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Karsten Schnitter commented on KAFKA-7491: ------------------------------------------ Hi, this issue has not seen much action in quite some time. I am experiencing the same issue. I tried patch-module in the pom.xml but to no avail: {code:xml} <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <executions> <execution> <id>test-compile</id> <phase>process-test-sources</phase> <goals> <goal>testCompile</goal> </goals> <configuration> <compilerArgs> <arg>--patch-module</arg> <arg>kafka.streams=${settings.localRepository}/org/apache/kafka/kafka-streams-test-utils/3.0.1/kafka-streams-test-utils-3.0.1.jar</arg> </compilerArgs> </configuration> </execution> </executions> </plugin> {code} That way, I got around the "missing symbol" issue, that is caused by the test-util sitting in the same package on the classpath, where it is abandoned due to the automatic kafka-streams module. But compilation still errors with an incompatible type error for a TestRecord. The offending code in my project is: {code:java} private TestRecord<String, QuotaStatisticsMessage> readOutput() { return outputTopic.readRecord(); } {code} The error message is: {noformat} incompatible types: org.apache.kafka.streams.test.TestRecord<java.lang.String,com.sap.cf.hcp.logging.kafka.streams.quota.data.model.QuotaStatisticsFactory.QuotaStatisticsMessage> cannot be converted to org.apache.kafka.streams.test.TestRecord<java.lang.String,com.sap.cf.hcp.logging.kafka.streams.quota.data.model.QuotaStatisticsFactory.QuotaStatisticsMessage> {noformat} I cannot say for sure, if my own {{QuotaStatisticsMessage}} may cause the problem, but I doubt it, since there are no failures at other places. I think, the {{TestRecord}} might be incompatible, maybe due to the {{--patch-module}}. Is there any idea, how to proceed. One way would be to release a second test-util with different package names. > Kafka streams and Kafka streams test utils have split packages > -------------------------------------------------------------- > > Key: KAFKA-7491 > URL: https://issues.apache.org/jira/browse/KAFKA-7491 > Project: Kafka > Issue Type: Bug > Components: streams > Reporter: Robin Van Praet > Priority: Major > > When trying to test a Kafka Streams application using JDK 9+, using the > module path, (test) compilation errors occur. > The TopologyTestDriver cannot be located in kafka-streams-test-utils because > package 'org.apache.kafka.streams' is already provided by module > kafka-streams. > Please make sure that packages are not re-used between production libraries > and test util libraries. -- This message was sent by Atlassian Jira (v8.20.1#820001)