Flink CDC (session模式)

1、

# Start YARN session
./bin/yarn-session.sh --detached

2、配置文件：

rest.bind-port: {{REST_PORT}}
rest.address: {{NODE_IP}}
execution.target: yarn-session
yarn.application.id: {{YARN_APPLICATION_ID}}

3、mysql-doris.yml

source:
 type: mysql
 hostname: localhost
 port: 3306
 username: root
 password: 123456
 tables: app_db.\.*
 server-id: 5400-5404
 server-time-zone: UTC
 
sink:
 type: doris
 fenodes: 127.0.0.1:8030
 username: root
 password: ""
 
pipeline:
 name: Sync MySQL Database to Doris
 parallelism: 2

4、运行测试：

./bin/flink-cdc.sh mysql-to-doris.yaml

5、相关问题：

1、Caused by: java.lang.ClassCastException: cannot assign instance of com.starrocks.connector.flink.catalog.StarRocksCatalog to field org.apache.flink.cdc.connectors.starrocks.sink.StarRocksMetadataApplier.catalog of type com.starrocks.connector.flink.catalog.StarRocksCatalog in instance of org.apache.flink.cdc.connectors.starrocks.sink.StarRocksMetadataApplier

解决方案：

classloader.resolve-order: parent-first

2、

Caused by: org.apache.flink.runtime.JobException: Cannot instantiate the coordinator for operator Source: Flink CDC Event Source: mysql -> SchemaOperator -> PrePartition
        at org.apache.flink.runtime.executiongraph.ExecutionJobVertex.initialize(ExecutionJobVertex.java:229)
        at org.apache.flink.runtime.executiongraph.DefaultExecutionGraph.initializeJobVertex(DefaultExecutionGraph.java:914)
        at org.apache.flink.runtime.executiongraph.ExecutionGraph.initializeJobVertex(ExecutionGraph.java:218)
        at org.apache.flink.runtime.executiongraph.DefaultExecutionGraph.initializeJobVertices(DefaultExecutionGraph.java:896)
        at org.apache.flink.runtime.executiongraph.DefaultExecutionGraph.attachJobGraph(DefaultExecutionGraph.java:852)
        at org.apache.flink.runtime.executiongraph.DefaultExecutionGraphBuilder.buildGraph(DefaultExecutionGraphBuilder.java:207)
        at org.apache.flink.runtime.scheduler.DefaultExecutionGraphFactory.createAndRestoreExecutionGraph(DefaultExecutionGraphFactory.java:163)
        at org.apache.flink.runtime.scheduler.SchedulerBase.createAndRestoreExecutionGraph(SchedulerBase.java:365)
        at org.apache.flink.runtime.scheduler.SchedulerBase.<init>(SchedulerBase.java:210)
        at org.apache.flink.runtime.scheduler.DefaultScheduler.<init>(DefaultScheduler.java:136)
        at org.apache.flink.runtime.scheduler.DefaultSchedulerFactory.createInstance(DefaultSchedulerFactory.java:152)
        at org.apache.flink.runtime.jobmaster.DefaultSlotPoolServiceSchedulerFactory.createScheduler(DefaultSlotPoolServiceSchedulerFactory.java:119)
        at org.apache.flink.runtime.jobmaster.JobMaster.createScheduler(JobMaster.java:371)
        at org.apache.flink.runtime.jobmaster.JobMaster.<init>(JobMaster.java:348)
        at org.apache.flink.runtime.jobmaster.factories.DefaultJobMasterServiceFactory.internalCreateJobMasterService(DefaultJobMasterServiceFactory.java:123)
        at org.apache.flink.runtime.jobmaster.factories.DefaultJobMasterServiceFactory.lambda$createJobMasterService$0(DefaultJobMasterServiceFactory.java:95)
        at org.apache.flink.util.function.FunctionUtils.lambda$uncheckedSupplier$4(FunctionUtils.java:112)
        ... 4 more
Caused by: java.lang.NoClassDefFoundError: org/apache/flink/cdc/runtime/typeutils/EventTypeInfo
        at java.lang.Class.getDeclaredFields0(Native Method)
        at java.lang.Class.privateGetDeclaredFields(Class.java:2583)

解决方案：

cp /BigData/run/flink-cdc/lib/flink-cdc-dist-3.1.0.jar /BigData/run/flink/lib/

3、问题3

Caused by: org.apache.flink.table.api.ValidationException: The MySQL server has a timezone offset (28800 seconds ahead of UTC) which does not match the configured timezone UTC. Specify the right server-time-zone to avoid inconsistencies for time-related fields.

解决方案1：

jdbc:mysql://hostname:port/database?serverTimezone=UTC
解决方案2:

SET table.local-time-zone = 'Asia/Shanghai';  -- 或者你所需的时区

解决方案3:

CREATE TABLE my_table (
  ...
) WITH (
  'connector' = 'mysql-cdc',
  'hostname' = 'localhost',
  'port' = '3306',
  ...
  'server-time-zone' = 'Asia/Shanghai'  -- 或者你所需的时区
);