reactor.core.CorePublisher

java.lang.NoClassDefFoundError: reactor.core.CorePublisher

升级

<dependency>

<groupId>io.projectreactor</groupId>

<artifactId>reactor-core</artifactId>

<version>3.3.11.RELEASE</version>

</dependency>

原来是

<dependency>

<groupId>io.projectreactor</groupId>

<artifactId>reactor-core</artifactId>

<optional>true</optional>

<version>3.2.11.RELEASE</version>

</dependency>