当Tomcat线程被打满时,可以按照以下步骤进行排查:
1. 查看Tomcat的日志文件,特别是错误日志。在日志中搜索关键字,比如"OutOfMemoryError",以确定是否存在内存溢出异常。
2. 检查Tomcat的JVM参数设置,尤其是内存相关的参数,如-Xmx和-Xms。确保这些参数适当设置,以满足应用的需求。如果需要增加内存,可以调整这些参数的值,并重新启动Tomcat。
3. 使用工具(如jmap、jstack等)获取Tomcat的内存快照和线程堆栈信息,以了解线程的状态和运行情况。这些信息可以帮助确定是否存在线程死锁或长时间运行的线程,从而引起了线程池被打满的问题。
4. 检查Tomcat的配置文件,特别是连接器(Connector)的配置。确保连接器的最大线程数(maxThreads)合理设置,可以根据实际需求适当增加或减少线程数。
5. 检查应用程序的代码,特别是与并发相关的代码块。确保没有出现死锁、线程安全问题或无限循环等导致线程被阻塞的情况。可以使用调试器或性能分析工具来定位问题代码段。
6. 监控服务器的系统资源使用情况,如CPU、内存、磁盘等。如果某个资源被耗尽,可能导致Tomcat线程被打满。可以使用监控工具,如Nagios、Zabbix等,来实时监测服务器资源的使用情况,并进行预警和调整。
7. 在Tomcat集群环境中,检查负载均衡器的配置和运行情况,确保请求能够均匀分发到各个Tomcat节点,避免某一节点负载过高。
8. 如果以上步骤仍然无法解决问题,可以尝试升级Tomcat版本或寻求Tomcat官方或社区的支持。他们可能能提供更具体的调试和排查建议。
总之,当Tomcat线程被打满时,需要综合考虑内存、线程、代码和系统资源等多个因素,并通过逐步排查来定位和解决问题。
@Autowired
ServletWebServerApplicationContext applicationContext;
TomcatServletWebServerFactory tomcatServletWebServerFactory=applicationContext.getBean(TomcatServletWebServerFactory.class);
String tomcatLog = (((TomcatWebServer)(tomcatServletWebServerFactory.getWebServer())).getTomcat().getConnector()).getProtocolHandler().getExecutor().toString();
打印结果
org.apache.tomcat.util.threads.ThreadPoolExecutor@2a3ffb6f[Running, pool size = 10, active threads = 0, queued tasks = 0, completed tasks = 0]
@Autowired
ServletWebServerApplicationContext applicationContext;
String tomcatLog = ((TomcatWebServer) applicationContext.getWebServer()).getTomcat().getConnector().getProtocolHandler().getExecutor().toString();
打印结果
org.apache.tomcat.util.threads.ThreadPoolExecutor@3a236dad[Running, pool size = 10, active threads = 1, queued tasks = 0, completed tasks = 0]
@RestController
public class DemoController {
@Autowired
ServletWebServerApplicationContext applicationContext;
@GetMapping("/hs")
public String test(){
TomcatServletWebServerFactory tomcatServletWebServerFactory=applicationContext.getBean(TomcatServletWebServerFactory.class);
String tomcatLog = (((TomcatWebServer)(tomcatServletWebServerFactory.getWebServer())).getTomcat().getConnector()).getProtocolHandler().getExecutor().toString();
return tomcatLog;
}
@GetMapping("/hs2")
public String test2(){
String tomcatLog = ((TomcatWebServer) applicationContext.getWebServer()).getTomcat().getConnector().getProtocolHandler().getExecutor().toString();
return tomcatLog;
}
@GetMapping("/hs3")
public String test3(){
Executor executor = ((TomcatWebServer) applicationContext.getWebServer()).getTomcat().getConnector().getProtocolHandler().getExecutor();
return JSON.toJSONString(executor, SerializerFeature.WriteMapNullValue);
}
}
打印结果
{
"activeCount": 1,
"completedTaskCount": 0,
"corePoolSize": 10,
"largestPoolSize": 10,
"maximumPoolSize": 200,
"poolSize": 10,
"queue": [],
"rejectedExecutionHandler": {},
"shutdown": false,
"submittedCount": 1,
"taskCount": 1,
"terminated": false,
"terminating": false,
"threadFactory": {},
"threadRenewalDelay": 1000
}
SpringBoot版本
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.7.3version>
<relativePath/>
parent>
package com.kang.mongodb.controller;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.web.embedded.tomcat.TomcatWebServer;
import org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.concurrent.Executor;
/**
* @Author Emperor Kang
* @ClassName DemoController
* @Description TODO
* @Date 2023/8/21 19:59
* @Version 1.0
* @Motto 让营地比你来时更干净
*/
@Slf4j
@RestController
@RequestMapping("/tomcat")
public class TomcatController {
@Autowired
ServletWebServerApplicationContext applicationContext;
/**
* localhost:10093/tomcat/getString
* @return
*/
@RequestMapping("/getString")
public String getString() {
try {
Executor executor = ((TomcatWebServer) applicationContext.getWebServer()).getTomcat().getConnector().getProtocolHandler().getExecutor();
log.info("{}-{}",Thread.currentThread().getName(), JSON.toJSONString(executor, SerializerFeature.WriteMapNullValue));
// 将线程挂起3秒,方便观察结果
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return "success";
}
}
server:
port: 10093
tomcat:
accept-count: 5 # 等待队列长度
threads:
min-spare: 10 # 最小工作空闲线程数
max: 20 # 最大线程数
max-connections: 30 # 最大连接数,一个线程可以处理多个连接
SpringBoot内置tomcat默认配置
SpringBoot
内置Tomcat
的配置存放在 spring-configuration-metadata.json
文件中,配置以 server.tomcat
开头
最小工作线程数
{
"name": "server.tomcat.threads.min-spare",
"type": "java.lang.Integer",
"description": "Minimum amount of worker threads:最小工作线程数。",
"sourceType": "org.springframework.boot.autoconfigure.web.ServerProperties$Tomcat$Threads",
"defaultValue": 10
}
# 最小工作空闲线程数,默认10
server.tomcat.threads.min-spare=10
最大工作线程数
{
"name": "server.tomcat.threads.max",
"type": "java.lang.Integer",
"description": "Maximum amount of worker threads:最大工作线程数",
"sourceType": "org.springframework.boot.autoconfigure.web.ServerProperties$Tomcat$Threads",
"defaultValue": 200
}
# 最大工作线程数,默认200
server.tomcat.threads.max=200
最大连接数
{
"name": "server.tomcat.max-connections",
"type": "java.lang.Integer",
"description": "Maximum number of connections that the server accepts and processes at any given time. Once the limit has been reached, the operating system may still accept connections based on the \"acceptCount\" property.",
"sourceType": "org.springframework.boot.autoconfigure.web.ServerProperties$Tomcat",
"defaultValue": 8192
}
服务器在任何给定时间内接受和处理的最大连接数。一旦达到该限制,操作系统仍可根据 “acceptCount” 属性接受连接。
# 最大连接数默认是8192
server.tomcat.max-connections=8192
队列长度
{
"name": "server.tomcat.accept-count",
"type": "java.lang.Integer",
"description": "Maximum queue length for incoming connection requests when all possible request processing threads are in use.",
"sourceType": "org.springframework.boot.autoconfigure.web.ServerProperties$Tomcat",
"defaultValue": 100
}
使用所有可能的请求处理线程时,接收到的连接请求的最大队列长度
# 等待队列长度,默认100
server.tomcat.accept-count=100
总结
参数 | 设置方式 | 默认值 | 含义 |
---|---|---|---|
acceptCount | server.tomcat.accept-count | 100 | 接收队列,实质上是在操作系统已经完成三次握手等待accept的socket队列 |
maxConnections | server.tomcat.max-connections | 8192 | 最大连接数,实质上是指已经accept的socket数量 |
maxThreads | server.tomcat.threads.max | 200 | 用于处理已经accept的socket的线程最大数量 |
connectionTimeout | server.tomcat.connection-timeout | 60000ms | 是指socket连接后或读取报文字节过程中的超时时间 |
keepAliveTimeout | 实现WebServerFactoryCustomizer | 默认取connectionTimeout | 在同一个socket连接,处理完一次http请求后,等待下一次http请求的超时时间 |
MaxKeepAliveRequests | 实现WebServerFactoryCustomizer | 100 | 在同一个socket连接,最大处理http请求数量,达到数量后关闭socket |
线程的生命周期
线程池 的状态 | 说明 |
---|---|
RUNNING | 允许提交并处理任务 |
SHUTDOWN | 不允许提交新的任务,但是会处理完已提交的任务 |
STOP | 不允许提交新的任务,也不会处理阻塞队列中未执行的任务, |
并设置正在执行的线程的中断标志位 | |
TIDYING | 所有任务执行完毕,池中工作的线程数为0,等待执行terminated()勾子方法 |
TERMINATED | terminated()勾子方法执行完毕 |
//获取webServer线程池
ThreadPoolExecutor executor = (ThreadPoolExecutor) ((TomcatWebServer) webServerApplicationContext.getWebServer())
.getTomcat()
.getConnector()
.getProtocolHandler()
.getExecutor();
Map<String, String> returnMap = new LinkedHashMap<>();
returnMap.put("核心线程数", String.valueOf(executor.getCorePoolSize()));
returnMap.put("最大线程数", String.valueOf(executor.getMaximumPoolSize()));
returnMap.put("活跃线程数", String.valueOf(executor.getActiveCount()));
returnMap.put("池中当前线程数", String.valueOf(executor.getPoolSize()));
returnMap.put("历史最大线程数", String.valueOf(executor.getLargestPoolSize()));
returnMap.put("线程允许空闲时间/s", String.valueOf(executor.getKeepAliveTime(TimeUnit.SECONDS)));
returnMap.put("核心线程数是否允许被回收", String.valueOf(executor.allowsCoreThreadTimeOut()));
returnMap.put("提交任务总数", String.valueOf(executor.getSubmittedCount()));
returnMap.put("历史执行任务的总数(近似值)", String.valueOf(executor.getTaskCount()));
returnMap.put("历史完成任务的总数(近似值)", String.valueOf(executor.getCompletedTaskCount()));
returnMap.put("工作队列任务数量", String.valueOf(executor.getQueue().size()));
returnMap.put("拒绝策略", executor.getRejectedExecutionHandler().getClass().getSimpleName());
Tomcat
最大线程数20当请求量小于等于tomcat最大线程数时
tomcat线程池监控日志打印
http-nio-10093-exec-5-{"activeCount":6,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":10,"maximumPoolSize":20,"poolSize":10,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":6,"taskCount":6,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-6-{"activeCount":6,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":10,"maximumPoolSize":20,"poolSize":10,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":6,"taskCount":6,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-1-{"activeCount":6,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":10,"maximumPoolSize":20,"poolSize":10,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":6,"taskCount":6,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-4-{"activeCount":6,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":10,"maximumPoolSize":20,"poolSize":10,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":6,"taskCount":6,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-2-{"activeCount":6,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":10,"maximumPoolSize":20,"poolSize":10,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":6,"taskCount":6,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-3-{"activeCount":6,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":10,"maximumPoolSize":20,"poolSize":10,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":6,"taskCount":6,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-8-{"activeCount":15,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":17,"maximumPoolSize":20,"poolSize":17,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":18,"taskCount":18,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-10-{"activeCount":16,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":16,"maximumPoolSize":20,"poolSize":16,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":16,"taskCount":19,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-7-{"activeCount":15,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":16,"maximumPoolSize":20,"poolSize":16,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":16,"taskCount":16,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-9-{"activeCount":16,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":16,"maximumPoolSize":20,"poolSize":16,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":17,"taskCount":17,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-14-{"activeCount":19,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":19,"maximumPoolSize":20,"poolSize":19,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":19,"taskCount":19,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-13-{"activeCount":19,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":19,"maximumPoolSize":20,"poolSize":19,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":19,"taskCount":19,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-11-{"activeCount":19,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":19,"maximumPoolSize":20,"poolSize":19,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":19,"taskCount":19,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-12-{"activeCount":19,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":19,"maximumPoolSize":20,"poolSize":19,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":19,"taskCount":19,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-15-{"activeCount":19,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":19,"maximumPoolSize":20,"poolSize":19,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":19,"taskCount":19,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-17-{"activeCount":19,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":19,"maximumPoolSize":20,"poolSize":19,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":19,"taskCount":19,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-16-{"activeCount":19,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":19,"maximumPoolSize":20,"poolSize":19,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":19,"taskCount":19,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-18-{"activeCount":19,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":19,"maximumPoolSize":20,"poolSize":19,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":19,"taskCount":19,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-19-{"activeCount":19,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":19,"maximumPoolSize":20,"poolSize":19,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":19,"taskCount":19,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-20-{"activeCount":20,"completedTaskCount":0,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":20,"taskCount":20,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
Tomcat
最大线程数20当请求量大于tomcat最大线程数时
tomcat线程池监控日志打印
http-nio-10093-exec-4-{"activeCount":1,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":10,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":8,"taskCount":40,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-16-{"activeCount":4,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":10,"queue":[{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":14,"taskCount":46,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-17-{"activeCount":4,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":10,"queue":[{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":15,"taskCount":47,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-21-{"activeCount":12,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":15,"queue":[{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":15,"taskCount":47,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-18-{"activeCount":11,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":14,"queue":[{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":15,"taskCount":47,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-1-{"activeCount":16,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":16,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":16,"taskCount":49,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-24-{"activeCount":16,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":16,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":17,"taskCount":49,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-2-{"activeCount":17,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":17,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":17,"taskCount":50,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-20-{"activeCount":17,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":17,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":17,"taskCount":50,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-19-{"activeCount":17,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":17,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":17,"taskCount":50,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-12-{"activeCount":4,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":10,"queue":[{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":17,"taskCount":50,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-13-{"activeCount":17,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":17,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":17,"taskCount":50,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-22-{"activeCount":17,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":17,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":17,"taskCount":50,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-26-{"activeCount":17,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":17,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":17,"taskCount":50,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-25-{"activeCount":17,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":17,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":17,"taskCount":50,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-27-{"activeCount":17,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":17,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":17,"taskCount":50,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-23-{"activeCount":17,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":17,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":17,"taskCount":50,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-30-{"activeCount":20,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":24,"taskCount":57,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-28-{"activeCount":20,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":24,"taskCount":57,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-29-{"activeCount":20,"completedTaskCount":33,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":24,"taskCount":57,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-21-{"activeCount":16,"completedTaskCount":44,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":15,"taskCount":60,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-20-{"activeCount":16,"completedTaskCount":44,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":15,"taskCount":60,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-4-{"activeCount":16,"completedTaskCount":45,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":13,"taskCount":60,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-23-{"activeCount":17,"completedTaskCount":45,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":11,"taskCount":60,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-1-{"activeCount":17,"completedTaskCount":44,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":11,"taskCount":60,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
挑几个典型的说说
并发请求数大于最大连接数:max-connections
tomcat线程池监控日志打印
http-nio-10093-exec-25-{"activeCount":3,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":10,"queue":[{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":8,"taskCount":91,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-26-{"activeCount":5,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":10,"queue":[{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":8,"taskCount":91,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-21-{"activeCount":5,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":10,"queue":[{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":8,"taskCount":91,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-16-{"activeCount":8,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":13,"queue":[{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":13,"taskCount":96,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-13-{"activeCount":8,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":13,"queue":[{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":14,"taskCount":97,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-1-{"activeCount":19,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":22,"taskCount":105,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-20-{"activeCount":19,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":22,"taskCount":105,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-4-{"activeCount":19,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":22,"taskCount":105,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-23-{"activeCount":20,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":26,"taskCount":109,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-2-{"activeCount":20,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":26,"taskCount":109,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-38-{"activeCount":20,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":26,"taskCount":109,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-31-{"activeCount":20,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":26,"taskCount":109,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-36-{"activeCount":20,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":26,"taskCount":109,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-39-{"activeCount":20,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":26,"taskCount":109,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-34-{"activeCount":20,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":26,"taskCount":109,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-32-{"activeCount":20,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":26,"taskCount":109,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-37-{"activeCount":20,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":26,"taskCount":109,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-33-{"activeCount":20,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":26,"taskCount":109,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-35-{"activeCount":20,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":26,"taskCount":109,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-40-{"activeCount":20,"completedTaskCount":83,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":26,"taskCount":109,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-13-{"activeCount":20,"completedTaskCount":88,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":25,"taskCount":113,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-16-{"activeCount":20,"completedTaskCount":88,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":25,"taskCount":113,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-21-{"activeCount":20,"completedTaskCount":88,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":25,"taskCount":113,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-25-{"activeCount":20,"completedTaskCount":88,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":25,"taskCount":113,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-26-{"activeCount":20,"completedTaskCount":88,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":25,"taskCount":113,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-36-{"activeCount":18,"completedTaskCount":105,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":20,"taskCount":126,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-37-{"activeCount":20,"completedTaskCount":100,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":20,"taskCount":127,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-39-{"activeCount":20,"completedTaskCount":100,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":20,"taskCount":126,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-20-{"activeCount":20,"completedTaskCount":99,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{},{},{},{},{},{},{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":23,"taskCount":126,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-38-{"activeCount":16,"completedTaskCount":114,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[{}],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":14,"taskCount":133,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-33-{"activeCount":15,"completedTaskCount":122,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":15,"taskCount":137,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-4-{"activeCount":15,"completedTaskCount":122,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":15,"taskCount":137,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-31-{"activeCount":15,"completedTaskCount":122,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":15,"taskCount":137,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-34-{"activeCount":15,"completedTaskCount":122,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":15,"taskCount":137,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
http-nio-10093-exec-32-{"activeCount":15,"completedTaskCount":122,"corePoolSize":10,"largestPoolSize":20,"maximumPoolSize":20,"poolSize":20,"queue":[],"rejectedExecutionHandler":{},"shutdown":false,"submittedCount":15,"taskCount":137,"terminated":false,"terminating":false,"threadFactory":{},"threadRenewalDelay":1000}
并发请求数大于最大连接数+等待队列大小
Http
请求占用一个连接Http
请求数超过最大连接数时,多出的请求会放入等待队列,如果队列也满了请求会被丢弃。所以Tomcat
能接收的请求数为最大连接数+等待队列长度
。Tomcat
最多能同时处理的请求数,比如有30个请求,但是最大线程数为20,那么同时有20个请求可以被处理Http
请求占用一个连接Http
请求数超过最大连接数时,多出的请求会放入等待队列,如果队列也满了请求会被丢弃。所以Tomcat
能接收的请求数为最大连接数+等待队列长度
。Tomcat
最多能同时处理的请求数,比如有30个请求,但是最大线程数为20,那么同时有20个请求可以被处理