TT Bigdata
JaneTTR
2026-02-18
目录

[22213]解决办法

# 一、问题现象：滚动更新后，只执行了一台

先看现象截图：滚动更新触发后，页面表现为“只更新一个”。

image-20260216201906287

滚动更新后：

image-20260216202038809

现象关键词

  • 滚动重启 / 滚动更新触发成功
  • 实际执行只落到一台主机（例如只重启 dev1.test.com 的 DATANODE）
  • 后续任务链直接退出，不再继续执行下一批 host

# 1、快速判断：不是 Agent 下发问题，而是调度链断了

从日志可以看到：命令仍然下发到了 agent（AgentCommandsPublisher.sendCommands），说明并不是“没下发”。

而真正致命的是：调度器执行 BatchRequest 的链路抛异常后退出，后续 host 的滚动步骤就没机会继续推进。

# 二、后台日志：ExecutionScheduleManager 抛 ClassCastException

直接看核心错误（截取关键段）：

2026-02-16 20:19:49,706 INFO  [ambari-client-thread-45] o.a.a.s.state.cluster.ClusterImpl:558 - Adding a new request schedule, clusterName = abc, id = 53, description = null
2026-02-16 20:19:49,706 INFO  [ambari-client-thread-45] o.a.a.s.state.cluster.ClusterImpl:558 - Adding a new request schedule, clusterName = abc, id = 53, description = null
2026-02-16 20:19:49,772 INFO  [ambari-client-thread-119] o.a.a.s.c.AmbariManagementControllerImpl:4152 - Received action execution request, clusterName=abc, request=isCommand :true, action :null, command :RESTART, inputs :{HAS_RESOURCE_FILTERS=true}, resourceFilters: [RequestResourceFilter{serviceName='HDFS', componentName='DATANODE', hostNames=[dev1.test.com]}], exclusive: false, clusterName :abc
2026-02-16 20:19:49,772 INFO  [ambari-client-thread-119] o.a.a.s.c.AmbariManagementControllerImpl:4152 - Received action execution request, clusterName=abc, request=isCommand :true, action :null, command :RESTART, inputs :{HAS_RESOURCE_FILTERS=true}, resourceFilters: [RequestResourceFilter{serviceName='HDFS', componentName='DATANODE', hostNames=[dev1.test.com]}], exclusive: false, clusterName :abc
2026-02-16 20:19:49,813 INFO  [ambari-client-thread-119] o.a.a.server.stageplanner.RoleGraph:175 - Detecting cycle graphs
2026-02-16 20:19:49,813 INFO  [ambari-client-thread-119] o.a.a.server.stageplanner.RoleGraph:175 - Detecting cycle graphs
2026-02-16 20:19:49,814 INFO  [ambari-client-thread-119] o.a.a.server.stageplanner.RoleGraph:176 - Graph:
(DATANODE, RESTART, 0)

2026-02-16 20:19:49,814 INFO  [ambari-client-thread-119] o.a.a.server.stageplanner.RoleGraph:176 - Graph:
(DATANODE, RESTART, 0)

2026-02-16 20:19:49,843 ERROR [ExecutionScheduler_Worker-2] o.a.a.s.s.AbstractLinearExecutionJob:93 - Exception caught on execution of job LinearExecutionJobs.BatchRequestJob-53-1. Exiting linear chain...
org.apache.ambari.server.AmbariException: Exception occurred while performing request
        at org.apache.ambari.server.scheduler.ExecutionScheduleManager.executeBatchRequest(ExecutionScheduleManager.java:683)
        at org.apache.ambari.server.state.scheduler.BatchRequestJob.doWork(BatchRequestJob.java:82)
        at org.apache.ambari.server.scheduler.AbstractLinearExecutionJob.execute(AbstractLinearExecutionJob.java:91)
        at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573)
Caused by: java.lang.ClassCastException: class org.glassfish.jersey.client.internal.HttpUrlConnector$1 cannot be cast to class java.lang.String (org.glassfish.jersey.client.internal.HttpUrlConnector$1 is in unnamed module of loader 'app'; java.lang.String is in module java.base of loader 'bootstrap')
        at org.apache.ambari.server.scheduler.ExecutionScheduleManager.convertToBatchRequestResponse(ExecutionScheduleManager.java:740)
        at org.apache.ambari.server.scheduler.ExecutionScheduleManager.performApiRequest(ExecutionScheduleManager.java:942)
        at org.apache.ambari.server.scheduler.ExecutionScheduleManager.executeBatchRequest(ExecutionScheduleManager.java:671)
        ... 4 common frames omitted
2026-02-16 20:19:49,843 ERROR [ExecutionScheduler_Worker-2] o.a.a.s.s.AbstractLinearExecutionJob:93 - Exception caught on execution of job LinearExecutionJobs.BatchRequestJob-53-1. Exiting linear chain...
org.apache.ambari.server.AmbariException: Exception occurred while performing request
        at org.apache.ambari.server.scheduler.ExecutionScheduleManager.executeBatchRequest(ExecutionScheduleManager.java:683)
        at org.apache.ambari.server.state.scheduler.BatchRequestJob.doWork(BatchRequestJob.java:82)
        at org.apache.ambari.server.scheduler.AbstractLinearExecutionJob.execute(AbstractLinearExecutionJob.java:91)
        at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573)
Caused by: java.lang.ClassCastException: class org.glassfish.jersey.client.internal.HttpUrlConnector$1 cannot be cast to class java.lang.String (org.glassfish.jersey.client.internal.HttpUrlConnector$1 is in unnamed module of loader 'app'; java.lang.String is in module java.base of loader 'bootstrap')
        at org.apache.ambari.server.scheduler.ExecutionScheduleManager.convertToBatchRequestResponse(ExecutionScheduleManager.java:740)
        at org.apache.ambari.server.scheduler.ExecutionScheduleManager.performApiRequest(ExecutionScheduleManager.java:942)
        at org.apache.ambari.server.scheduler.ExecutionScheduleManager.executeBatchRequest(ExecutionScheduleManager.java:671)
        ... 4 common frames omitted
2026-02-16 20:19:49,855 INFO  [ExecutionScheduler_Worker-2] org.quartz.core.JobRunShell:207 - Job LinearExecutionJobs.BatchRequestJob-53-1 threw a JobExecutionException: 
org.quartz.JobExecutionException: org.apache.ambari.server.AmbariException: Exception occurred while performing request
        at org.apache.ambari.server.scheduler.AbstractLinearExecutionJob.execute(AbstractLinearExecutionJob.java:97)
        at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573)
Caused by: org.apache.ambari.server.AmbariException: Exception occurred while performing request
        at org.apache.ambari.server.scheduler.ExecutionScheduleManager.executeBatchRequest(ExecutionScheduleManager.java:683)
        at org.apache.ambari.server.state.scheduler.BatchRequestJob.doWork(BatchRequestJob.java:82)
        at org.apache.ambari.server.scheduler.AbstractLinearExecutionJob.execute(AbstractLinearExecutionJob.java:91)
        ... 2 common frames omitted
Caused by: java.lang.ClassCastException: class org.glassfish.jersey.client.internal.HttpUrlConnector$1 cannot be cast to class java.lang.String (org.glassfish.jersey.client.internal.HttpUrlConnector$1 is in unnamed module of loader 'app'; java.lang.String is in module java.base of loader 'bootstrap')
        at org.apache.ambari.server.scheduler.ExecutionScheduleManager.convertToBatchRequestResponse(ExecutionScheduleManager.java:740)
        at org.apache.ambari.server.scheduler.ExecutionScheduleManager.performApiRequest(ExecutionScheduleManager.java:942)
        at org.apache.ambari.server.scheduler.ExecutionScheduleManager.executeBatchRequest(ExecutionScheduleManager.java:671)
        ... 4 common frames omitted
2026-02-16 20:19:49,892 INFO  [agent-command-publisher-0] o.a.a.s.e.p.AgentCommandsPublisher:173 - AgentCommandsPublisher.sendCommands: sending ExecutionCommand for host dev1.test.com, role DATANODE, roleCommand CUSTOM_COMMAND, and command ID 142-0, task ID 1103
2026-02-16 20:19:49,892 INFO  [agent-command-publisher-0] o.a.a.s.e.p.AgentCommandsPublisher:173 - AgentCommandsPublisher.sendCommands: sending ExecutionCommand for host dev1.test.com, role DATANODE, roleCommand CUSTOM_COMMAND, and command ID 142-0, task ID 1103
2026-02-16 20:19:50,092 INFO  [agent-message-monitor-0] o.a.a.server.events.MessageEmitter:218 - Schedule execution command emitting, retry: 0, messageId: 1
2026-02-16 20:19:50,092 INFO  [agent-message-monitor-0] o.a.a.server.events.MessageEmitter:218 - Schedule execution command emitting, retry: 0, messageId: 1
2026-02-16 20:19:50,094 WARN  [agent-message-retry-0] o.a.a.server.events.MessageEmitter:255 - Reschedule execution command emitting, retry: 1, messageId: 1
2026-02-16 20:19:50,094 WARN  [agent-message-retry-0] o.a.a.server.events.MessageEmitter:255 - Reschedule execution command emitting, retry: 1, messageId: 1
2026-02-16 20:19:58,414 WARN  [ambari-client-thread-45] o.glassfish.jersey.internal.Errors:168 - The following warnings have been detected: WARNING: A HTTP GET method, public javax.ws.rs.core.Response org.apache.ambari.server.api.services.TaskService.getTask(java.lang.String,javax.ws.rs.core.HttpHeaders,javax.ws.rs.core.UriInfo,java.lang.String), should not consume any entity.
WARNING: A HTTP GET method, public javax.ws.rs.core.Response org.apache.ambari.server.api.services.TaskService.getComponents(java.lang.String,javax.ws.rs.core.HttpHeaders,javax.ws.rs.core.UriInfo), should not consume any entity.
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结论先行

真正导致“滚动重启只执行一台”的原因： 线性调度链（LinearExecutionJob）在执行 BatchRequestJob 时抛异常 → 直接退出 linear chain → 后续滚动步骤不再继续。

# 1、异常点位归因

维度 内容
触发线程 ExecutionScheduler_Worker-*
任务类型 LinearExecutionJobs.BatchRequestJob-<scheduleId>-<seq>
入口方法 ExecutionScheduleManager.executeBatchRequest
根因方法 ExecutionScheduleManager.convertToBatchRequestResponse
异常类型 ClassCastException (HttpUrlConnector$1 -> String)

为什么是 ClassCastException？

Jersey 2.x 下，Response.getEntity() 返回的对象并不保证是 String。 如果代码把 entity 强转 String，在某些 connector/stream 场景会出现 HttpUrlConnector$1 这种内部类型，直接炸。

# 三、修复点：替换 ExecutionScheduleManager.convertToBatchRequestResponse

本次修改文件：

  • ambari-server/src/main/java/org/apache/ambari/server/scheduler/ExecutionScheduleManager.java

定位截图：

image-20260217230728753

# 1、替换为安全读取 Response body 的实现

将原方法替换为如下实现（保持原有语义，同时解决 Jersey 2.x 的 entity 读取问题）：



  private BatchRequestResponse convertToBatchRequestResponse(Response clientResponse) {
    BatchRequestResponse batchRequestResponse = new BatchRequestResponse();

    // 0) NULL 保护：避免 performApiRequest / performApiGetRequest 异常时 response=null 导致 NPE
    if (clientResponse == null) {
      LOG.error("Ambari API response is NULL (clientResponse == null)");
      batchRequestResponse.setReturnCode(500);
      batchRequestResponse.setStatus(HostRoleStatus.FAILED.toString());
      batchRequestResponse.setReturnMessage("Null response from Ambari API call");
      return batchRequestResponse;
    }

    // 1) HTTP status
    final int retCode = clientResponse.getStatus();
    batchRequestResponse.setReturnCode(retCode);

    // 2) Read response body safely (Jersey 2.x correct way)
    String responseString = "";
    try {
      if (clientResponse.hasEntity()) {
        responseString = clientResponse.readEntity(String.class);
        if (responseString == null) {
          responseString = "";
        }
      }
    } catch (Exception ex) {
      // 不要让异常继续冒泡，否则会把 scheduler chain 直接打断
      LOG.warn("Failed to read Ambari API response entity as String. status={}", retCode, ex);
      responseString = "";
    }

    // 3) Debug print raw response (safe truncate)
    if (LOG.isDebugEnabled()) {
      final int MAX_LEN = 8192; // 8KB 够看结构，避免刷屏
      String bodyPreview = responseString;
      if (bodyPreview.length() > MAX_LEN) {
        bodyPreview = bodyPreview.substring(0, MAX_LEN) + "...[truncated, total=" + responseString.length() + "]";
      }

      String mediaType = "null";
      try {
        if (clientResponse.getMediaType() != null) {
          mediaType = clientResponse.getMediaType().toString();
        }
      } catch (Exception ignore) {
      }

      LOG.debug("Ambari API raw response: httpStatus={}, contentType={}, length={}\n{}", retCode, mediaType, responseString.length(), bodyPreview);
    }

    // 4) Parse JSON (keep original semantics)
    Map<String, Object> httpResponseMap;
    try {
      httpResponseMap = gson.<Map<String, Object>>fromJson(responseString, Map.class);
      LOG.debug("Processing response as JSON");
    } catch (JsonSyntaxException e) {
      LOG.debug("Response is not valid JSON object. Recording as is");
      httpResponseMap = new HashMap<>();
      httpResponseMap.put("message", responseString);
    } catch (Exception e) {
      LOG.warn("Unexpected exception while parsing response JSON. status={}", retCode, e);
      httpResponseMap = new HashMap<>();
      httpResponseMap.put("message", responseString);
    }

    // 5) Convert to BatchRequestResponse (same logic as your original)
    if (retCode < 300) {
      if (httpResponseMap == null || httpResponseMap.isEmpty()) {
        // Empty response on successful scenario
        batchRequestResponse.setStatus(HostRoleStatus.COMPLETED.toString());
        return batchRequestResponse;
      }

      Map requestMap = null;
      Object requestMapObject = httpResponseMap.get("Requests");
      if (requestMapObject instanceof Map) {
        requestMap = (Map) requestMapObject;
      }

      if (requestMap != null) {
        // requestId
        Object idObj = requestMap.get(REQUESTS_ID_KEY);
        if (idObj instanceof Double) {
          batchRequestResponse.setRequestId(((Double) idObj).longValue());
        } else if (idObj instanceof Number) {
          batchRequestResponse.setRequestId(((Number) idObj).longValue());
        } else if (idObj != null) {
          try {
            batchRequestResponse.setRequestId(Long.parseLong(idObj.toString()));
          } catch (Exception ignore) {
          }
        }

        // status: request_status or status
        String status = null;
        Object statusObj = requestMap.get(REQUESTS_STATUS_KEY);
        if (statusObj != null) {
          status = statusObj.toString();
        }
        Object status2Obj = requestMap.get("status");
        if (status2Obj != null) {
          status = status2Obj.toString();
        }

        // aborted/failed/timedout/total task counts
        Object abortedObj = requestMap.get(REQUESTS_ABORTED_TASKS_KEY);
        if (abortedObj instanceof Double) {
          batchRequestResponse.setAbortedTaskCount(((Double) abortedObj).intValue());
        } else if (abortedObj instanceof Number) {
          batchRequestResponse.setAbortedTaskCount(((Number) abortedObj).intValue());
        }

        Object failedObj = requestMap.get(REQUESTS_FAILED_TASKS_KEY);
        if (failedObj instanceof Double) {
          batchRequestResponse.setFailedTaskCount(((Double) failedObj).intValue());
        } else if (failedObj instanceof Number) {
          batchRequestResponse.setFailedTaskCount(((Number) failedObj).intValue());
        }

        Object timedoutObj = requestMap.get(REQUESTS_TIMEDOUT_TASKS_KEY);
        if (timedoutObj instanceof Double) {
          batchRequestResponse.setTimedOutTaskCount(((Double) timedoutObj).intValue());
        } else if (timedoutObj instanceof Number) {
          batchRequestResponse.setTimedOutTaskCount(((Number) timedoutObj).intValue());
        }

        Object totalObj = requestMap.get(REQUESTS_TOTAL_TASKS_KEY);
        if (totalObj instanceof Double) {
          batchRequestResponse.setTotalTaskCount(((Double) totalObj).intValue());
        } else if (totalObj instanceof Number) {
          batchRequestResponse.setTotalTaskCount(((Number) totalObj).intValue());
        }

        batchRequestResponse.setStatus(status);
      } else {
        // Success but no "Requests" block
        batchRequestResponse.setStatus(HostRoleStatus.COMPLETED.toString());
      }

    } else {
      // Unsuccessful response
      Object msg = (httpResponseMap != null) ? httpResponseMap.get("message") : null;
      String msgStr = (msg != null) ? msg.toString() : responseString;

      batchRequestResponse.setReturnMessage(msgStr);
      batchRequestResponse.setStatus(HostRoleStatus.FAILED.toString());
    }

    return batchRequestResponse;
  }
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这个修复的核心点

  • Response.readEntity(String.class) 才是 Jersey 2.x 读取 body 的正确姿势
  • 加上 null 保护 + try/catch，避免“读 body 失败”把 scheduler 整条链打断
  • JSON 解析失败时兜底记录原文，避免二次异常

# 四、构建与替换：最短路径落地到生产

# 1、编译命令（跳过 RAT / Checkstyle）

mvn -DskipTests -Drat.skip=true -Dcheckstyle.skip=true package
1

编译注意

如果本地环境有 checkstyle / rat 之类的强校验，直接跳过能节省大量时间；等修复验证通过再回头补规范更高效。

# 2、替换 ambari-server 产物到 /usr/lib/ambari-server

编译完成后，将生成的 ambari-server 相关 jar 替换到目标机器：

image-20260217230006961

替换建议（生产习惯）

  • 先备份：cp -a xxx.jar xxx.jar.bak.$(date +%F_%T)
  • 替换后重启 ambari-server 再验证
  • 验证通过后再清理备份，避免回滚成本升高

# 五、验证结果：重试后滚动执行恢复正常

替换完成后重试，滚动更新成功：

image-20260217225907686

日志侧也能看到行为恢复：

image-20260217230244500

验证清单（建议照着勾）

  • 1）触发滚动重启后，是否会持续推进到下一台 host
  • 2）ExecutionScheduler_Worker-* 是否还出现 ClassCastException
  • 3）LinearExecutionJobs.BatchRequestJob-* 是否还出现 “Exiting linear chain...”
  • 4）若开启 debug，确认能打印 Ambari API raw response（便于未来排障）
#错误排查#Ambari
[22213]Ambari 3.0.0 滚动重启只执行一台主机修复
[22212]Ambari 3.0.0 左侧服务菜单滚动条缺失修复

← [22212]Ambari 3.0.0 左侧服务菜单滚动条缺失修复→

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