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  1. ,
    Expert tip

    Check if you didn't forget to instantiate your topic in the kafka broker.

  2. ,

    This error comes up in the old version of spring-test , you should update tospring test 4.3.2

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org/apache/hadoop/util/ReflectionUtils
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java.lang.ClassNotFoundException: org.apache.hadoop.util.ReflectionUtils	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)	at org.apache.oozie.service.Services.setServiceInternal(Services.java:374)	at org.apache.oozie.service.Services.(Services.java:110)	at org.apache.oozie.tools.OozieDBCLI.getJdbcConf(OozieDBCLI.java:163)	at org.apache.oozie.tools.OozieDBCLI.createConnection(OozieDBCLI.java:845)	at org.apache.oozie.tools.OozieDBCLI.validateConnection(OozieDBCLI.java:853)	at org.apache.oozie.tools.OozieDBCLI.createDB(OozieDBCLI.java:181)	at org.apache.oozie.tools.OozieDBCLI.run(OozieDBCLI.java:125)	at org.apache.oozie.tools.OozieDBCLI.main(OozieDBCLI.java:76)