ActiveMQ WebSocket 使用 NPE 警告淹没日志

Question

ActiveMQ 5.14.1 运行良好，但日志中充斥着该异常。

正在连接到：

<transportConnector name="wss" uri="wss://0.0.0.0:443?maximumConnections=5000&amp;wireFormat.maxFrameSize=104857600"/>

异常：

2016-12-07 11:28:56,106 | WARN  | / | org.eclipse.jetty.servlet.ServletHandler | qtp1782247761-29
java.lang.NullPointerException
    at org.apache.activemq.transport.ws.jetty9.WSServlet.doGet(WSServlet.java:88)[activemq-http-5.14.1.jar:5.14.1]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)[tomcat-servlet-api-8.0.24.jar:]
    at org.eclipse.jetty.websocket.servlet.WebSocketServlet.service(WebSocketServlet.java:167)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)[tomcat-servlet-api-8.0.24.jar:]
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:808)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:587)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1129)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at org.eclipse.jetty.server.Server.handle(Server.java:499)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at org.eclipse.jetty.io.AbstractConnection.run(AbstractConnection.java:540)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at org.eclipse.jetty.util.thread.QueuedThreadPool.run(QueuedThreadPool.java:555)[jetty-all-9.2.13.v20150730.jar:9.2.13.v20150730]
    at java.lang.Thread.run(Thread.java:745)[:1.7.0_80]

这是一个真正的错误吗？

Answer 1

这似乎与这个问题 (AMQ-6491) 相同，当您出于某种原因尝试向代理发送 GET 请求时会发生该问题。通常你不会那样做，但有些人似乎已经用它来破解 Chrome 等中的限制。这已在 ActiveMQ 5.14.2 版本中修复。

ActiveMQ WebSocket 使用 NPE 警告淹没日志

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