AI 助理
备案控制台
开发者社区 问答 正文

tomcat线程一直处于RUNNABLE，不接受请求 400 请求报错 

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:
- None

展开
收起
kun坤 2020-05-29 22:50:20 1290 分享 版权

版权声明：本文内容由阿里云实名注册用户自发贡献，版权归原作者所有，阿里云开发者社区不拥有其著作权，亦不承担相应法律责任。具体规则请查看《阿里云开发者社区用户服务协议》和《阿里云开发者社区知识产权保护指引》。如果您发现本社区中有涉嫌抄袭的内容，填写侵权投诉表单进行举报，一经查实，本社区将立刻删除涉嫌侵权内容。

1 条回答
写回答
取消 提交回答
  • kun坤

    网络IO阻塞,HttpURLConnection 启动太多了.######差不多就是这个意思，呵呵######可能是你程序里面任何一个地方的锁死问题。建议在有可能长时间操作的地方使用线程，让http线程能及时释放###### 这个是代码实现，请大家帮看看有啥问题。谢谢了

    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 {
	}

}
    inStream.close();

    流没关闭吧， 试一下把这个放在finally里面 ######这个。。。不是这个问题###### 这个连接没有手动释放掉吧

    finally{
    urlConn.close();
}
    1.大量的并发，导致请求将tomcat的连接数占满。
    1. 每个并发请求线程 需要tomcat连接去访问其他资源String returnStr=getInfoFromService(url);
      导致：每一个请求都在等待tomcat连接而挂起。

    以上纯属猜测，并无依据。 ######嗯，就是这个原因啊######设置下请求超时时间，如果请求超时未处理会导致大量线程在等待 RequestConfig config = RequestConfig.custom().setConnectTimeout(6000).setSocketTimeout(6000).build(); httpPost.setConfig(config);######建议jstack看一下  ######第一个，请强制关闭流；第二个请关闭请求，在做http请求的时候，每次都要调用close，谢谢。

    2020-05-29 22:50:29
    赞同 展开评论
问答分类：
Java 应用服务中间件
问答标签：
线程runnable Tomcat线程 Tomcat请求 线程请求 线程报错
问答地址：
开发者社区 > 开发与运维 > 问答
相关问答
在Pending状态下，如果一个线程请求了X锁（独占锁），而当前有其他线程正在等待S锁（共享锁）
122
1
0
在对象锁中，如果当前有线程持有S锁（共享锁），此时另一个线程请求SNRW锁（共享非排他写锁），请求会
82
1
0
在范围锁中，如果一个线程已经持有了IX锁，此时另一个线程请求S锁，请求会被满足吗？
74
1
0
Lettuce是如何实现单一连接服务于业务线程的并发请求的?
157
1
0
EDAS如何查看Tomcat线程池的线程使用情况
203
1
0
如果线程请求的栈深度大于虚拟机所允许的深度，会发生什么？
68
2
0
modelscope中，要维护一个单线程，等待并发请求组合成batch去推理吗？
67
0
0
云效5个线程，请求工作项的基本信息接口为什么会出现限流？
103
1
0
应用高可用服务AHAS接受请求的线程entry丢到异步线程池处理后怎么调用entry.exit报错？
113
1
0
函数计算，请问下，比如我FC里面是个http接口，接口收到请求后立刻内部开启一个线程处理业务，然后接
90
3
0