Question

使用slf4j.Marker时，我收到了java.lang.IncompatibleClassChangeError。看来我在classpath中有几个slf4j版本。但是当执行maven依赖时：树它说只有slf4j 1.7.25。你们有什么想法可能是什么问题吗？依赖关系如下：

logback 1.2.3
slf4j 1.7.25
logstash-logback-encoder 5.0

该应用程序部署在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

嗯，你是对的，因为classpath中的几个slf4j版本出现了这个问题

现在我们需要了解它是如何发生的

案例1：

当我查看logback 1.2.3的maven reporitory时，我发现它已经依赖于slf4j。

因此，当您加载logback 1.2.3时，将自动添加slf4j

所以你不需要在pom中添加额外的slf4j，如果你这样做，请将其删除。

有关详细信息，请参阅link - 编译Depencencies：

案例2：

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

文件夹查看是否已添加任何slf4j罐子。如果是这样，你只需要编译

就需要slf4j

添加<scope>compile</scope>

使用标记的logstash-logback-encoder错误

1 个答案: