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

Question

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

App Engine 应用程序的日志中充满了有关断开连接时捕获异常的警告。异常消息是 java.net.SocketException: Invalid request: Invalid how. 这对我来说没有任何意义。

堆栈跟踪似乎表明这一行是原因:mConnection.close();(mConnection 是一个 java.sql.Connection 对象)。

除了日志中的警告外，一切似乎都正常。什么可能导致此消息？

下面是带有堆栈跟踪的完整日志消息:

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

此问题似乎已由 Google 解决。这是他们的回应:

Thanks I believe the issue should be resolved, this was an old bug that has been fixed recently. Please reopen if you do see the issue recur.

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