[ 
https://issues.apache.org/jira/browse/KAFKA-9013?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17278264#comment-17278264
 ] 

Matthias J. Sax commented on KAFKA-9013:
----------------------------------------

Failed again with
{quote}{{java.lang.AssertionError: Connector MirrorCheckpointConnector tasks 
did not start in time on cluster: 
org.apache.kafka.connect.util.clusters.EmbeddedConnectCluster@6b7300f1
        at 
org.apache.kafka.connect.util.clusters.EmbeddedConnectClusterAssertions.assertConnectorAndAtLeastNumTasksAreRunning(EmbeddedConnectClusterAssertions.java:296)
        at 
org.apache.kafka.connect.mirror.integration.MirrorConnectorsIntegrationBaseTest.waitUntilMirrorMakerIsRunning(MirrorConnectorsIntegrationBaseTest.java:458)
        at 
org.apache.kafka.connect.mirror.integration.MirrorConnectorsIntegrationBaseTest.testReplication(MirrorConnectorsIntegrationBaseTest.java:225)}}

[...]

{{Caused by: org.opentest4j.AssertionFailedError: Condition not met within 
timeout 30000. The connector or at least 1 of tasks are not running. ==> 
expected: <true> but was: <false>
        at org.junit.jupiter.api.AssertionUtils.fail(AssertionUtils.java:55)
        at org.junit.jupiter.api.AssertTrue.assertTrue(AssertTrue.java:40)
        at org.junit.jupiter.api.Assertions.assertTrue(Assertions.java:193)
        at 
org.apache.kafka.test.TestUtils.lambda$waitForCondition$3(TestUtils.java:303)
        at 
org.apache.kafka.test.TestUtils.retryOnExceptionWithTimeout(TestUtils.java:351)
        at 
org.apache.kafka.test.TestUtils.retryOnExceptionWithTimeout(TestUtils.java:319)
        at org.apache.kafka.test.TestUtils.waitForCondition(TestUtils.java:300)
        at org.apache.kafka.test.TestUtils.waitForCondition(TestUtils.java:290)
        at 
org.apache.kafka.connect.util.clusters.EmbeddedConnectClusterAssertions.assertConnectorAndAtLeastNumTasksAreRunning(EmbeddedConnectClusterAssertions.java:285)}}{quote}
 
STDOUT
{quote} {{[2021-02-03 00ː35ː25,166] ERROR Could not check connector state info. 
(org.apache.kafka.connect.util.clusters.EmbeddedConnectClusterAssertions:420)
org.apache.kafka.connect.runtime.rest.errors.ConnectRestException: Could not 
read connector state. Error response: \{"error_code":404,"message":"No status 
found for connector MirrorSourceConnector"}
        at 
org.apache.kafka.connect.util.clusters.EmbeddedConnectCluster.connectorStatus(EmbeddedConnectCluster.java:466)
        at 
org.apache.kafka.connect.util.clusters.EmbeddedConnectClusterAssertions.checkConnectorState(EmbeddedConnectClusterAssertions.java:413)
        at 
org.apache.kafka.connect.util.clusters.EmbeddedConnectClusterAssertions.lambda$assertConnectorAndAtLeastNumTasksAreRunning$16(EmbeddedConnectClusterAssertions.java:286)
        at 
org.apache.kafka.test.TestUtils.lambda$waitForCondition$3(TestUtils.java:303)
        at 
org.apache.kafka.test.TestUtils.retryOnExceptionWithTimeout(TestUtils.java:351)
        at 
org.apache.kafka.test.TestUtils.retryOnExceptionWithTimeout(TestUtils.java:319)
        at org.apache.kafka.test.TestUtils.waitForCondition(TestUtils.java:300)
        at org.apache.kafka.test.TestUtils.waitForCondition(TestUtils.java:290)
        at 
org.apache.kafka.connect.util.clusters.EmbeddedConnectClusterAssertions.assertConnectorAndAtLeastNumTasksAreRunning(EmbeddedConnectClusterAssertions.java:285)
        at 
org.apache.kafka.connect.mirror.integration.MirrorConnectorsIntegrationBaseTest.waitUntilMirrorMakerIsRunning(MirrorConnectorsIntegrationBaseTest.java:458)
        at 
org.apache.kafka.connect.mirror.integration.MirrorConnectorsIntegrationBaseTest.testReplication(MirrorConnectorsIntegrationBaseTest.java:225)}}{quote}

> Flaky Test MirrorConnectorsIntegrationTest#testReplication
> ----------------------------------------------------------
>
>                 Key: KAFKA-9013
>                 URL: https://issues.apache.org/jira/browse/KAFKA-9013
>             Project: Kafka
>          Issue Type: Bug
>          Components: KafkaConnect
>            Reporter: Bruno Cadonna
>            Priority: Major
>              Labels: flaky-test
>
> h1. Stacktrace:
> {code:java}
> java.lang.AssertionError: Condition not met within timeout 20000. Offsets not 
> translated downstream to primary cluster.
>       at org.apache.kafka.test.TestUtils.waitForCondition(TestUtils.java:377)
>       at org.apache.kafka.test.TestUtils.waitForCondition(TestUtils.java:354)
>       at 
> org.apache.kafka.connect.mirror.MirrorConnectorsIntegrationTest.testReplication(MirrorConnectorsIntegrationTest.java:239)
> {code}
> h1. Standard Error
> {code}
> Standard Error
> Oct 09, 2019 11:32:00 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource 
> registered in SERVER runtime does not implement any provider interfaces 
> applicable in the SERVER runtime. Due to constraint configuration problems 
> the provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource will 
> be ignored. 
> Oct 09, 2019 11:32:00 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource registered in 
> SERVER runtime does not implement any provider interfaces applicable in the 
> SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource will be 
> ignored. 
> Oct 09, 2019 11:32:00 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource registered 
> in SERVER runtime does not implement any provider interfaces applicable in 
> the SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource will be 
> ignored. 
> Oct 09, 2019 11:32:00 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.RootResource registered in 
> SERVER runtime does not implement any provider interfaces applicable in the 
> SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.RootResource will be ignored. 
> Oct 09, 2019 11:32:01 PM org.glassfish.jersey.internal.Errors logErrors
> WARNING: The following warnings have been detected: WARNING: The 
> (sub)resource method listLoggers in 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource contains 
> empty path annotation.
> WARNING: The (sub)resource method listConnectors in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource contains 
> empty path annotation.
> WARNING: The (sub)resource method createConnector in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource contains 
> empty path annotation.
> WARNING: The (sub)resource method listConnectorPlugins in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource 
> contains empty path annotation.
> WARNING: The (sub)resource method serverInfo in 
> org.apache.kafka.connect.runtime.rest.resources.RootResource contains empty 
> path annotation.
> Oct 09, 2019 11:32:02 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource 
> registered in SERVER runtime does not implement any provider interfaces 
> applicable in the SERVER runtime. Due to constraint configuration problems 
> the provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource will 
> be ignored. 
> Oct 09, 2019 11:32:02 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource registered 
> in SERVER runtime does not implement any provider interfaces applicable in 
> the SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource will be 
> ignored. 
> Oct 09, 2019 11:32:02 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.RootResource registered in 
> SERVER runtime does not implement any provider interfaces applicable in the 
> SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.RootResource will be ignored. 
> Oct 09, 2019 11:32:02 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource registered in 
> SERVER runtime does not implement any provider interfaces applicable in the 
> SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource will be 
> ignored. 
> Oct 09, 2019 11:32:02 PM org.glassfish.jersey.internal.Errors logErrors
> WARNING: The following warnings have been detected: WARNING: The 
> (sub)resource method listLoggers in 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource contains 
> empty path annotation.
> WARNING: The (sub)resource method listConnectors in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource contains 
> empty path annotation.
> WARNING: The (sub)resource method createConnector in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource contains 
> empty path annotation.
> WARNING: The (sub)resource method listConnectorPlugins in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource 
> contains empty path annotation.
> WARNING: The (sub)resource method serverInfo in 
> org.apache.kafka.connect.runtime.rest.resources.RootResource contains empty 
> path annotation.
> Oct 09, 2019 11:32:04 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.RootResource registered in 
> SERVER runtime does not implement any provider interfaces applicable in the 
> SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.RootResource will be ignored. 
> Oct 09, 2019 11:32:04 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource registered in 
> SERVER runtime does not implement any provider interfaces applicable in the 
> SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource will be 
> ignored. 
> Oct 09, 2019 11:32:04 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource 
> registered in SERVER runtime does not implement any provider interfaces 
> applicable in the SERVER runtime. Due to constraint configuration problems 
> the provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource will 
> be ignored. 
> Oct 09, 2019 11:32:04 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource registered 
> in SERVER runtime does not implement any provider interfaces applicable in 
> the SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource will be 
> ignored. 
> Oct 09, 2019 11:32:04 PM org.glassfish.jersey.internal.Errors logErrors
> WARNING: The following warnings have been detected: WARNING: The 
> (sub)resource method listLoggers in 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource contains 
> empty path annotation.
> WARNING: The (sub)resource method listConnectors in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource contains 
> empty path annotation.
> WARNING: The (sub)resource method createConnector in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource contains 
> empty path annotation.
> WARNING: The (sub)resource method listConnectorPlugins in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource 
> contains empty path annotation.
> WARNING: The (sub)resource method serverInfo in 
> org.apache.kafka.connect.runtime.rest.resources.RootResource contains empty 
> path annotation.
> Oct 09, 2019 11:32:06 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource 
> registered in SERVER runtime does not implement any provider interfaces 
> applicable in the SERVER runtime. Due to constraint configuration problems 
> the provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource will 
> be ignored. 
> Oct 09, 2019 11:32:06 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource registered 
> in SERVER runtime does not implement any provider interfaces applicable in 
> the SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource will be 
> ignored. 
> Oct 09, 2019 11:32:06 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource registered in 
> SERVER runtime does not implement any provider interfaces applicable in the 
> SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource will be 
> ignored. 
> Oct 09, 2019 11:32:06 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.RootResource registered in 
> SERVER runtime does not implement any provider interfaces applicable in the 
> SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.RootResource will be ignored. 
> Oct 09, 2019 11:32:06 PM org.glassfish.jersey.internal.Errors logErrors
> WARNING: The following warnings have been detected: WARNING: The 
> (sub)resource method listLoggers in 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource contains 
> empty path annotation.
> WARNING: The (sub)resource method listConnectors in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource contains 
> empty path annotation.
> WARNING: The (sub)resource method createConnector in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource contains 
> empty path annotation.
> WARNING: The (sub)resource method listConnectorPlugins in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource 
> contains empty path annotation.
> WARNING: The (sub)resource method serverInfo in 
> org.apache.kafka.connect.runtime.rest.resources.RootResource contains empty 
> path annotation.
> Oct 09, 2019 11:32:07 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.RootResource registered in 
> SERVER runtime does not implement any provider interfaces applicable in the 
> SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.RootResource will be ignored. 
> Oct 09, 2019 11:32:07 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource registered 
> in SERVER runtime does not implement any provider interfaces applicable in 
> the SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource will be 
> ignored. 
> Oct 09, 2019 11:32:07 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource 
> registered in SERVER runtime does not implement any provider interfaces 
> applicable in the SERVER runtime. Due to constraint configuration problems 
> the provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource will 
> be ignored. 
> Oct 09, 2019 11:32:07 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource registered in 
> SERVER runtime does not implement any provider interfaces applicable in the 
> SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource will be 
> ignored. 
> Oct 09, 2019 11:32:07 PM org.glassfish.jersey.internal.Errors logErrors
> WARNING: The following warnings have been detected: WARNING: The 
> (sub)resource method listLoggers in 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource contains 
> empty path annotation.
> WARNING: The (sub)resource method listConnectors in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource contains 
> empty path annotation.
> WARNING: The (sub)resource method createConnector in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource contains 
> empty path annotation.
> WARNING: The (sub)resource method listConnectorPlugins in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource 
> contains empty path annotation.
> WARNING: The (sub)resource method serverInfo in 
> org.apache.kafka.connect.runtime.rest.resources.RootResource contains empty 
> path annotation.
> Oct 09, 2019 11:32:08 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.RootResource registered in 
> SERVER runtime does not implement any provider interfaces applicable in the 
> SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.RootResource will be ignored. 
> Oct 09, 2019 11:32:08 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource registered 
> in SERVER runtime does not implement any provider interfaces applicable in 
> the SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource will be 
> ignored. 
> Oct 09, 2019 11:32:08 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource registered in 
> SERVER runtime does not implement any provider interfaces applicable in the 
> SERVER runtime. Due to constraint configuration problems the provider 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource will be 
> ignored. 
> Oct 09, 2019 11:32:08 PM org.glassfish.jersey.internal.inject.Providers 
> checkProviderRuntime
> WARNING: A provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource 
> registered in SERVER runtime does not implement any provider interfaces 
> applicable in the SERVER runtime. Due to constraint configuration problems 
> the provider 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource will 
> be ignored. 
> Oct 09, 2019 11:32:09 PM org.glassfish.jersey.internal.Errors logErrors
> WARNING: The following warnings have been detected: WARNING: The 
> (sub)resource method listLoggers in 
> org.apache.kafka.connect.runtime.rest.resources.LoggingResource contains 
> empty path annotation.
> WARNING: The (sub)resource method listConnectors in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource contains 
> empty path annotation.
> WARNING: The (sub)resource method createConnector in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorsResource contains 
> empty path annotation.
> WARNING: The (sub)resource method listConnectorPlugins in 
> org.apache.kafka.connect.runtime.rest.resources.ConnectorPluginsResource 
> contains empty path annotation.
> WARNING: The (sub)resource method serverInfo in 
> org.apache.kafka.connect.runtime.rest.resources.RootResource contains empty 
> path annotation.
> {code}



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