Hi:
I use HttpClient4.x in one SpringBoot applicaion. In one component, there
is only one shared instance of HttpClient. But when I apply it in one method
on high cocurrency condition in witch the qps reaches about 200.
It takes a long time from the start of the calling method to the return of the
result. I am definitely not a problem with computers and networks, because I
use tools directly, such as PostMan, which takes only a few milliseconds.
Any solutions?Thanks!
Bellow is key point of my code:
private void check(){
if(client==null ){
ConnectionKeepAliveStrategy myStrategy = new
ConnectionKeepAliveStrategy() {
@Override
public long getKeepAliveDuration(HttpResponse response,
HttpContext context) {
HeaderElementIterator it = new BasicHeaderElementIterator
(response.headerIterator(HTTP.CONN_KEEP_ALIVE));
while (it.hasNext()) {
HeaderElement he = it.nextElement();
String param = he.getName();
String value = he.getValue();
if (value != null && param.equalsIgnoreCase
("timeout")) {
return Long.parseLong(value) * 1000;
}
}
return 60 * 1000;
}
};
PoolingHttpClientConnectionManager manager = new
PoolingHttpClientConnectionManager();
manager.setMaxTotal(concurrentConfig.getHttpQueryMax());
// manager.setDefaultMaxPerRoute(1000);
// manager.setMaxPerRoute(new HttpRoute(new
HttpHost("172.16.40.104:7070")),300);
client=HttpClients.custom().setConnectionManager(manager).setKeepAliveStrategy(myStrategy).setDefaultRequestConfig(RequestConfig.custom().setStaleConnectionCheckEnabled(true).build()).build();
}
}
public String query(String url, HttpServletRequest request,String bodyString)
throws Exception{
String queryUrl=url+"/kylin/api/query";
HttpPost post = new HttpPost(queryUrl);
HttpUtil.copyPost(post,request, bodyString);
check();
try {
long star = System.currentTimeMillis();
HttpResponse response = client.execute(post);
System.out.println(System.currentTimeMillis()-star);
String resString = EntityUtils.toString(response.getEntity());
return resString;
} catch (Exception e) {
e.printStackTrace();
}finally {
post.releaseConnection();
}
}
shicheng31...@gmail.com
