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  1. Debezium
  2. DBZ-2228

Intermittent test failure -- Multiple admin clients with same id

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      See https://api.travis-ci.org/v3/job/699606922/log.txt:

      javax.management.InstanceAlreadyExistsException: kafka.admin.client:type=app-info,id=my-db-history
      at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:437)
      at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1898)
      at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:966)
      at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:900)
      at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:324)
      at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)
      at org.apache.kafka.common.utils.AppInfoParser.registerAppInfo(AppInfoParser.java:64)
      at org.apache.kafka.clients.admin.KafkaAdminClient.<init>(KafkaAdminClient.java:529)
      at org.apache.kafka.clients.admin.KafkaAdminClient.createInternal(KafkaAdminClient.java:472)
      at org.apache.kafka.clients.admin.Admin.create(Admin.java:61)
      at org.apache.kafka.clients.admin.AdminClient.create(AdminClient.java:39)
      at io.debezium.relational.history.KafkaDatabaseHistory.initializeStorage(KafkaDatabaseHistory.java:484)
      at io.debezium.relational.history.KafkaDatabaseHistoryTest.differentiateStorageExistsFromHistoryExists(KafkaDatabaseHistoryTest.java:334)

      I suppose the problem is the async usage of an admin client in KafkaDatabaseHistory#checkTopicSettings(). It's not 100% to me how this could happen as that executor should be shut down after each test method. But in any case it seems the saver approach to use a distinct name (client id), avoiding the conflict.

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            gmorling@redhat.com Gunnar Morling
            gmorling@redhat.com Gunnar Morling
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