Viewing Flink Job Details

Viewing Basic Information

In the navigation pane of the DLI console, choose Job Management > Flink Jobs. The Flink Jobs page displays all Flink jobs. You can check basic information about any Flink jobs in the list.

Viewing Details

This section describes how to view job details. After you create and save a job, you can click the job name to view job details, including SQL statements and parameter settings. For a Jar job, you can only view its parameter settings.

1. In the left navigation pane of the DLI management console, choose Job Management > Flink Jobs. The Flink Jobs page is displayed.
2. Click the name of the job to be viewed. The Job Detail tab is displayed.

   In the Job Details tab, you can view SQL statements, configured parameters, and total cost for the job.

   The following uses a Flink SQL job as an example.

   Table 3 Parameter descriptions

   Parameter	Description
   Type	Job type, for example, Flink SQL
   Name	Flink job name
   Description	Description of a Flink job
   Status	Running status of a job
   Running Mode	The dedicated resource mode is used by default.
   Flink Version	Version of Flink selected for the job.
   Queue	Name of the queue where the Flink job runs
   UDF Jar	This parameter is displayed when UDF Jar is set.
   Runtime Configuration	Displayed when a user-defined parameter is added to a job
   CUs	Number of CUs configured for a job
   Job Manager CUs	Number of job manager CUs configured for a job.
   Parallelism	Number of jobs that can be concurrently executed by a Flink job
   CU(s) per TM	Number of CUs occupied by each Task Manager configured for a job
   Slot(s) per TM	Number of Task Manager slots configured for a job
   OBS Bucket	OBS bucket name. After Enable Checkpointing and Save Job Log are enabled, checkpoints and job logs are saved in this bucket.
   Save Job Log	Whether the job running logs are saved to OBS
   Alarm on Job Exception	Whether job exceptions are reported
   SMN Topic	Name of the SMN topic. This parameter is displayed when Alarm Generation upon Job Exception is enabled.
   Auto Restart upon Exception	Whether automatic restart is enabled.
   Max. Retry Attempts	Maximum number of retry times upon an exception. Unlimited means the number is not limited.
   Restore Job from Checkpoint	Whether the job can be restored from a checkpoint
   ID	Job ID
   Savepoint	OBS path of the savepoint
   Enable Checkpointing	Whether checkpointing is enabled
   Checkpoint Interval	Interval between storing intermediate job running results to OBS. The unit is second.
   Checkpoint Mode	Checkpoint mode. Available values are as follows: At least once: Events are processed at least once. Exactly once: Events are processed only once.
   Idle State Retention Time	Clears intermediate states of operators such as GroupBy, RegularJoin, Rank, and Depulicate that have not been updated after the maximum retention time. The default value is 1 hour.
   Dirty Data Policy	Policy for processing dirty data. The value is displayed only when there is a dirty data policy. Available values are as follows: Ignore Trigger a job exception Save
   Dirty Data Dump Address	OBS path for storing dirty data when Dirty Data Policy is set to Save.
   Created	Time when a job is created
   Updated	Time when a job was last updated

Viewing Monitoring Information

You can use Cloud Eye to view details about job data input and output.

1. In the left navigation pane of the DLI management console, choose Job Management > Flink Jobs. The Flink Jobs page is displayed.
2. Click the name of the job you want. The job details are displayed.
   Click Job Monitoring in the upper right corner of the page to switch to the Cloud Eye console.

   Figure 1 Monitoring a Job
   

   The following table describes monitoring metrics related to Flink jobs.

   Table 4 Monitoring metrics related to Flink jobs

   Name	Description
   Flink Job Data Read Rate	Displays the data input rate of a Flink job for monitoring and debugging. Unit: record/s.
   Flink Job Data Write Rate	Displays the data output rate of a Flink job for monitoring and debugging. Unit: record/s.
   Flink Job Total Data Read	Displays the total number of data inputs of a Flink job for monitoring and debugging. Unit: records
   Flink Job Total Data Write	Displays the total number of output data records of a Flink job for monitoring and debugging. Unit: records
   Flink Job Byte Read Rate	Displays the number of input bytes per second of a Flink job. Unit: byte/s
   Flink Job Byte Write Rate	Displays the number of output bytes per second of a Flink job. Unit: byte/s
   Flink Job Total Read Byte	Displays the total number of input bytes of a Flink job. Unit: byte
   Flink Job Total Write Byte	Displays the total number of output bytes of a Flink job. Unit: byte
   Flink Job CPU Usage	Displays the CPU usage of Flink jobs. Unit: %
   Flink Job Memory Usage	Displays the memory usage of Flink jobs. Unit: %
   Flink Job Max Operator Latency	Displays the maximum operator delay of a Flink job. The unit is ms.
   Flink Job Maximum Operator Backpressure	Displays the maximum operator backpressure value of a Flink job. A larger value indicates severer backpressure. 0: OK 50: low 100: high

Viewing the Task List

You can view details about each task running on a job, including the task start time, number of received and transmitted bytes, and running duration.

If the value is 0, no data is received from the data source.

1. In the left navigation pane of the DLI management console, choose Job Management > Flink Jobs. The Flink Jobs page is displayed.
2. Click the name of the job you want. The job details are displayed.
3. On Task List and view the node information about the task.
   Figure 2 Task list
   
   View the operator task list. The following table describes the task parameters.

   Table 5 Parameter descriptions

   Parameter	Description
   Name	Name of an operator.
   Duration	Running duration of an operator.
   Max Concurrent Jobs	Number of parallel tasks in an operator.
   Task	Operator tasks are categorized as follows: The digit in red indicates the number of failed tasks. The digit in light gray indicates the number of canceled tasks. The digit in yellow indicates the number of tasks that are being canceled. The digit in green indicates the number of finished tasks. The digit in blue indicates the number of running tasks. The digit in sky blue indicates the number of tasks that are being deployed. The digit in dark gray indicates the number of tasks in a queue.
   Status	Status of an operator task.
   Back Pressure Status	Working load status of an operator. Available options are as follows: OK: indicates that the operator is in normal working load. LOW: indicates that the operator is in slightly high working load. DLI processes data quickly. HIGH: indicates that the operator is in high working load. The data input speed at the source end is slow.
   Delay	Duration from the time when source data starts being processed to the time when data reaches the current operator. The unit is millisecond.
   Sent Records	Number of data records sent by an operator.
   Sent Bytes	Number of bytes sent by an operator.
   Received Bytes	Number of bytes received by an operator.
   Received Records	Number of data records received by an operator.
   Started	Time when an operator starts running.
   Ended	Time when an operator stops running.

Viewing the Execution Plan

You can view the execution plan to understand the operator stream information about the running job.

1. In the left navigation pane of the DLI management console, choose Job Management > Flink Jobs. The Flink Jobs page is displayed.
2. Click the name of the job you want. The job details are displayed.
3. Click the Execution Plan tab to view the operator flow direction.
   Figure 3 Execution plan
   
   Click a node. The corresponding information is displayed on the right of the page.

   • Scroll the mouse wheel to zoom in or out.
   • The stream diagram displays the operator stream information about the running job in real time.