java.net.SocketException：无效的请求：无效如何

Question

我有一个应用程序在Google App Engine上运行，它是Android应用程序的后端。它基本上是Android应用程序和运行在我自己的服务器上的MySQL数据库之间的桥梁。

App Engine应用程序的日志中充满了关于断开时捕获的异常的警告。例外信息是java.net.SocketException: Invalid request: Invalid how.，这对我来说没有任何意义。

堆栈跟踪似乎指示此行为原因：mConnection.close();（mConnection是java.sql.Connection对象）。

除了在日志中的警告，一切似乎工作正常。什么可能导致此消息？

下面是一个堆栈跟踪的完整的日志信息：

10:41:05.477 
[s~appname/1.389899266979631246].<stderr>: Mon Jan 11 18:41:05 UTC 2016 WARN: Caught while disconnecting... 

EXCEPTION STACK TRACE: 



** BEGIN NESTED EXCEPTION ** 

java.net.SocketException 
MESSAGE: Invalid request: Invalid how. 

STACKTRACE: 

java.net.SocketException: Invalid request: Invalid how. 
    at com.google.appengine.api.socket.SocketApiHelper.translateError(SocketApiHelper.java:110) 
    at com.google.appengine.api.socket.SocketApiHelper.translateError(SocketApiHelper.java:119) 
    at com.google.appengine.api.socket.SocketApiHelper.makeSyncCall(SocketApiHelper.java:85) 
    at com.google.appengine.api.socket.AppEngineSocketImpl.shutdownInput(AppEngineSocketImpl.java:664) 
    at java.net.Socket.shutdownInput(Socket.java:1514) 
    at com.mysql.jdbc.MysqlIO.quit(MysqlIO.java:2184) 
    at com.mysql.jdbc.ConnectionImpl.realClose(ConnectionImpl.java:4451) 
    at com.mysql.jdbc.ConnectionImpl.close(ConnectionImpl.java:1599) 
    at com.appname.backend.DatabaseHelper.close(DatabaseHelper.java:71) 
    at com.appname.backend.SyncEndpoint.confirm(SyncEndpoint.java:191) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_$1.run(Method_.java:171) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_.privilegedInvoke(Method_.java:167) 
    at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_.invoke_(Method_.java:125) 
    at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_.invoke(Method_.java:44) 
    at com.google.api.server.spi.SystemService.invokeServiceMethod(SystemService.java:363) 
    at com.google.api.server.spi.SystemServiceServlet.execute(SystemServiceServlet.java:113) 
    at com.google.api.server.spi.SystemServiceServlet.doPost(SystemServiceServlet.java:71) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) 
    at com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:125) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:37) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at com.google.apphosting.utils.servlet.JdbcMySqlConnectionCleanupFilter.doFilter(JdbcMySqlConnectionCleanupFilter.java:60) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) 
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) 
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) 
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) 
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) 
    at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:260) 
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
    at org.mortbay.jetty.Server.handle(Server.java:326) 
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) 
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) 
    at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:78) 
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) 
    at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:148) 
    at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:469) 
    at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:437) 
    at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:444) 
    at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:256) 
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:308) 
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:300) 
    at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:441) 
    at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:235) 
    at java.lang.Thread.run(Thread.java:745) 


** END NESTED EXCEPTION ** 

Answer 1

这个问题似乎已被谷歌解决。这是他们的回应：

谢谢我相信这个问题应该得到解决，这是一个最近已经修复的旧bug。如果您确实看到问题重演，请重新打开。

来源：https://code.google.com/p/googleappengine/issues/detail?id=12664