出于项目目的，我必须坚持使用Java 1.6进行开发，我使用了异步客户端jar文件并将其合并到我的项目中以实现异步功能，并使用java 1.6开发并导出了JAR。这个jar包含在java 7上运行的另一个Web项目的构建路径中。它在java 7 64位和tomcat7 64位上运行良好。但是当使用java 7 32位和tomcat7 32位时看到以下错误：
java.lang.LinkageError: loader constraint violation: when resolving method "org.slf4j.impl.StaticLoggerBinder.getLoggerFactory()Lorg/slf4j/ILoggerFactory;" the class loader (instance of org/apache/catalina/loader/WebappClassLoader) of the current class, org/slf4j/LoggerFactory, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, org/slf4j/impl/StaticLoggerBinder, have different Class objects for the type taticLoggerBinder.getLoggerFactory()Lorg/slf4j/ILoggerFactory; used in the signature
at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:299)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:269)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:281)
at com.ning.http.client.AsyncHttpClient.<clinit>(AsyncHttpClient.java:146)
at com.netspective.ems.invoker.AsyncApiInvoker.post(AsyncApiInvoker.java:39)
at com.netspective.ems.invoker.AsyncApiInvoker.post(AsyncApiInvoker.java:32)
at com.netspective.ems.invoker.AsyncApiInvoker.post(AsyncApiInvoker.java:73)
at com.netspective.ems.api.ExceptionApi.notify(ExceptionApi.java:42)
at com.netspective.ems.NetspectiveEMS.prepareAndPostDetails(NetspectiveEMS.java:101)
at com.netspective.ems.NetspectiveEMS.log(NetspectiveEMS.java:168)
at com.netspective.watchtower.sdk.log4j.WatchtowerClientAppender.append(WatchtowerClientAppender.java:32)
at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)
at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)
at org.apache.log4j.Category.callAppenders(Category.java:206) …