Developing a Real-Time Processing Single-Task MRS Flink Jar Job

Flink Job Name

Yes

Enter the Flink job name.

The name is automatically generated in Workspace-Job name format.

The job name can contain 1 to 64 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed. Chinese characters are not allowed.

MRS Cluster

Yes

Select an MRS cluster.

Program Parameter

No

Set job running parameters. This parameter is displayed only after an MRS cluster is selected.

(Optional) Configure optimization parameters such as threads, memory, and vCPUs for the job to optimize resource usage and improve job execution performance.

Click Select Template and select a parameter template. You can also select multiple templates. For details on how to create data connections, see Configuring a Template.

For details about the program parameters of MRS Spark jobs, see Running a Flink Job in the MapReduce Service User Guide.

Job Execution Parameter

No

Set the parameters for the Flink job.

Variables required for executing the Flink job. These variables are specified by the functions in the Hive script. Multiple parameters are separated by spaces.

MRS Resource Queue

No

Select a created MRS resource queue.

Select a queue you configured in the queue permissions of DataArts Security. If you set multiple resource queues for this node, the resource queue you select here has the highest priority.

Flink job resource package

Yes

Select a JAR package. Before selecting a JAR package, upload the JAR package to the OBS bucket, create a resource on the Manage Resource page, and add the JAR package to the resource management list. For details, see Creating a Resource.

Rerun Policy

No

• Rerun from the previous checkpoint
• Rerun the job

Input Data Path

No

Set the input data path. You can select an HDFS or OBS path.

Output Data Path

No

Set the output data path. You can select an HDFS or OBS path.

Job Status Polling Interval (s)

Yes

Set the interval at which the system checks whether the job is complete. The interval can range from 30s to 60s, or 120s, 180s, 240s, or 300s.

During job execution, the system checks the job status at the configured interval.

Maximum Wait Time

Yes

Set the timeout interval for the job. If the job is not complete within the timeout interval and retry is enabled, the job will be executed again.

Retry upon Failure

No

Whether to re-execute a node if it fails to be executed.

• Yes: The node task will be re-executed, and the following parameters must be configured:
  • Retry upon Timeout
  • Maximum Retries
  • Retry Interval (seconds)
• No: The node will not be re-executed. This is the default setting.

Owner

An owner configured during job creation is automatically matched. This parameter value can be modified.

Job Agency

This parameter is available when Scheduling Identities is set to Yes.

After an agency is configured, the job interacts with other services as an agency during job execution.

Priority

Priority configured during job creation is automatically matched. This parameter value can be modified.

Execution Timeout

Timeout of the job instance. If this parameter is set to 0 or is not set, this parameter does not take effect. If the notification function is enabled for the job and the execution time of the job instance exceeds the preset value, the system sends a specified notification, and the job keeps running.

Exclude Waiting Time from Instance Timeout Duration

Whether to exclude the wait time from the instance execution timeout duration

If you select this option, the time to wait before an instance starts running is excluded from the timeout duration. You can modify this setting on the Default Configuration page.

If you do not select this option, the time to wait before an instance starts running is included in the timeout duration.

Custom Parameter

Set the name and value of the parameter.

Job Tag

Configure job tags to manage jobs by category.

Click Add to add a tag to the job. You can also select a tag configured in Managing Job Tags.

Variables

Add

Click Add and enter the variable parameter name and parameter value in the text boxes.

• Parameter name

  Only letters, digits, hyphens (-), and underscores (_) are allowed.

• Parameter value
  • The string type of parameter value is a character string, for example, str1.
  • The numeric type of parameter value is a number or operation expression.

After the parameter is configured, it is referenced in the format of ${parameter name} in the job.

Edit Parameter Expression

Click next to the parameter value text box. In the displayed dialog box, edit the parameter expression. For more expressions, see Expression Overview.

Modify

Change the parameter name or value in the corresponding text boxes.

Mask

If the parameter value is a key, click to mask the value for security purposes.

Delete

Click next to the parameter name and value text boxes to delete the job parameter.

Constant Parameter

Add

Click Add and enter the constant parameter name and parameter value in the text boxes.

• Parameter name

  Only letters, digits, hyphens (-), and underscores (_) are allowed.

• Parameter value
  • The string type of parameter value is a character string, for example, str1.
  • The numeric type of parameter value is a number or operation expression.

After the parameter is configured, it is referenced in the format of ${parameter name} in the job.

Edit Parameter Expression

Click next to the parameter value text box. In the displayed dialog box, edit the parameter expression. For more expressions, see Expression Overview.

Modify

Modify the parameter name and parameter value in text boxes and save the modifications.

Delete

Click next to the parameter name and value text boxes to delete the job parameter.

Workspace Environment Variables

View the variables and constants that have been configured in the workspace.

Current Time

This parameter is displayed only when Scheduling Type is set to Run once. The default value is the current time.

Event Triggering Time

This parameter is displayed only when Scheduling Type is set to Event-based. The default value is the time when an event is triggered.

Scheduling Period

This parameter is displayed only when Scheduling Type is set to Run periodically. The default value is the scheduling period.

Start Time

This parameter is displayed only when Scheduling Type is set to Run periodically. The value is the configured job execution time.

Start Time

This parameter is displayed only when Scheduling Type is set to Run periodically. The value is the time when the periodic job scheduling starts.

Subsequent Instances

Number of job instances scheduled.

• The default value is 1 when Scheduling Type is set to Run once.
• The default value is 1 when Scheduling Type is set to Event-based.
• When Scheduling Type is set to Run periodically:

  If the number of instances exceeds 10, a maximum of 10 instances can be displayed, and the system displays message "A maximum of 10 instances are supported."