有什么可以java.net.SocketException异常的原因：recvfrom的失败：ETIMEDOUT？ [英] What can be a cause of java.net.SocketException: recvfrom failed: ETIMEDOUT?

问题描述

我在我的应用程序得到了这个问题。这是罕见的，很难被发现。这是一个堆栈：

I have got this issue in my app. It is rare and difficult to spot. This is a stack:

2012-11-30 08:42:22.745myapp.package.MyCommand is failed.java.net.SocketException: recvfrom failed: ETIMEDOUT (Connection timed out)
at libcore.io.IoBridge.maybeThrowAfterRecvfrom(IoBridge.java:542)
at libcore.io.IoBridge.recvfrom(IoBridge.java:506)
at java.net.PlainSocketImpl.read(PlainSocketImpl.java:488)
at java.net.PlainSocketImpl.access$000(PlainSocketImpl.java:46)
at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:240)
at org.apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.java:103)
at org.apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.java:191)
at org.apache.http.impl.conn.DefaultResponseParser.parseHead(DefaultResponseParser.java:82)
at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:174)
at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:180)
at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:235)
at org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader(AbstractClientConnAdapter.java:259)
at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:279)
at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:121)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:428)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
at android.net.http.AndroidHttpClient.execute(AndroidHttpClient.java:252)
at myapp.package.HttpCommand.executeRequest(HttpCommand.java:176)
at myapp.package.HttpCommand.execute(HttpCommand.java:83)
at myapp.package.NetworkService$1.run(NetworkService.java:60)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:442)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
Caused by: libcore.io.ErrnoException: recvfrom failed: ETIMEDOUT (Connection timed out)
at libcore.io.Posix.recvfromBytes(Native Method)
at libcore.io.Posix.recvfrom(Posix.java:131)
at libcore.io.BlockGuardOs.recvfrom(BlockGuardOs.java:164)
at libcore.io.IoBridge.recvfrom(IoBridge.java:503)
... 26 more

在我的应用程序我有一个执行所有指令到​​服务器类：

In my app I have a class that executes all command to the server:

private static final AndroidHttpClient client = AndroidHttpClient.newInstance(TAG);

HttpUriRequest request = getRequest(context);
        HttpResponse response = client.execute(request);
        final int statusCode = response.getStatusLine().getStatusCode();
        if (HttpStatus.SC_OK == statusCode) {
            final String json = EntityUtils.toString(response.getEntity());
            handleResult(json);
            Log.i(TAG, json);
        } else {
            handleError(SERVER_CODE);
        } 

你有任何想法是什么这个问题的原因是什么？

Do you have any ideas what is the cause of this issue?

推荐答案

在收到连接超时的错误，我会找：

When receiving a "Connection Timeout" error, I would look for:

• 在重负载的网络连接
• 在重负载的服务器
• 在不充分的连接超时参数会话
• 在冰淇淋三明治和早期检查有关DNS缓存加倍。请参阅 DNS缓存在的InetAddress 和发行7904：Android不支持TTL和缓存10分钟
DNS结果

• Heavy loaded network connection
• Heavy loaded server
• Inadequate connection timeout parameters for the session
• In Ice Cream Sandwich and earlier check if related to DNS double caching. See DNS caching in InetAddress and Issue 7904: Android does not support TTL and caches DNS result for 10 minutes

问候。

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