[LOG4J2-2906] Log4j2 Cloud Config Logging System can't load config

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.13.2
• Fix Version/s: 2.14.0
• Component/s: Configuration
• Assignee: Unassigned
• Reporter: Stephen Joyner
• Created: 11/Aug/20 13:28
• Updated: 15/Aug/20 23:18
• Resolved: 15/Aug/20 23:18

Description

When the Log4j2CloudConfigLoggingSystem class runs the getStandardConfigLocations() method, if the log4j.configurationFile property is set, a StackTrace will be thrown. This happens because Arrays.asList() is used to convert the String[] to a list, but the list that is returned cannot be modified using any methods that would change the size of the array.

Exception in thread "Thread-18" java.lang.UnsupportedOperationExceptionException in thread "Thread-18" java.lang.UnsupportedOperationException at java.util.AbstractList.add(AbstractList.java:148) at java.util.AbstractList.add(AbstractList.java:108) at org.apache.logging.log4j.spring.cloud.config.client.Log4j2CloudConfigLoggingSystem.getStandardConfigLocations(Log4j2CloudConfigLoggingSystem.java:92) at org.springframework.boot.logging.AbstractLoggingSystem.getSelfInitializationConfig(AbstractLoggingSystem.java:93) at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithConventions(AbstractLoggingSystem.java:70) at org.springframework.boot.logging.AbstractLoggingSystem.initialize(AbstractLoggingSystem.java:60) at org.springframework.boot.logging.log4j2.Log4J2LoggingSystem.initialize(Log4J2LoggingSystem.java:144) at org.apache.logging.log4j.spring.cloud.config.client.Log4j2CloudConfigLoggingSystem.initialize(Log4j2CloudConfigLoggingSystem.java:82) at org.springframework.boot.context.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:289) at org.springframework.boot.context.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:264) at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:226) at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:203) at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:127) at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:76) at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:53) at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:342) at org.springframework.boot.SpringApplication.run(SpringApplication.java:305)

Issue Links

• links to: GitHub Pull Request #397