Creating a Flink Jar job

Function

This API is used to create custom jobs, which currently support the JAR format and run in dedicated queues.

URI

URI format
POST /v1.0/{project_id}/streaming/flink-jobs

Parameter description

**Table 1** URI parameter
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID, which is used for resource isolation. For details about how to obtain its value, see Obtaining a Project ID.

Request

**Table 2** Parameter description
Parameter	Mandatory	Type	Description
name	Yes	String	Name of the job. The value can contain 1 to 57 characters.
desc	No	String	Job description. Length range: 0 to 512 characters.
queue_name	No	String	Name of a queue. The value can contain 0 to 128 characters.
cu_number	No	Integer	Number of CUs selected for a job.
manager_cu_number	No	Integer	Number of CUs on the management node selected by the user for a job, which corresponds to the number of Flink job managers. The default value is 1.
parallel_number	No	Integer	Number of parallel operations selected for a job.
log_enabled	No	Boolean	Whether to enable the job log function. true: indicates to enable the job log function. false: indicates to disable the job log function. Default value: false
obs_bucket	No	String	OBS bucket where users are authorized to save logs when log_enabled is set to true.
smn_topic	No	String	SMN topic. If a job fails, the system will send a message to users subscribed to the SMN topic.
main_class	No	String	Job entry class.
entrypoint_args	No	String	Job entry parameter. Multiple parameters are separated by spaces.
restart_when_exception	No	Boolean	Whether to enable the function of restart upon exceptions. The default value is false.
entrypoint	No	String	Name of the package that has been uploaded to the DLI resource management system. This parameter is used to customize the JAR file where the job main class is located.
dependency_jars	No	Array of Strings	Name of the package that has been uploaded to the DLI resource management system. This parameter is used to customize other dependency packages. Example: myGroup/test.jar,myGroup/test1.jar.
dependency_files	No	Array of Strings	Name of the resource package that has been uploaded to the DLI resource management system. This parameter is used to customize dependency files. Example: myGroup/test.cvs,myGroup/test1.csv. You can add the following content to the application to access the corresponding dependency file: In the command, fileName indicates the name of the file to be accessed, and ClassName indicates the name of the class that needs to access the file. ClassName.class.getClassLoader().getResource("userData/fileName")
tm_cus	No	Integer	Number of CUs for each TaskManager. The default value is 1.
tm_slot_num	No	Integer	Number of slots in each TaskManager. The default value is *(parallel_numbertm_cus)/(cu_number-manager_cu_number)**.
feature	No	String	Job feature. Type of the Flink image used by a job. basic: indicates that the basic Flink image provided by DLI is used. custom: indicates that the user-defined Flink image is used.
flink_version	No	String	Flink version. This parameter is valid only when feature is set to basic. You can use this parameter with the feature parameter to specify the version of the DLI basic Flink image used for job running.
image	No	String	Custom image. The format is Organization name/Image name:Image version. This parameter is valid only when feature is set to custom. You can use this parameter with the feature parameter to specify a user-defined Flink image for job running. For details about how to use custom images, see Data Lake Insight User Guide.
resume_checkpoint	No	Boolean	Whether the abnormal restart is recovered from the checkpoint.
resume_max_num	No	Integer	Maximum number of retry times upon exceptions. The unit is times/hour. Value range: -1 or greater than 0. The default value is -1, indicating that the number of times is unlimited.
checkpoint_path	No	String	Storage address of the checkpoint in the JAR file of the user. The path must be unique.
tags	No	Array of Objects	Label of a Flink JAR job. For details, see Table 3.
runtime_config	No	String	Customizes optimization parameters when a Flink job is running.

**Table 3** tags parameter
Parameter	Mandatory	Type	Description
key	Yes	String	Tag key. NOTE: A tag key can contain a maximum of 128 characters. Only letters, digits, spaces, and special characters (_.:=+-@) are allowed, but the value cannot start or end with a space or start with _sys_.
value	Yes	String	Tag key. NOTE: A tag value can contain a maximum of 255 characters. Only letters, digits, spaces, and special characters (_.:=+-@) are allowed. The value cannot start or end with a space.

Response

**Table 4** Response parameters
Parameter	Mandatory	Type	Description
is_success	No	Boolean	Indicates whether the request is successfully executed. Value true indicates that the request is successfully executed.
message	No	String	Message content.
job	No	Object	Information about the job status. For details, see Table 5.

**Table 5** **job** parameters
Parameter	Mandatory	Type	Description
job_id	Yes	Long	Job ID.
status_name	No	String	Name of job status.
status_desc	No	String	Status description. Causes and suggestions for the abnormal status.

Example Request

Create a Flink Jar job named test, set the job to be executed on testQueue, set the number of CUs used by the job, and enable the job log function.

{
    "name": "test",
    "desc": "job for test",
    "queue_name": "testQueue",
    "manager_cu_number": 1,
    "cu_number": 2,
    "parallel_number": 1,
    "tm_cus": 1,
    "tm_slot_num": 1,
    "log_enabled": true,
    "obs_bucket": "bucketName",
    "smn_topic": "topic",
    "main_class": "org.apache.flink.examples.streaming.JavaQueueStream",
    "restart_when_exception": false,
    "entrypoint": "javaQueueStream.jar",
    "entrypoint_args":"-windowSize 2000 -rate 3",
    "dependency_jars": [
        "myGroup/test.jar",
        "myGroup/test1.jar"
    ],
    "dependency_files": [
        "myGroup/test.csv",
        "myGroup/test1.csv"
    ]
}

Example Response

{
  "is_success": true,
  "message": "A Flink job is created successfully.",
  "job": {
    "job_id": 138,
    "status_name": "job_init",
    "status_desc": ""
  }
}

Status Codes

Table 6 describes status codes.

**Table 6** Status codes
Status Code	Description
200	The custom Flink job is created successfully.
400	The input parameter is invalid.

Error Codes

If an error occurs when this API is invoked, the system does not return the result similar to the preceding example, but returns the error code and error information. For details, see Error Codes.

Parent topic: Flink Job-related APIs

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