[CAUSEWAY-2458] Deploying demo-wicket app to k8s causes a logging issue, won't start

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0-M4
• Fix Version/s: 2.0.0-M5
• Environment: k3d on ubunti 20.04
• Assignee: Daniel Keir Haywood
• Reporter: Daniel Keir Haywood
• Created: 02/Nov/20 08:37
• Updated: 05/Nov/20 22:23
• Resolved: 05/Nov/20 22:23

Description

Kinda odd, because I don't see the issue when using Docker on my PC.  But fails on a k8s deployment (k3d).  I guess it might be the order in which the JARs are discovered at runtime.

SLF4J: Class path contains multiple SLF4J bindings.02/11/2020 08:26:59 SLF4J: Found binding in [jar:file:/app/libs/log4j-slf4j-impl-2.13.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]02/11/2020 08:26:59 SLF4J: Found binding in [jar:file:/app/libs/logback-classic-1.2.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]02/11/2020 08:26:59 SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.02/11/2020 08:26:59 SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]02/11/2020 08:26:59 Exception in thread "main" java.lang.ExceptionInInitializerError02/11/2020 08:26:59 	at demoapp.webapp.wicket.DemoAppWicket.main(DemoAppWicket.java:75)02/11/2020 08:26:59 Caused by: org.apache.logging.log4j.LoggingException: log4j-slf4j-impl cannot be present with log4j-to-slf4j02/11/2020 08:26:59 	at org.apache.logging.slf4j.Log4jLoggerFactory.validateContext(Log4jLoggerFactory.java:49)02/11/2020 08:26:59 	at org.apache.logging.slf4j.Log4jLoggerFactory.newLogger(Log4jLoggerFactory.java:39)02/11/2020 08:26:59 	at org.apache.logging.slf4j.Log4jLoggerFactory.newLogger(Log4jLoggerFactory.java:30)02/11/2020 08:26:59 	at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:54)02/11/2020 08:26:59 	at org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:30)02/11/2020 08:26:59 	at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:363)02/11/2020 08:26:59 	at org.apache.commons.logging.LogAdapter$Slf4jAdapter.createLocationAwareLog(LogAdapter.java:130)02/11/2020 08:26:59 	at org.apache.commons.logging.LogAdapter.createLog(LogAdapter.java:91)02/11/2020 08:26:59 	at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:67)02/11/2020 08:26:59 	at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:59)02/11/2020 08:26:59 	at org.springframework.boot.SpringApplication.<clinit>(SpringApplication.java:196)02/11/2020 08:26:59 	... 1 more

 

The fix would seem to be: https://stackoverflow.com/a/61873064/56880