I have a HTTP server in Android. I create a new thread for each of the HTTP requests as in the link mentioned:
When I issue multiple GET requests, sometimes I am getting an exception like the following:
01-22 10:28:22.779: W/System.err(2019): java.net.SocketException: recvfrom failed: ECONNRESET (Connection reset by peer)
01-22 10:28:22.779: W/System.err(2019): at libcore.io.IoBridge.maybeThrowAfterRecvfrom(IoBridge.java:552)
01-22 10:28:22.779: W/System.err(2019): at libcore.io.IoBridge.recvfrom(IoBridge.java:516)
01-22 10:28:22.779: W/System.err(2019): at java.net.PlainSocketImpl.read(PlainSocketImpl.java:488)
01-22 10:28:22.779: W/System.err(2019): at java.net.PlainSocketImpl.access$000(PlainSocketImpl.java:46)
01-22 10:28:22.784: W/System.err(2019): at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:240)
01-22 10:28:22.784: W/System.err(2019): at org.apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.java:103)
01-22 10:28:22.784: W/System.err(2019): at org.apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.java:191)
01-22 10:28:22.784: W/System.err(2019): at org.apache.http.impl.io.HttpRequestParser.parseHead(HttpRequestParser.java:71)
01-22 10:28:22.784: W/System.err(2019): at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:174)
01-22 10:28:22.784: W/System.err(2019): at org.apache.http.impl.AbstractHttpServerConnection.receiveRequestHeader(AbstractHttpServerConnection.java:141)
01-22 10:28:22.784: W/System.err(2019): at org.apache.http.protocol.HttpService.handleRequest(HttpService.java:135)
01-22 10:28:22.784: W/System.err(2019): at com.example.devicecommunication.ConnectService$WorkerThread.run(ConnectService.java:744)
01-22 10:28:22.784: W/System.err(2019): Caused by: libcore.io.ErrnoException: recvfrom failed: ECONNRESET (Connection reset by peer)
01-22 10:28:22.784: W/System.err(2019): at libcore.io.Posix.recvfromBytes(Native Method)
01-22 10:28:22.784: W/System.err(2019): at libcore.io.Posix.recvfrom(Posix.java:131)
01-22 10:28:22.784: W/System.err(2019): at libcore.io.BlockGuardOs.recvfrom(BlockGuardOs.java:164)
01-22 10:28:22.789: W/System.err(2019): at libcore.io.IoBridge.recvfrom(IoBridge.java:513)
01-22 10:28:22.789: W/System.err(2019): ... 10 more
I am not sure why this occurs. Below is the code used and this exception occurs at handleRequest() method or in conn.close().
class WorkerThread extends Thread{
HttpService httpService;
HttpServerConnection conn;
public WorkerThread(HttpService httpService, HttpServerConnection conn){
super();
this.httpService = httpService;
this.conn = conn;
}
public void run(){
HttpContext context = new BasicHttpContext(null);
try {
Log.d(TAG,"Going to call Handle request here");
this.httpService.handleRequest(this.conn, context);
} catch (ConnectionClosedException ex) {
ex.printStackTrace();
Log.d(TAG,"Client closed connection exception");
} catch (IOException ex) {
ex.printStackTrace();
Log.d(TAG,"I/O exceptionnnnn " + ex.getMessage());
} catch (HttpException ex) {
Log.d(TAG,"Unrecoverable HTTP protocol violation: " + ex.getMessage());
}
finally {
Log.d(TAG,"Inside Finally Block");
try {
this.conn.close();
Log.d(TAG,"Connection closed successfully");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
Any idea why this occurs or how can it be resolved?
When I passed the DefaultHttpServerConnection attribute to the handle() method using the following code snippet, I did not get this exception:
In the WorkerThread class, pass the DefaultHttpServerConnection connection object using the following code:
HttpContext context = new BasicHttpContext(null);
context.setAttribute("XXX",this.conn);
In the handle() method, get the connection object using,
(DefaultHttpServerConnection)context.getAttribute("XXX");
Hope it helps someone!
来源：https://stackoverflow.com/questions/14454694/java-net-socketexception-recvfrom-failed-econnreset-connection-reset-by-peer