使用标记的 logstash-logback-encoder 错误

Question

使用 slf4j.Marker 时出现 java.lang.IncompatibleClassChangeError。看来我在类路径中有几个 slf4j 版本。但是在执行 maven dependency:tree 时，它​​说只有 slf4j 1.7.25。你们有什么想法可能是什么问题吗？依赖如下：

• 回退 1.2.3
• slf4j 1.7.25
• logstash-logback-encoder 5.0

应用部署在 WildFlly 8.2.1 AS 上。

> -ERROR in net.logstash.logback.appender.LogstashTcpSocketAppender[stash] - Unable to process event: Class net.logstash.logback.marker.ObjectAppendingMarker does not implement the requested interface org.slf4j.Marker java.lang.IncompatibleClassChangeError: Class net.logstash.logback.marker.ObjectAppendingMarker does not implement the requested interface org.slf4j.Marker
> 
> 2018-03-31 00:17:03,287 INFO  [stdout] (logback-appender-stash-127.0.0.1:4560-2)  at java.lang.IncompatibleClassChangeError: Class net.logstash.logback.marker.ObjectAppendingMarker does not implement the requested interface org.slf4j.Marker
> 
> 2018-03-31 00:17:03,287 INFO  [stdout] (logback-appender-stash-127.0.0.1:4560-2)  at  at net.logstash.logback.composite.loggingevent.JsonMessageJsonProvider.writeTo(JsonMessageJsonProvider.java:52)
> 
> 2018-03-31 00:17:03,287 INFO  [stdout] (logback-appender-stash-127.0.0.1:4560-2)  at  at net.logstash.logback.composite.loggingevent.JsonMessageJsonProvider.writeTo(JsonMessageJsonProvider.java:31)
> 
> 2018-03-31 00:17:03,287 INFO  [stdout] (logback-appender-stash-127.0.0.1:4560-2)  at  at net.logstash.logback.composite.JsonProviders.writeTo(JsonProviders.java:77)
> 
> 2018-03-31 00:17:03,287 INFO  [stdout] (logback-appender-stash-127.0.0.1:4560-2)  at  at net.logstash.logback.composite.CompositeJsonFormatter.writeEventToGenerator(CompositeJsonFormatter.java:175)
> 
> 2018-03-31 00:17:03,288 INFO  [stdout] (logback-appender-stash-127.0.0.1:4560-2)  at  at net.logstash.logback.composite.CompositeJsonFormatter.writeEventToOutputStream(CompositeJsonFormatter.java:152)
> 
> 2018-03-31 00:17:03,288 INFO  [stdout] (logback-appender-stash-127.0.0.1:4560-2)  at  at net.logstash.logback.encoder.CompositeJsonEncoder.encode(CompositeJsonEncoder.java:114)
> 
> 2018-03-31 00:17:03,288 INFO  [stdout] (logback-appender-stash-127.0.0.1:4560-2)  at  at net.logstash.logback.encoder.CompositeJsonEncoder.encode(CompositeJsonEncoder.java:32)
> 
> 2018-03-31 00:17:03,288 INFO  [stdout] (logback-appender-stash-127.0.0.1:4560-2)  at  at net.logstash.logback.appender.AbstractLogstashTcpSocketAppender$TcpSendingEventHandler.onEvent(AbstractLogstashTcpSocketAppender.java:454)
> 
> 2018-03-31 00:17:03,288 INFO  [stdout] (logback-appender-stash-127.0.0.1:4560-2)  at  at net.logstash.logback.appender.AbstractLogstashTcpSocketAppender$TcpSendingEventHandler.onEvent(AbstractLogstashTcpSocketAppender.java:264)
> 
> 2018-03-31 00:17:03,288 INFO  [stdout] (logback-appender-stash-127.0.0.1:4560-2)  at  at net.logstash.logback.appender.AsyncDisruptorAppender$EventClearingEventHandler.onEvent(AsyncDisruptorAppender.java:330)
> 
> 2018-03-31 00:17:03,288 INFO  [stdout] (logback-appender-stash-127.0.0.1:4560-2)  at  at net.logstash.logback.appender.AsyncDisruptorAppender$EventClearingEventHandler.onEvent(AsyncDisruptorAppender.java:318)
> 
> 2018-03-31 00:17:03,288 INFO  [stdout] (logback-appender-stash-127.0.0.1:4560-2) 

Answer 1

你是对的，因为类路径中有多个 slf4j 版本，所以会出现这个问题

现在我们需要找出它是如何发生的

案例一：

当我查看 logback 1.2.3 的 maven 存储库时，我发现它已经依赖于 slf4j。

所以当你加载 logback 1.2.3 时，slf4j 会自动添加

所以你不需要在 pom 中添加额外的 slf4j，如果你这样做，请删除它。

请参阅 link 了解更多详细信息 - 编译依赖项：

案例2：

查看wildfly/modules/system/layers/base/org/slf4j

文件夹看看是否已经添加了任何 slf4j jars。如果是这样，您在编译时只需要 slf4j

添加<scope>compile</scope>