark", String.valueOf(256 * 1024 * 1024));
+		System.getProperties().setProperty("bolt.netty.buffer.low.watermark",
+				String.valueOf(128 * 1024 * 1024));
+		System.getProperties().setProperty("bolt.netty.buffer.high.watermark",
+				String.valueOf(256 * 1024 * 1024));
 	}
 
-	public JRaftServer() throws Exception {
+	public JRaftServer() {
 		this.conf = new Configuration();
 	}
 
@@ -272,7 +271,8 @@ public class JRaftServer {
 			machine.setNode(node);
 			RouteTable.getInstance().updateConfiguration(groupName, configuration);
 
-			RaftExecutor.executeByCommon(() -> registerSelfToCluster(groupName, localPeerId, configuration));
+			RaftExecutor.executeByCommon(
+					() -> registerSelfToCluster(groupName, localPeerId, configuration));
 
 			// Turn on the leader auto refresh for this group
 			Random random = new Random();
@@ -305,21 +305,25 @@ public class JRaftServer {
 						}
 						catch (Throwable t) {
 							MetricsMonitor.raftReadIndexFailed();
-							future.completeExceptionally(new ConsistencyException("The conformance protocol is temporarily unavailable for reading", t));
+							future.completeExceptionally(new ConsistencyException(
+									"The conformance protocol is temporarily unavailable for reading",
+									t));
 						}
 						return;
 					}
 					MetricsMonitor.raftReadIndexFailed();
 					Loggers.RAFT.error("ReadIndex has error : {}", status.getErrorMsg());
-					future.completeExceptionally(
-							new ConsistencyException("The conformance protocol is temporarily unavailable for reading, " + status.getErrorMsg()));
+					future.completeExceptionally(new ConsistencyException(
+							"The conformance protocol is temporarily unavailable for reading, "
+									+ status.getErrorMsg()));
 				}
 			});
 			return future;
 		}
 		catch (Throwable e) {
 			MetricsMonitor.raftReadFromLeader();
-			Loggers.RAFT.warn("Raft linear read failed, go to Leader read logic : {}", e.toString());
+			Loggers.RAFT.warn("Raft linear read failed, go to Leader read logic : {}",
+					e.toString());
 			// run raft read
 			readFromLeader(request, future);
 			return future;
@@ -333,20 +337,25 @@ public class JRaftServer {
 					@Override
 					public void accept(Response response, Throwable throwable) {
 						if (Objects.nonNull(throwable)) {
-							future.completeExceptionally(new ConsistencyException("The conformance protocol is temporarily unavailable for reading", throwable));
+							future.completeExceptionally(new ConsistencyException(
+									"The conformance protocol is temporarily unavailable for reading",
+									throwable));
 							return;
 						}
 						if (response.getSuccess()) {
 							future.complete(response);
-						} else {
-							future.completeExceptionally(
-									new ConsistencyException("The conformance protocol is temporarily unavailable for reading, " + response.getErrMsg()));
+						}
+						else {
+							future.completeExceptionally(new ConsistencyException(
+									"The conformance protocol is temporarily unavailable for reading, "
+											+ response.getErrMsg()));
 						}
 					}
 				});
 	}
 
-	public CompletableFuture<Response> commit(final String group, final Message data, final CompletableFuture<Response> future) {
+	public CompletableFuture<Response> commit(final String group, final Message data,
+			final CompletableFuture<Response> future) {
 		LoggerUtils
 				.printIfDebugEnabled(Loggers.RAFT, "data requested this time : {}", data);
 		final RaftGroupTuple tuple = findTupleByGroup(group);
@@ -374,12 +383,12 @@ public class JRaftServer {
 	 * Add yourself to the Raft cluster
 	 *
 	 * @param groupId raft group
-	 * @param selfIp local raft node address
-	 * @param conf {@link Configuration} without self info
+	 * @param selfIp  local raft node address
+	 * @param conf    {@link Configuration} without self info
 	 * @return join success
 	 */
 	void registerSelfToCluster(String groupId, PeerId selfIp, Configuration conf) {
-		for ( ; ; ) {
+		for (; ; ) {
 			List<PeerId> peerIds = cliService.getPeers(groupId, conf);
 			if (peerIds.contains(selfIp)) {
 				return;
@@ -428,14 +437,10 @@ public class JRaftServer {
 	public void applyOperation(Node node, Message data, FailoverClosure closure) {
 		final Task task = new Task();
 		task.setDone(new NacosClosure(data, status -> {
-			NacosClosure.NStatus nStatus = (NacosClosure.NStatus) status;
-			if (Objects.nonNull(nStatus.getThrowable())) {
-				closure.setThrowable(nStatus.getThrowable());
-			}
-			else {
-				closure.setData(nStatus.getResult());
-			}
-			closure.run(nStatus);
+			NacosClosure.NacosStatus nacosStatus = (NacosClosure.NacosStatus) status;
+			closure.setThrowable(nacosStatus.getThrowable());
+			closure.setResponse(nacosStatus.getResponse());
+			closure.run(nacosStatus);
 		}));
 		task.setData(ByteBuffer.wrap(data.toByteArray()));
 		node.apply(task);
@@ -452,10 +457,11 @@ public class JRaftServer {
 						public void complete(Object o, Throwable ex) {
 							if (Objects.nonNull(ex)) {
 								closure.setThrowable(ex);
-								closure.run(new Status(RaftError.UNKNOWN, ex.getMessage()));
+								closure.run(
+										new Status(RaftError.UNKNOWN, ex.getMessage()));
 								return;
 							}
-							closure.setData(o);
+							closure.setResponse((Response) o);
 							closure.run(Status.OK());
 						}
 
@@ -491,7 +497,8 @@ public class JRaftServer {
 				RestResult<String> result = maintainService.execute(params);
 				if (result.ok()) {
 					successCnt.incrementAndGet();
-				} else {
+				}
+				else {
 					Loggers.RAFT.error("Node removal failed : {}", result);
 				}
 			}
@@ -513,7 +520,8 @@ public class JRaftServer {
 			Configuration oldConf = instance.getConfiguration(groupName);
 			String oldLeader = Optional.ofNullable(instance.selectLeader(groupName))
 					.orElse(PeerId.emptyPeer()).getEndpoint().toString();
-			status = instance.refreshConfiguration(this.cliClientService, groupName, rpcRequestTimeoutMs);
+			status = instance.refreshConfiguration(this.cliClientService, groupName,
+					rpcRequestTimeoutMs);
 			if (!status.isOk()) {
 				Loggers.RAFT
 						.error("Fail to refresh route configuration for group : {}, status is : {}",
@@ -548,12 +556,16 @@ public class JRaftServer {
 		return cliService;
 	}
 
-	public class RaftGroupTuple {
+	public static class RaftGroupTuple {
 
-		private final LogProcessor processor;
-		private final Node node;
-		private final RaftGroupService raftGroupService;
-		private final NacosStateMachine machine;
+		private LogProcessor processor;
+		private Node node;
+		private RaftGroupService raftGroupService;
+		private NacosStateMachine machine;
+
+		@JustForTest
+		public RaftGroupTuple() {
+		}
 
 		public RaftGroupTuple(Node node, LogProcessor processor,
 				RaftGroupService raftGroupService, NacosStateMachine machine) {

core/src/main/java/com/alibaba/nacos/core/distributed/raft/NacosClosure.java

@@ -16,8 +16,10 @@
 
 package com.alibaba.nacos.core.distributed.raft;
 
+import com.alibaba.nacos.consistency.entity.Response;
 import com.alipay.sofa.jraft.Closure;
 import com.alipay.sofa.jraft.Status;
+import com.alipay.sofa.jraft.error.RaftError;
 import com.google.protobuf.Message;
 
 /**
@@ -25,76 +27,113 @@ import com.google.protobuf.Message;
  */
 public class NacosClosure implements Closure {
 
-    private final Message log;
+    private final Message message;
     private final Closure closure;
-    private Throwable throwable;
-    private Object object;
+    private final NacosStatus nacosStatus = new NacosStatus();
 
-    public NacosClosure(Message log, Closure closure) {
-        this.log = log;
+    public NacosClosure(Message message, Closure closure) {
+        this.message = message;
         this.closure = closure;
     }
 
     @Override
     public void run(Status status) {
-        if (closure != null) {
-            NStatus status1 = new NStatus(status, throwable);
-            status1.setResult(object);
-            closure.run(status1);
-        }
+        nacosStatus.setStatus(status);
+        closure.run(nacosStatus);
     }
 
-    public Object getObject() {
-        return object;
-    }
-
-    public void setObject(Object object) {
-        this.object = object;
+    public void setResponse(Response response) {
+        this.nacosStatus.setResponse(response);
     }
 
     public void setThrowable(Throwable throwable) {
-        this.throwable = throwable;
+        this.nacosStatus.setThrowable(throwable);
     }
 
-    public Closure getClosure() {
-        return closure;
-    }
-
-    public Message getLog() {
-        return log;
+    public Message getMessage() {
+        return message;
     }
 
     // Pass the Throwable inside the state machine to the outer layer
 
     @SuppressWarnings("PMD.ClassNamingShouldBeCamelRule")
-    public static class NStatus extends Status {
+    public static class NacosStatus extends Status {
 
         private Status status;
 
-        private Object result;
+        private Response response = null;
 
-        private Throwable throwable;
-
-        public NStatus(Status status, Throwable throwable) {
-            super();
-            this.status = status;
-            this.throwable = throwable;
-        }
-
-        public Status getStatus() {
-            return status;
-        }
+        private Throwable throwable = null;
 
         public void setStatus(Status status) {
             this.status = status;
         }
 
-        public Object getResult() {
-            return result;
+        @Override
+        public void reset() {
+            status.reset();
         }
 
-        public void setResult(Object result) {
-            this.result = result;
+        @Override
+        public boolean isOk() {
+            return status.isOk();
+        }
+
+        @Override
+        public void setCode(int code) {
+            status.setCode(code);
+        }
+
+        @Override
+        public int getCode() {
+            return status.getCode();
+        }
+
+        @Override
+        public RaftError getRaftError() {
+            return status.getRaftError();
+        }
+
+        @Override
+        public void setErrorMsg(String errMsg) {
+            status.setErrorMsg(errMsg);
+        }
+
+        @Override
+        public void setError(int code, String fmt, Object... args) {
+            status.setError(code, fmt, args);
+        }
+
+        @Override
+        public void setError(RaftError error, String fmt, Object... args) {
+            status.setError(error, fmt, args);
+        }
+
+        @Override
+        public String toString() {
+            return status.toString();
+        }
+
+        @Override
+        public Status copy() {
+            NacosStatus copy = new NacosStatus();
+            copy.status = this.status;
+            copy.response = this.response;
+            copy.throwable = this.throwable;
+            return copy;
+        }
+
+        @Override
+        public String getErrorMsg() {
+            return status.getErrorMsg();
+        }
+
+        public Response getResponse() {
+            return response;
+        }
+
+        public void setResponse(Response response) {
+            this.response = response;
         }
 
         public Throwable getThrowable() {

core/src/main/java/com/alibaba/nacos/core/distributed/raft/NacosStateMachine.java

@@ -32,7 +32,6 @@ import com.alibaba.nacos.consistency.snapshot.Writer;
 import com.alibaba.nacos.core.distributed.raft.utils.JRaftUtils;
 import com.alibaba.nacos.core.notify.NotifyCenter;
 import com.alibaba.nacos.core.utils.Loggers;
-import com.alibaba.nacos.core.utils.TimerContext;
 import com.alipay.sofa.jraft.Closure;
 import com.alipay.sofa.jraft.Iterator;
 import com.alipay.sofa.jraft.Node;
@@ -94,7 +93,7 @@ class NacosStateMachine extends StateMachineAdapter {
 				try {
 					if (iter.done() != null) {
 						closure = (NacosClosure) iter.done();
-						message = closure.getLog();
+						message = closure.getMessage();
 					}
 					else {
 						final ByteBuffer data = iter.getData();
@@ -246,9 +245,9 @@ class NacosStateMachine extends StateMachineAdapter {
 				RouteTable.getInstance().getConfiguration(node.getGroupId()).getPeers());
 	}
 
-	private void postProcessor(Object data, NacosClosure closure) {
+	private void postProcessor(Response data, NacosClosure closure) {
 		if (Objects.nonNull(closure)) {
-			closure.setObject(data);
+			closure.setResponse(data);
 		}
 	}
 

core/src/main/java/com/alibaba/nacos/core/distributed/raft/exception/NoSuchRaftGroupException.java

@@ -19,7 +19,7 @@ package com.alibaba.nacos.core.distributed.raft.exception;
 /**
  * @author <a href="mailto:liaochuntao@live.com">liaochuntao</a>
  */
-public class NoSuchRaftGroupException extends Exception {
+public class NoSuchRaftGroupException extends RuntimeException {
 
 	private static final long serialVersionUID = 1755681688785678765L;
 

core/src/main/java/com/alibaba/nacos/core/distributed/raft/processor/AbstractProcessor.java

@@ -71,13 +71,13 @@ public abstract class AbstractProcessor {
 	}
 
 	protected void execute(JRaftServer server, final RpcContext asyncCtx, final Message log, final JRaftServer.RaftGroupTuple tuple) {
-		FailoverClosure<Object> closure = new FailoverClosure<Object>() {
+		FailoverClosure closure = new FailoverClosure() {
 
-			Object data;
+			Response data;
 			Throwable ex;
 
 			@Override
-			public void setData(Object data) {
+			public void setResponse(Response data) {
 				this.data = data;
 			}
 
@@ -93,14 +93,7 @@ public abstract class AbstractProcessor {
 					asyncCtx.sendResponse(Response.newBuilder().setErrMsg(ex.toString())
 							.setSuccess(false).build());
 				} else {
-					ByteString bytes = Objects.nonNull(data) ? ByteString.copyFrom(serializer.serialize(data)) : ByteString.EMPTY;
-
-					Response response = Response.newBuilder()
-							.setSuccess(true)
-							.setData(bytes)
-							.build();
-
-					asyncCtx.sendResponse(response);
+					asyncCtx.sendResponse(data);
 				}
 			}
 		};

core/src/main/java/com/alibaba/nacos/core/distributed/raft/utils/FailoverClosure.java

@@ -16,6 +16,7 @@
 
 package com.alibaba.nacos.core.distributed.raft.utils;
 
+import com.alibaba.nacos.consistency.entity.Response;
 import com.alipay.sofa.jraft.Closure;
 
 /**
@@ -23,14 +24,14 @@ import com.alipay.sofa.jraft.Closure;
  *
  * @author <a href="mailto:liaochuntao@live.com">liaochuntao</a>
  */
-public interface FailoverClosure<T> extends Closure {
+public interface FailoverClosure extends Closure {
 
     /**
      * Set the return interface if needed
      *
-     * @param data data
+     * @param response {@link Response} data
      */
-    void setData(T data);
+    void setResponse(Response response);
 
     /**
      * Catch exception

core/src/main/java/com/alibaba/nacos/core/distributed/raft/utils/FailoverClosureImpl.java

@@ -16,11 +16,11 @@
 
 package com.alibaba.nacos.core.distributed.raft.utils;
 
-import com.alibaba.nacos.common.utils.LoggerUtils;
+import com.alibaba.nacos.common.utils.Objects;
+import com.alibaba.nacos.consistency.entity.Response;
 import com.alibaba.nacos.consistency.exception.ConsistencyException;
-import com.alibaba.nacos.core.utils.Loggers;
 import com.alipay.sofa.jraft.Status;
-import java.util.Objects;
+
 import java.util.concurrent.CompletableFuture;
 
 /**
@@ -28,39 +28,36 @@ import java.util.concurrent.CompletableFuture;
  *
  * @author <a href="mailto:liaochuntao@live.com">liaochuntao</a>
  */
-public class FailoverClosureImpl<T> implements FailoverClosure<T> {
+public class FailoverClosureImpl implements FailoverClosure {
 
-    private final CompletableFuture<T> future;
-    private volatile T data;
-    private volatile Throwable throwable;
+	private final CompletableFuture<Response> future;
+	private volatile Response data;
+	private volatile Throwable throwable;
 
-    public FailoverClosureImpl(final CompletableFuture<T> future) {
-        this.future = future;
-    }
+	public FailoverClosureImpl(final CompletableFuture<Response> future) {
+		this.future = future;
+	}
 
-    @Override
-    public void setData(T data) {
-        this.data = data;
-    }
+	@Override
+	public void setResponse(Response data) {
+		this.data = data;
+	}
 
-    @Override
-    public void setThrowable(Throwable throwable) {
-        this.throwable = throwable;
-    }
+	@Override
+	public void setThrowable(Throwable throwable) {
+		this.throwable = throwable;
+	}
 
-    @Override
-    public void run(Status status) {
-        if (status.isOk()) {
-            boolean success = future.complete(data);
-            LoggerUtils.printIfDebugEnabled(Loggers.RAFT, "future.complete execute {}", success);
-            return;
-        }
-        final Throwable throwable = this.throwable;
-        if (Objects.nonNull(throwable)) {
-            future.completeExceptionally(new ConsistencyException(throwable.toString()));
-        } else {
-            future.completeExceptionally(new ConsistencyException("operation failure"));
-        }
-    }
+	@Override
+	public void run(Status status) {
+		if (status.isOk()) {
+			future.complete(data);
+			return;
+		}
+		final Throwable throwable = this.throwable;
+		future.completeExceptionally(Objects.nonNull(throwable) ?
+				new ConsistencyException(throwable.toString()) :
+				new ConsistencyException("operation failure"));
+	}
 
 }

core/src/test/java/com/alibaba/nacos/core/distributed/raft/processor/AbstractProcessorTest.java

@@ -0,0 +1,59 @@
+package com.alibaba.nacos.core.distributed.raft.processor;
+
+import com.alibaba.nacos.consistency.SerializeFactory;
+import com.alibaba.nacos.consistency.entity.Log;
+import com.alibaba.nacos.consistency.entity.Response;
+import com.alibaba.nacos.core.distributed.raft.JRaftServer;
+import com.alibaba.nacos.core.distributed.raft.utils.FailoverClosure;
+import com.alipay.sofa.jraft.Node;
+import com.alipay.sofa.jraft.Status;
+import com.alipay.sofa.jraft.error.RaftError;
+import com.alipay.sofa.jraft.rpc.Connection;
+import com.alipay.sofa.jraft.rpc.RpcContext;
+import com.google.protobuf.Message;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.concurrent.atomic.AtomicReference;
+
+public class AbstractProcessorTest {
+
+	private JRaftServer server = new JRaftServer() {
+		@Override
+		public void applyOperation(Node node, Message data, FailoverClosure closure) {
+			closure.setResponse(Response.newBuilder().setSuccess(false).setErrMsg("Error message transmission").build());
+			closure.run(new Status(RaftError.UNKNOWN, "Error message transmission"));
+		}
+	};
+
+	@Test
+	public void testErrorThroughRPC() {
+		final AtomicReference<Response> reference = new AtomicReference<>();
+
+		RpcContext context = new RpcContext() {
+			@Override
+			public void sendResponse(Object responseObj) {
+				reference.set((Response) responseObj);
+			}
+
+			@Override
+			public Connection getConnection() {
+				return null;
+			}
+
+			@Override
+			public String getRemoteAddress() {
+				return null;
+			}
+		};
+		AbstractProcessor processor = new NacosLogProcessor(server, SerializeFactory.getDefault());
+		processor.execute(server, context, Log.newBuilder().build(), new JRaftServer.RaftGroupTuple());
+
+		Response response = reference.get();
+		Assert.assertNotNull(response);
+
+		Assert.assertEquals("Error message transmission", response.getErrMsg());
+		Assert.assertFalse(response.getSuccess());
+	}
+
+}