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      Centro de ayuda/ MapReduce Service/ Guía del usuario/ Referencia de alarma (aplicable a MRS 3.x)/ ALM-45639 Checkpointing of a Flink Job Times Out

      ALM-45639 Checkpointing of a Flink Job Times Out

      Actualización más reciente 2023-11-20 GMT+08:00
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      Description

      The system checks the checkpointing timeout of Flink jobs every 30 seconds. This alarm is generated if the checkpointing timeout of a Flink job is longer than the threshold (600 seconds by default). This alarm is cleared when the checkpointing timeout of a job is less than or equal to the threshold.

      Attribute

      Alarm ID

      Alarm Severity

      Auto Clear

      45639

      Minor

      Yes

      Parameters

      Name

      Meaning

      Source

      Specifies the cluster for which the alarm is generated.

      ServiceName

      Specifies the service for which the alarm is generated.

      JobName

      Specifies the job for which the alarm is generated.

      UserName

      Specifies the username for which the alarm is generated.

      Impact on the System

      This alarm has no impact on the system.

      Possible Causes

      The job may be in the sub-healthy state. The possible causes are as follows:

      • The memory for the TaskManager of the job is insufficient.
      • The state memory is too large, making checkpointing time-consuming.

      Procedure

      1. Log in to Manager as a user who has the FlinkServer management permission.
      2. Choose O&M > Alarm > Alarms > ALM-45639 Checkpointing of a Flink Job Times Out, view Location, and obtain the name of the task for which the alarm is generated.
      3. Choose Cluster > Services > Yarn and click the link next to ResourceManager WebUI to go to the native Yarn page.
      4. Locate the failed task based on its name displayed in Location, search for and record the application ID of the job, and check whether the job logs are available on the Yarn page.

        Figura 1 Application ID of a job
        • If yes, go to 5.
        • If no, go to 7.

      5. Click the application ID of the failed job to go to the job page.

        1. Click Logs in the Logs column to view JobManager logs.
          Figura 2 Clicking Logs
        2. Click the ID in the Attempt ID column and click Logs in the Logs column to view TaskManager logs.
          Figura 3 Clicking the ID in the Attempt ID column
          Figura 4 Clicking Logs
          NOTA:

          You can also log in to Manager as a user who has the FlinkServer management permission. Choose Cluster > Services > Flink, and click the link next to Flink WebUI. On the displayed Flink web UI, click Job Management, click More in the Operation column, and select Job Monitoring to view TaskManager logs.

      6. View the logs of the failed job to rectify the fault, or contact the and send the collected fault logs. No further action is required.

      If logs are unavailable on the Yarn page, download logs from HDFS.

      1. On Manager, choose Cluster > Services > HDFS, click the link next to NameNode WebUI to go to the HDFS page, choose Utilities > Browse the file system, and download logs in the /tmp/logs/Username/logs/Application ID of the failed job directory.
      2. View the logs of the failed job to rectify the fault, or contact the and send the collected fault logs.

      Alarm Clearing

      This alarm is cleared when the checkpointing timeout a Flink job is less than or equal to the threshold.

      Related Information

      None

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