[Bug] [API] If the single log length is long, it will causes the View Log page to hang (#10612)

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/controller/LoggerController.java

@@ -25,6 +25,7 @@ import org.apache.dolphinscheduler.api.exceptions.ApiException;
 import org.apache.dolphinscheduler.api.service.LoggerService;
 import org.apache.dolphinscheduler.api.utils.Result;
 import org.apache.dolphinscheduler.common.Constants;
+import org.apache.dolphinscheduler.dao.entity.ResponseTaskLog;
 import org.apache.dolphinscheduler.dao.entity.User;
 
 import org.springframework.beans.factory.annotation.Autowired;
@@ -77,7 +78,7 @@ public class LoggerController extends BaseController {
     @ResponseStatus(HttpStatus.OK)
     @ApiException(QUERY_TASK_INSTANCE_LOG_ERROR)
     @AccessLogAnnotation(ignoreRequestArgs = "loginUser")
-    public Result<String> queryLog(@ApiIgnore @RequestAttribute(value = Constants.SESSION_USER) User loginUser,
+    public Result<ResponseTaskLog> queryLog(@ApiIgnore @RequestAttribute(value = Constants.SESSION_USER) User loginUser,
                                             @RequestParam(value = "taskInstanceId") int taskInstanceId,
                                             @RequestParam(value = "skipLineNum") int skipNum,
                                             @RequestParam(value = "limit") int limit) {

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/LoggerService.java

@@ -18,6 +18,7 @@
 package org.apache.dolphinscheduler.api.service;
 
 import org.apache.dolphinscheduler.api.utils.Result;
+import org.apache.dolphinscheduler.dao.entity.ResponseTaskLog;
 import org.apache.dolphinscheduler.dao.entity.User;
 
 import java.util.Map;
@@ -35,7 +36,7 @@ public interface LoggerService {
      * @param limit limit
      * @return log string data
      */
-    Result<String> queryLog(int taskInstId, int skipLineNum, int limit);
+    Result<ResponseTaskLog> queryLog(int taskInstId, int skipLineNum, int limit);
 
 
     /**

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/LoggerServiceImpl.java

@@ -24,6 +24,7 @@ import org.apache.dolphinscheduler.api.service.ProjectService;
 import org.apache.dolphinscheduler.api.utils.Result;
 import org.apache.dolphinscheduler.common.Constants;
 import org.apache.dolphinscheduler.dao.entity.Project;
+import org.apache.dolphinscheduler.dao.entity.ResponseTaskLog;
 import org.apache.dolphinscheduler.dao.entity.TaskDefinition;
 import org.apache.dolphinscheduler.dao.entity.TaskInstance;
 import org.apache.dolphinscheduler.dao.entity.User;
@@ -100,7 +101,7 @@ public class LoggerServiceImpl extends BaseServiceImpl implements LoggerService
      */
     @Override
     @SuppressWarnings("unchecked")
-    public Result<String> queryLog(int taskInstId, int skipLineNum, int limit) {
+    public Result<ResponseTaskLog> queryLog(int taskInstId, int skipLineNum, int limit) {
 
         TaskInstance taskInstance = processService.findTaskInstanceById(taskInstId);
 
@@ -110,9 +111,10 @@ public class LoggerServiceImpl extends BaseServiceImpl implements LoggerService
         if (StringUtils.isBlank(taskInstance.getHost())) {
             return Result.error(Status.TASK_INSTANCE_HOST_IS_NULL);
         }
-        Result<String> result = new Result<>(Status.SUCCESS.getCode(), Status.SUCCESS.getMsg());
+        Result<ResponseTaskLog> result = new Result<>(Status.SUCCESS.getCode(), Status.SUCCESS.getMsg());
         String log = queryLog(taskInstance, skipLineNum, limit);
-        result.setData(log);
+        int lineNum = log.split("\\r\\n").length;
+        result.setData(new ResponseTaskLog(lineNum, log));
         return result;
     }
 

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/ProcessInstanceServiceImpl.java

@@ -53,6 +53,7 @@ import org.apache.dolphinscheduler.dao.entity.ProcessDefinition;
 import org.apache.dolphinscheduler.dao.entity.ProcessInstance;
 import org.apache.dolphinscheduler.dao.entity.ProcessTaskRelationLog;
 import org.apache.dolphinscheduler.dao.entity.Project;
+import org.apache.dolphinscheduler.dao.entity.ResponseTaskLog;
 import org.apache.dolphinscheduler.dao.entity.TaskDefinition;
 import org.apache.dolphinscheduler.dao.entity.TaskDefinitionLog;
 import org.apache.dolphinscheduler.dao.entity.TaskInstance;
@@ -352,10 +353,10 @@ public class ProcessInstanceServiceImpl extends BaseServiceImpl implements Proce
     private void addDependResultForTaskList(List<TaskInstance> taskInstanceList) throws IOException {
         for (TaskInstance taskInstance : taskInstanceList) {
             if (TASK_TYPE_DEPENDENT.equalsIgnoreCase(taskInstance.getTaskType())) {
-                Result<String> logResult = loggerService.queryLog(
+                Result<ResponseTaskLog> logResult = loggerService.queryLog(
                     taskInstance.getId(), Constants.LOG_QUERY_SKIP_LINE_NUMBER, Constants.LOG_QUERY_LIMIT);
                 if (logResult.getCode() == Status.SUCCESS.ordinal()) {
-                    String log = logResult.getData();
+                    String log = logResult.getData().getMessage();
                     Map<String, DependResult> resultMap = parseLogForDependentResult(log);
                     taskInstance.setDependentResult(JSONUtils.toJsonString(resultMap));
                 }

dolphinscheduler-dao/src/main/java/org/apache/dolphinscheduler/dao/entity/ResponseTaskLog.java

@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.dao.entity;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+/**
+ * log of the logger service response
+ */
+@Data
+@AllArgsConstructor
+public class ResponseTaskLog {
+    private int lineNum;
+    private String message;
+}

dolphinscheduler-log-server/src/main/java/org/apache/dolphinscheduler/server/log/LoggerRequestProcessor.java

@@ -40,6 +40,7 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.util.Collections;
@@ -113,9 +114,25 @@ public class LoggerRequestProcessor implements NettyRequestProcessor {
                 List<String> lines = readPartFileContent(rollViewLogPath,
                         rollViewLogRequest.getSkipLineNum(), rollViewLogRequest.getLimit());
                 StringBuilder builder = new StringBuilder();
+                final int MaxResponseLogSize = 65535;
+                int totalLogByteSize = 0;
                 for (String line : lines) {
+                    //If a single line of log is exceed max response size, cut off the line
+                    final int lineByteSize = line.getBytes(StandardCharsets.UTF_8).length;
+                    if (lineByteSize >= MaxResponseLogSize) {
+                        builder.append(line, 0, MaxResponseLogSize)
+                                .append(" [this line's size ").append(lineByteSize).append(" bytes is exceed ")
+                                .append(MaxResponseLogSize).append(" bytes, so only ")
+                                .append(MaxResponseLogSize).append(" characters are reserved for performance reasons.]")
+                                .append("\r\n");
+                    } else {
                         builder.append(line).append("\r\n");
                     }
+                    totalLogByteSize += lineByteSize;
+                    if (totalLogByteSize >= MaxResponseLogSize) {
+                        break;
+                    }
+                }
                 RollViewLogResponseCommand rollViewLogRequestResponse = new RollViewLogResponseCommand(builder.toString());
                 channel.writeAndFlush(rollViewLogRequestResponse.convert2Command(command.getOpaque()));
                 break;

dolphinscheduler-ui/src/views/projects/task/instance/index.tsx

@@ -76,11 +76,11 @@ const TaskInstance = defineComponent({
           taskInstanceId: Number(row.id),
           limit: variables.limit,
           skipLineNum: variables.skipLineNum
-        }).then((res: string) => {
-          variables.logRef += res
-          if (res) {
+        }).then((res: any) => {
+          if (res?.message) {
+            variables.logRef += res.message
             variables.limit += 1000
-            variables.skipLineNum += 1000
+            variables.skipLineNum += res.lineNum
             getLogs(row)
           } else {
             variables.logLoadingRef = false