I use HttpComponents 4.0.1 and i have an application that has to do about 20
millions of requests, normal get and post request.
I suddenly engaged a memory leak problem... i found several post where many
users has the same problem, and they solve it in several ways... but no one
seem to be the right one.
For testing memory leak i used for retrive pages google.it, as you can
see...
*****************
//test class
public void test_HttpRequest(){
MyUtil.MyApp.AppHandler app_handler = new
MyUtil.MyApp.AppHandler();
for(int i=0; i<10000; i++){
HttpGet httpget = new HttpGet("http://www.google.it/";);
httpget.setHeader("User-Agent", "Mozilla/5.0 (Windows;
U; Windows NT 5.1;
en-US; rv:1.8.1) Gecko/20061010 Firefox/2.0 (.NET CLR 3.5.30729)");
System.out.println("processing request num: "+(i+1));
new C_HttpRequestManager("google.it",
80,//server port
httpget,//method
true,//keep try
5000,//wait time in ms
false,//no proxy
null,//proxy host name
0,//proxy host port
app_handler).getResponse();
try {
System.out.println("waiting 2 s...");
Thread.sleep(2000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
System.out.println("requests completed, insert value...");
MyUtil.MyIO.Util.getLineFromStdInput();
}
*****************
now i show you the code about the http class request...
*****************
...
public void getResponse() {
final String function_name = "getResponse";
final String function_name_formatted =
this.class_name+"."+function_name+": ";
C_HttpResponseStatusEntity response = null;
do{
ccm = new SingleClientConnManager(params,
supportedSchemes);
httpclient = new DefaultHttpClient(ccm, params);
try {
h_response = httpclient.execute(target_host,
request);
} catch (ClientProtocolException e) {
try {
if(this.app_handler.hasLog())
this.app_handler.log.writeErr(e.toString());
} catch (BaseExcp e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
this.h_status = e.toString();
this.h_entity = e.toString();
} catch (IOException e) {
response = this.pharse_IOException(e);
if(response.getStatus().equals(this.SocketTimeoutException)){
if(this.app_handler.hasLog()){
try {
this.app_handler.log.writeInfo(function_name_formatted+SocketTimeoutException);
} catch (BaseExcp e1) {
// TODO Auto-generated
catch block
e1.printStackTrace();
this.app_handler.exitAppCarefully();
}
}
continue;
}else{
return response;
}
}
// Get hold of the response entity
HttpEntity entity = this.h_response.getEntity();
File f = new File(".\\entity_tmp");
java.io.FileOutputStream o = null;
try {
o = new FileOutputStream(f);
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
entity.writeTo(o);//stram the response to the
file tmp
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
this.request.abort();
try {
o.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
this.keep_try = false;
}while(this.keep_try);
this.ccm.shutdown();
this.ccm = null;
}
*****************
i hope for some smart suggestion!
Andrea
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