最近我们已将 Apache Tomcat 服务器从 8.5.32 更新到 8.5.45。我们注意到，Tomcat 启动后会向 catalina.out 发送 NullPointerException-s 的垃圾音，但是 Connector 保持正常工作，它处于打开状态并正在侦听：
10-Oct-2019 10:48:31.210 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 13452 ms
10-Oct-2019 10:48:31.247 SEVERE [https-jsse-nio-8443-exec-2] org.apache.coyote.AbstractProtocol$ConnectionHandler.process Error reading request, ignored
java.lang.NullPointerException
at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.getSslSupport(NioEndpoint.java:1415)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1504)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
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)
10-Oct-2019 10:48:31.247 SEVERE [https-jsse-nio-8443-exec-3] org.apache.coyote.AbstractProtocol$ConnectionHandler.process Error reading request, ignored
java.lang.NullPointerException
at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.getSslSupport(NioEndpoint.java:1415)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1504)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
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)
10-Oct-2019 10:48:31.247 SEVERE [https-jsse-nio-8443-exec-3] …