problems with getting basic logging up with springboot and logback

well what do you know - dependency management issue - the latest springboot-starter-logging is only using slf4j-api.1.7.13,

however if you get the latest logback which i did logback_classic.1.1.5 there was breaking issue somewhere in the Api client librray that didnt export the class - which is why it couldnt be found. see logback issue/news

if you explicitly add the dependency

...compile 'ch.qos.logback:logback-classic:1.1.5'compile 'org.slf4j:slf4j-api:1.7.16'

to gradle.build, refresh and retry it all starts to work as nature expected. Blimey painful as usual as these things normally are

java.lang.NoClassDefFoundError: org/slf4j/event/LoggingEvent

Logback-classic version 1.1.4 and later require slf4j-api version 1.7.15 or later.With an earlier slf4j-api.jar in the classpath, attempting introspection of a Logger instance returned by logback version 1.1.4 or later will result in a NoClassDefFoundError similar to that shown below.

Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/event/LoggingEvent    at java.lang.Class.getDeclaredMethods0(Native Method)    at java.lang.Class.privateGetDeclaredMethods(Class.java:2451)    at java.lang.Class.privateGetPublicMethods(Class.java:2571)    at java.lang.Class.getMethods(Class.java:1429)    at java.beans.Introspector.getPublicDeclaredMethods(Introspector.java:1261)    at java.beans.Introspector.getTargetMethodInfo(Introspector.java:1122)    at java.beans.Introspector.getBeanInfo(Introspector.java:414)    at java.beans.Introspector.getBeanInfo(Introspector.java:161)

Placing slf4j-api.jar version 1.7.15 or later in the classpath should solve the issue.Note that this problem only occurs with logback version 1.1.4 and later, other bindings such as slf4j-log4j, slf4j-jdk14 and slf4j-simple are unaffected.

corresponding maven dependency missing got it from https://mvnrepository.com/artifact/org.slf4j/slf4j-api/1.7.15

<dependency>            <groupId>org.slf4j</groupId>            <artifactId>slf4j-api</artifactId>            <version>1.7.15</version>        </dependency>