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Bug
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Resolution: Done
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Major
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1.9.0.Final
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None
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False
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None
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False
Bug report
For bug reports, provide this information, please:
What Debezium connector do you use and what version?
debezium-connector-mongodb version 1.9.0.Final
What is the connector configuration?
{
"name": "test-mongodb-connector",
"config": {
"connector.class": "io.debezium.connector.mongodb.MongoDbConnector",
"mongodb.hosts": "mongos.mongo-cluster:27017",
"mongodb.name": "test_mongodb",
"collection.include.list": "public.test_collection",
"tasks.max": "10",
"capture.mode": "oplog"
}
}
What is the captured database version and mode of deployment?
MongoDB v4.2.18, Kubernetes
What behaviour do you expect?
I have MongoDB connector running on single instance of Kafka Connect application. The connector is connected to shared cluster with 3 shards deployed as a replica set. All connector tasks are started successfully.
What behaviour do you see?
Kafka Connect starts 3 connector tasks, 2 of which fail with the error:
java.lang.RuntimeException: Unable to register the MBean 'debezium.mongodb:type=connector-metrics,context=snapshot,server=test_mongodb' at io.debezium.metrics.Metrics.register(Metrics.java:77) at io.debezium.pipeline.ChangeEventSourceCoordinator.lambda$start$0(ChangeEventSourceCoordinator.java:101) at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) at java.base/java.util.concurrent.FutureTask.run(Unknown Source) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.base/java.lang.Thread.run(Unknown Source) Caused by: javax.management.InstanceAlreadyExistsException: debezium.mongodb:type=connector-metrics,context=snapshot,server=test_mongodb at java.management/com.sun.jmx.mbeanserver.Repository.addMBean(Unknown Source) at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(Unknown Source) at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(Unknown Source) at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(Unknown Source) at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(Unknown Source) at java.management/com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(Unknown Source) at io.debezium.metrics.Metrics.register(Metrics.java:73) ... 6 more
Do you see the same behaviour using the latest released Debezium version?
Yes
Implementation ideas (optional)
I suggest adding MongoDB task id (value of "mongodb.task.id" connector property) to MBean name like it is done by Kafka Connect:
kafka.connect:type=source-task-metrics,connector=([-.\w]+),task=([\d]+)
