5.3 not working with JDK9+

Hello folks,

When we want to upgrade from 5.2 to 5.3 none of our Spring Boot applications is able to start. We use Spring Boot 2.0.x with JDK10 respectively Spring Boot 2.1.2 with JDK11. With JDK8 it’s working.

Our configuration is placed in a logback-spring.xml simply looking like this:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <include resource="org/springframework/boot/logging/logback/defaults.xml"/>

  <springProperty scope="context" name="profiles" source="spring.profiles.active"
    defaultValue="none"/>

  <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
    <encoder>
      <pattern>${CONSOLE_LOG_PATTERN}</pattern>
      <charset>utf8</charset>
    </encoder>
  </appender>

  <appender name="consoleJson" class="ch.qos.logback.core.ConsoleAppender">
    <encoder class="net.logstash.logback.encoder.LogstashEncoder"/>
  </appender>

  <logger name="com" level="ERROR" />
  <logger name="io" level="ERROR" />
  <logger name="org" level="ERROR" />
  <logger name="springfox" level="ERROR" />
  <logger name="feign.Logger" level="INFO" />

  <logger name="our.package.names" level="INFO" />

  <root level="INFO">
    <if condition='isDefined("KUBERNETES_PORT")' >
      <then>
        <appender-ref ref="consoleJson"/>
      </then>
      <else>
        <appender-ref ref="CONSOLE"/>
      </else>
    </if>
  </root>
</configuration>

Any clue why this is happening?

[joschi]

Since I ran into the same problem, here’s a blog article explaining the background: https://jesperdj.com/2018/09/30/jaxb-on-java-9-10-11-and-beyond/

[mmaeller]

Those JDK9+ pitfalls -.- I’ve been confused since the class is available, but you have to activate the module on purpose for JDK9/10. Sorry guys, time for weekend ¯_(ツ)_/¯