tomcat线程一直处于RUNNABLE，不接受请求

Question

现在对tomcat一个工程（会通过httpurlconnection去请求别的资源）并发过多时候，tomcat直接跟挂去一样，再输入任何地址都一直不响应。通过java自带的检测工具看到像http-8080-1这样的http线程全部一直处于RUNNABLE状态，正常应该请求完处于WAITING。现在不知道是什么原因导致的，希望有大神给分析下，感激不尽！下面是线程dump，就随便贴两个："http-8080-7" daemon prio=6 tid=0x183bd400 nid=0x6f50 runnable [0x1958f000]
   java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:129)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:258)
at java.io.BufferedInputStream.read(BufferedInputStream.java:317)
- locked <0x09cd8e58> (a java.io.BufferedInputStream)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:687)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:632)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1195)
- locked <0x09b2a448> (a sun.net.www.protocol.http.HttpURLConnection)
at peacemap.coorshare.search.LocalSearch.getInfoFromService(LocalSearch.java:163)
at peacemap.coorshare.search.LocalSearch.doGet(LocalSearch.java:80)
at peacemap.coorshare.search.LocalSearch.doPost(LocalSearch.java:141)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:662)
   Locked ownable synchronizers:
- None
"http-8080-6" daemon prio=6 tid=0x183bcc00 nid=0x6f48 runnable [0x1953f000]
   java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:129)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:258)
at java.io.BufferedInputStream.read(BufferedInputStream.java:317)
- locked <0x09b2c688> (a java.io.BufferedInputStream)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:687)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:632)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1195)
- locked <0x09b2c728> (a sun.net.www.protocol.http.HttpURLConnection)
at peacemap.coorshare.search.LocalSearch.getInfoFromService(LocalSearch.java:163)
at peacemap.coorshare.search.LocalSearch.doGet(LocalSearch.java:80)
at peacemap.coorshare.search.LocalSearch.doPost(LocalSearch.java:141)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:662)
   Locked ownable synchronizers:
- Nonejavatomcat多线程

Answer 1

仔细查下程序，参考：http://victorzhzh.iteye.com/blog/1021609

Answer 2

您好，下面是我的代码实现，您看有问题吗？谢谢package peacemap.coorshare.search;import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.Reader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class test extends HttpServlet { public test() {
super();
} public void destroy() {
super.destroy();
} public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String url = "http://localhost:8080/solr/select/?q=name%3A%E8%B4%B5%E5%B7%9E&version=2.2&start=0&rows=10&indent=on&wt=json";
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
PrintWriter printWriter = response.getWriter();
String returnStr=getInfoFromService(url);
System.out.println(returnStr);
printWriter.write(returnStr);
printWriter.close();
} private String getInfoFromService(String url) {
String resultStr = "";
try {
URL destURL = new URL(url);
HttpURLConnection urlConn = (HttpURLConnection) destURL
.openConnection();
urlConn.setRequestMethod("GET");
urlConn.setDoOutput(true);
urlConn.setDoInput(true);
urlConn.setUseCaches(false);
InputStreamReader inStream = new InputStreamReader(urlConn
.getInputStream(), "utf-8");
resultStr = getRequestContent(inStream);
inStream.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (ProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return resultStr;
} private String getRequestContent(Reader reader) throws IOException {
StringBuffer sb = null;
sb = new StringBuffer();
char[] data = new char[1024];
int i = reader.read(data);
while (i != -1) {
sb.append(data, 0, i);
i = reader.read(data);
}
String sreq = sb.toString();
return sreq;
} public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
} public void init() throws ServletException {
}}