java - Intermittent "Socket closed" exception with HttpUrlConnection -


i have servlet application running under jboss 7.1.1/java 1.7 sends http requests server. works fine of time, (from 1 couple of times day) “socket closed” exception. i’ve been trying find out might causing far i’ve been unsuccessful. way, has been happening while application running under older versions of jboss/java versions might not relevant.

here’s excerpt method happens:

. . . . .

try  {      httpurlconnection conn = (httpurlconnection) urlendpoint.openconnection();     conn.setrequestmethod("post");     conn.setdoinput(true);     conn.setdooutput(true);     conn.setrequestproperty("content-type", "text/xml; charset=utf-8");     conn.setrequestproperty("charset", "utf-8");     dataoutputstream out = new dataoutputstream(conn.getoutputstream());     out.write(env.getbytes("utf-8"));     out.flush();     out.close();     inputstream iss = null;     conn.connect(); try {     iss = conn.getinputstream(); // exception caught

. . . . . .

and here’s exception looks like:

. . . . . .

java.net.socketexception: socket closed     @ java.net.socketinputstream.socketread0(native method)     @ java.net.socketinputstream.read(socketinputstream.java:150)     @ java.net.socketinputstream.read(socketinputstream.java:121)     @ java.io.bufferedinputstream.fill(bufferedinputstream.java:235)     @ java.io.bufferedinputstream.read1(bufferedinputstream.java:275)     @ java.io.bufferedinputstream.read(bufferedinputstream.java:334)     @ sun.net.www.http.httpclient.parsehttpheader(httpclient.java:633)     @ sun.net.www.http.httpclient.parsehttp(httpclient.java:579)     @ sun.net.www.protocol.http.httpurlconnection.getinputstream(httpurlconnection.java:1322)

. . . . . .

i came across posts mentioning sockets pool http connection keeping, i’m not sure whether , how can me solve problem have.

i’ve exhausted ideas had , grateful help.

it make more sense call conn.connect() before doing i/o. doesn't make sense @ afterwards. don't need close output stream.


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