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问题:
I am getting error java.lang.ClassNotFoundException kafka.api.OffsetRequest while trying integrate Kafka to our Storm topology. What versions you are running and it is working? My pom.xml
<dependency> <groupId>org.apache.storm</groupId> <artifactId>storm-core</artifactId> <version>0.9.2-incubating</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.apache.storm</groupId> <artifactId>storm-kafka</artifactId> <version>0.9.2-incubating</version> </dependency>
回答1:
Finally I solved it by implementing my own Kafka SPOUT (reusing example code) with this dependencies:
<dependency> <groupId>org.apache.storm</groupId> <artifactId>storm-core</artifactId> <version>0.9.4</version> </dependency> <dependency> <groupId>org.apache.kafka</groupId> <artifactId>kafka_2.9.2</artifactId> <version>0.8.1.1</version> <scope>compile</scope> <exclusions> <exclusion> <artifactId>jmxri</artifactId> <groupId>com.sun.jmx</groupId> </exclusion> <exclusion> <artifactId>jms</artifactId> <groupId>javax.jms</groupId> </exclusion> <exclusion> <artifactId>jmxtools</artifactId> <groupId>com.sun.jdmk</groupId> </exclusion> </exclusions> </dependency>
回答2:
I can successfully use kafka.api.OffsetRequest with the following sample topology (KafkaSpoutTestTopology) in a Docker cluster: https://github.com/wurstmeister/storm-kafka-0.8-plus-test The topology uses storm-kafka version 0.9.3. Note: "fig" command is replaced with "docker-compose" command.
EarliestTime() and LatestTime() method work fine.
