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https://issues.apache.org/jira/browse/FLINK-36787?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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zhengyuan closed FLINK-36787.
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Resolution: Not A Problem
> In Flink SQL stream mode, joining a Kafka source with a JDBC dimension table
> caused a Yarn node to run out of memory (OOM).
> ---------------------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-36787
> URL: https://issues.apache.org/jira/browse/FLINK-36787
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Runtime
> Affects Versions: 1.17.2
> Environment: Flink 1.17.2
> hadoop 3.2.3
> jdk:1.8
> Reporter: zhengyuan
> Priority: Critical
> Attachments: flink-join-oom.log
>
>
> In Flink SQL stream mode, I used a Kafka source to join with a JDBC dimension
> table. When the join node processed over 10 million records, the task was
> repeatedly re-initialized until an OutOfMemoryError (OOM) occurred. After
> changing the join type to a Temporal Join, the task node's garbage collection
> (GC) behavior normalized.
>
> inner join :
> CREATE TEMPORARY VIEW transform_tableJoin_effq515l0_ AS select
> `time`,`value`,`id`,`eng_name`, PROCTIME() as proc_time from ( SELECT
> source_kafka_rpPDIjxy5x.`time` AS `time`,source_kafka_rpPDIjxy5x.`value` AS
> `value`,source_kafka_rpPDIjxy5x.`id` AS
> `id`,source_meta_9rzxhLIL4w.`eng_name` AS `eng_name` FROM
> source_kafka_rpPDIjxy5x
> inner join source_meta_9rzxhLIL4w on
> source_kafka_rpPDIjxy5x.id=source_meta_9rzxhLIL4w.attr_id
> ) ;
> changed to Temporal Join,:
> CREATETEMPORARYVIEW transform_tableJoin_effq515l0_ AS
> select `time`,`value`,`id`,`attr_eng_name`, instance_eng_name, PROCTIME() as
> proc_time
> from (
> SELECT source_kafka_rpPDIjxy5x.`time` AS `time`,
> source_kafka_rpPDIjxy5x.`value` AS `value`,
> source_kafka_rpPDIjxy5x.`id` AS `id`,
> v_meta_attr_processing.`attr_eng_name` AS `attr_eng_name`,
> v_meta_attr_processing.instance_eng_name as instance_eng_name
> FROM source_kafka_rpPDIjxy5x
> inner join v_meta_attr_processing
> FOR SYSTEM_TIME AS OF source_kafka_rpPDIjxy5x.auto_row_time
> on source_kafka_rpPDIjxy5x.id=v_meta_attr_processing.attr_id
> ) ;
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