混淆代码，spring 升级到5.2.7后，停止tomcat8.5.51长时间无响应，查看后台日志报如下错误：
14-Jul-2020 11:00:04.300 严重 [Catalina-startStop-2] org.apache.catalina.core.ContainerBase.stopInternal A child container failed during stop java.util.concurrent.ExecutionException: java.lang.InternalError: Malformed class name at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at org.apache.catalina.core.ContainerBase.stopInternal(ContainerBase.java:990) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257) at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1428) at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1417) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.InternalError: Malformed class name at java.lang.Class.getSimpleBinaryName(Class.java:1450) at java.lang.Class.getSimpleName(Class.java:1309) at java.lang.Class.getCanonicalName(Class.java:1399) at org.apache.catalina.loader.WebappClassLoaderBase.getPrettyClassName(WebappClassLoaderBase.java:2049) at org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks(WebappClassLoaderBase.java:2013) at org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalsForLeaks(WebappClassLoaderBase.java:1941) at org.apache.catalina.loader.WebappClassLoaderBase.clearReferences(WebappClassLoaderBase.java:1608) at org.apache.catalina.loader.WebappClassLoaderBase.stop(WebappClassLoaderBase.java:1548) at org.apache.catalina.loader.WebappLoader.stopInternal(WebappLoader.java:446) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5439) ... 7 more Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -14 at java.lang.String.substring(String.java:1931) at java.lang.Class.getSimpleBinaryName(Class.java:1448) ... 17 more 14-Jul-2020 11:00:04.313 严重 [Thread-13] org.apache.catalina.core.ContainerBase.stopInternal A child container failed during stop java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: A child container failed during stop at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at org.apache.catalina.core.ContainerBase.stopInternal(ContainerBase.java:990) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257) at org.apache.catalina.core.StandardService.stopInternal(StandardService.java:486) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257) at org.apache.catalina.core.StandardServer.stopInternal(StandardServer.java:787) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257) at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:493) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:389) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:479) Caused by: org.apache.catalina.LifecycleException: A child container failed during stop at org.apache.catalina.core.ContainerBase.stopInternal(ContainerBase.java:997) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257) at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1428) at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1417) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) 14-Jul-2020 11:00:04.314 严重 [78] org.apache.catalina.startup.Catalina.stopServer Catalina.stop: org.apache.catalina.LifecycleException: A child container failed during stop at org.apache.catalina.core.ContainerBase.stopInternal(ContainerBase.java:997) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257) at org.apache.catalina.core.StandardService.stopInternal(StandardService.java:486) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257) at org.apache.catalina.core.StandardServer.stopInternal(StandardServer.java:787) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257) at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:493) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:389) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:479)
解决方法：
找到”Allatori”的配置文件，定位到如下行：
<property name="classes-naming" value="unique"/>
然后修改为：
<property name="classes-naming" value="keep-$-sign"/>
重新混淆后，反复启停tomcat服务，均正常。
注意：本文归作者所有，未经作者允许，不得转载
