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}
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