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    E-MapReduce:TriggerCondition

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    E-MapReduce:TriggerCondition

    Last Updated:Oct 09, 2026

    Parameter

    Type

    Description

    Example

    object

    The trigger condition.

    MetricName

    string

    The metric name. This parameter is required and cannot be an empty character string. You can view metric names in Add elastic scaling rules.

    yarn_resourcemanager_queue_PendingVCores
    ComparisonOperator

    string

    The comparison operator. This parameter is required. Valid values:

    • EQ: equal to.

    • NE: not equal to.

    • GT: greater than.

    • LT: less than.

    • GE: greater than or equal to.

    • LE: less than or equal to.

    LT
    Statistics

    string

    The statistic name. This parameter is required. Valid values:

    • MAX: maximum value.

    • MIN: minimum value.

    • AVG: average value.

    AVG
    Tags

    array

    The list of metric partition tags.

    For metrics with queue

    Default value:

    Tag key: queue_name. Value: root.

    When you use metrics with a queue, you can set the queue_name tag to specify the queue. Ensure that you enter the full queue hierarchy name.

    Example

    Metric name: yarn_resourcemanager_queue_AvailableVCoresPercentage

    Tag: queue_name: root.default.a

    For metrics with partition

    Default value: Tag key: none. Value: none.

    Note

    For metrics with a partition, you must set the partition_name tag and explicitly specify the partition name.

    Example

    Metric name: yarn_cluster_availMemoryMBByPartition

    Tag: partition_name: DEFAULT_PARTITION

    Tag

    The tag.

    Threshold

    number

    The trigger threshold. This parameter is required.

    12.5