在后臺連接了一個websocket連接，每60s就報如下錯誤，有知道這是什么情況的嗎？

2020-09-10 14:22:40 [Catalina-utility-1] ERROR org.apache.coyote.http11.Http11NioProtocol -Error processing async timeouts

java.util.concurrent.ExecutionException: java.lang.AbstractMethodError: Method org/apache/tomcat/websocket/server/WsHttpUpgradeHandler.timeoutAsync(J)V is abstract

at java.util.concurrent.FutureTask.report(FutureTask.java:122)

at java.util.concurrent.FutureTask.get(FutureTask.java:192)

at org.apache.coyote.AbstractProtocol.startAsyncTimeout(AbstractProtocol.java:615)

at org.apache.coyote.AbstractProtocol$1.run(AbstractProtocol.java:598)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.lang.Thread.run(Thread.java:748)

Caused by: java.lang.AbstractMethodError: Method org/apache/tomcat/websocket/server/WsHttpUpgradeHandler.timeoutAsync(J)V is abstract

at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.timeoutAsync(WsHttpUpgradeHandler.java)

at org.apache.coyote.http11.upgrade.UpgradeProcessorInternal.timeoutAsync(UpgradeProcessorInternal.java:78)

at org.apache.coyote.AbstractProtocol$2.run(AbstractProtocol.java:626)

... 8 common frames omitted

總結

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