[ https://jira.qos.ch/browse/SLF4J-423?page=com.atlassian.jira.plugin.system.i... ] Brett Wooldridge commented on SLF4J-423: ---------------------------------------- Thanks.  That seemed to work.  Too many ways to wire these libraries together and not enough clear documentation.

1.8.0-beta0 bug in log4j MDC handling -------------------------------------

Key: SLF4J-423 URL: https://jira.qos.ch/browse/SLF4J-423 Project: SLF4J Issue Type: Bug Components: Unspecified Affects Versions: 1.8.0-beta0 Environment: Java 9 Reporter: Brett Wooldridge Assignee: SLF4J developers list

When running with log4j 2.10.0, and using the slf4j-log4j12-1.8.0-beta0 release, the follow error is received: {code:java} java.lang.NoSuchFieldException: mdc at java.base/java.lang.Class.getDeclaredField(Unknown Source) at org.apache.log4j.MDCFriend.fixForJava9(MDCFriend.java:13) at org.slf4j.log4j12.Log4jMDCAdapter.<clinit>(Log4jMDCAdapter.java:38) at org.slf4j.log4j12.Log4j12ServiceProvider.initialize(Log4j12ServiceProvider.java:37) at org.slf4j.LoggerFactory.bind(LoggerFactory.java:153) at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:141) at org.slf4j.LoggerFactory.getProvider(LoggerFactory.java:413) at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:405) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:354) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:380){code} The MDC class in log4j-1.2-api-2.10.0.jar no longer contains a field named "mdc".  (This is on Java 9).  

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