java.lang.UnsupportedOperationException: null

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java.lang.UnsupportedOperationException: null
at org.apache.catalina.loader.WebappClassLoaderBase.loadedByThisOrChild(WebappClassLoaderBase.java:1986)
at org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks(WebappClassLoaderBase.java:1890)
at org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalsForLeaks(WebappClassLoaderBase.java:1844)
at org.apache.catalina.loader.WebappClassLoaderBase.clearReferences(WebappClassLoaderBase.java:1514)
at org.apache.catalina.loader.WebappClassLoaderBase.stop(WebappClassLoaderBase.java:1460)
at org.apache.catalina.loader.WebappLoader.stopInternal(WebappLoader.java:447)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:229)
at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5436)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:229)
at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1419)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

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