Konstantine Karantasis created KAFKA-8415: ---------------------------------------------
Summary: Interface ConnectorClientConfigOverridePolicy needs to be excluded from class loading isolation Key: KAFKA-8415 URL: https://issues.apache.org/jira/browse/KAFKA-8415 Project: Kafka Issue Type: Bug Components: KafkaConnect Affects Versions: 2.3.0 Reporter: Konstantine Karantasis Assignee: Konstantine Karantasis Fix For: 2.3.0 Classes or interfaces that implement {{ConnectorClientConfigOverridePolicy}} were recently added in Connect as plugins that can be loaded in class loading isolation. However the interface itself was not excluded from isolation itself, which results into definition conflicts. Any interface that is considered a base Connect plugin interface needs to be excluded by isolation itself (it's considered a "system" type). Here's the exception: {code:java} [2019-05-23 15:16:57,802] ERROR Stopping due to error (org.apache.kafka.connect.cli.ConnectDistributed:84) java.util.ServiceConfigurationError: org.apache.kafka.connect.connector.policy.ConnectorClientConfigOverridePolicy: Provider org.apache.kafka.connect.connector.policy.AllConnectorClientConfigOverridePolicy not a subtype at java.util.ServiceLoader.fail(ServiceLoader.java:239) at java.util.ServiceLoader.access$300(ServiceLoader.java:185) at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:376) at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404) at java.util.ServiceLoader$1.next(ServiceLoader.java:480) at org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader.getServiceLoaderPluginDesc(DelegatingClassLoader.java:343) at org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader.scanPluginPath(DelegatingClassLoader.java:317) at org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader.scanUrlsAndAddPlugins(DelegatingClassLoader.java:244) at org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader.registerPlugin(DelegatingClassLoader.java:236) at org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader.initPluginLoader(DelegatingClassLoader.java:205) at org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader.initLoaders(DelegatingClassLoader.java:182) at org.apache.kafka.connect.runtime.isolation.Plugins.<init>(Plugins.java:61) at org.apache.kafka.connect.cli.ConnectDistributed.startConnect(ConnectDistributed.java:91) at org.apache.kafka.connect.cli.ConnectDistributed.main(ConnectDistributed.java:78) {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)