2018-01-04 15:02:03,319 ---com.mchange.v2.async.ThreadPoolAsynchronousRunner: com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@4d6c4ebb -- APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks! 先说说APPARENT DEA…

写这篇日记记录一下自己的愚蠢行为. 具体报错如下: 信息: Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 10, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, break…

报错信息:APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks! 在网上查了一下,大部分网友分析是c3p0造成的,我根据网友给出的参数修改了一下我的项目的参数,改好后重新启动,不再报错,稳定性需要观察.原文内容如下: 最近部在生产环境的应用,系统重启后,跑了一天后就挂掉了,每天都是如此,之前一直都是挺稳定的,看了日志报出的错误是: WARN [Timer-8] ThreadPoolAsynchro…

采用c3p0连接池,每次调试程序,第一次访问时(Tomcat服务器重启后再访问)都会出现以下错误,然后连接库需要很长时间,最终是可以连上的,之后再访问就没问题了,请高手们会诊一下,希望能帮小弟解决此问题,不胜感激! 2009-9-27 13:32:26 com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector run警告: com.mchange.v2.async.ThreadPoolAsynchronousRunner…

一,c3p0执行一段时间后报错例如以下 W 07-26_00:58:27 ThreadPoolAsynchronousRunner.java 608 com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@70929ab6 -- APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks! W 07-26_00:58:39 T…

项目进行压力测试的时候,运行大概1小时候,后台抛出以下异常: Nov 9, 2012 1:41:59 AM com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector runWARNING: com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@4b9cafa7 -- APPARENT DEADLOCK!!! Complete Status:…

最近在IDEA中启动Tomcat经常会碰到这个错误,起初.一直没在意,现在碰到的次数多了,就去查看下这个问题,现描述如下: =2018-01-08 14:27:30,216 WARN [com.mchange.v2.async.ThreadPoolAsynchronousRunner] - com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@29165a67 -- APPARENT DEADLOCK!!! Comp…

com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@1035079 -- APPARENT DEADLOCK!!! Complete Status: Managed Threads: 3 Active Threads: 3 Active Tasks: com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@b1cc87 (com.mchange.v2.as…

我是一名软件包工头,哪里有问题就干哪里. 这次是 Oracle 出毛病了,我就临时兼了DBA的职,没办法,谁叫我是工头呢.打开百度就开干. 这次关键词是:APPARENT DEADLOCK!!! 丫的看这三个感叹号,Tomcat真矫情.一个Oracle跑了5年了,毛病多我可以理解,关键是原因太奇葩,我不能接受. 百度之后,发现是 Oracle 的  listener.log 过大引起的(见此文). listener.log 的路径:$ORACLE_HOME\diag\tnslsnr\机器名\li…

Suppose we have two workers. Each worker has an id of 0 and 1. Also suppose that we have jobs arriving all the time, each job has also an identifier 0 or 1 which specifies which worker will have to do this job. I would like to create 2 threads that a…

数据库连接池的几个常见bug: 1.警告: com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@76c7022e -- APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks! 十月 01, 2016 6:28:24 下午 com.mchange.v2.async.ThreadPoolAsynchronousRunne…

1.APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks! 抛出以下异常信息: com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@13067b2 -- APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks! com.…

1 遇到的错误com.mysql.cj.exceptions.InvalidConnectionAttributeException: 四月 17, 2019 10:21:13 上午 com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource getPoolManager 信息: Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncremen…

因为原先使用的c3p0链接池,时常出现:APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks,以及出现线程死锁的情况导致服务器经常需要重启,很是头疼.所以考虑使用Druid 链接池来代替原先的c3p0. Alibaba Druid中文文档 依赖jar包: http://101.110.118.27/central.maven.org/maven2/com/alibaba/druid/0.1.18/…

WARN run, com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@1de6191 -- APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks!WARN run, com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@1de6191…

学习Spring整合Hibernate的知识,新建一个工程,代码结构如下: 按如下步骤整合: 代码如下: hibernate.cfg.xml: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://…

现象描述:我在一个Junit 的测试类中实例化IOC容器 : ac = new ClassPathXmlApplicationContext("applicationContext.xml"); 在另一个SpringMVC的业务层的类中又进行了实例化,ac = new ClassPathXmlApplicationContext("applicationContext.xml"); 也就是说 applicationContext.xml 配置文件被加载了两次. 导致…

Mysql6.0连接中的几个问题 在最近做一些Javaweb整合时,因为我在maven官网查找的资源,使用的最新版,6.0.3,发现MySQL连接中的几个问题,总结如下: 1.Loading class `com.mysql.jdbc.Driver'.This isdeprecated. The new driver class is `com.mysql.cj.jdbc.Driver. 按照书上的教程,写了如下的数据库连接配置: user=root password= driverClass=…

作者:fbysss QQ:溜酒酒吧酒吧吾散 blog:blog.csdn.net/fbysss 声明:本文由fbysss原创,转载请注明出处 背景: 在调试程序的时候,发现数据库訪问相关的环节出现错误: 12:16:40,941  WARN ThreadPoolAsynchronousRunner:608 - com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@1278b126 -- APPARENT DEADLO…

原因分析 查看了Mysql的文档,以及Connector/J的文档以及在线说明发现,出现这种异常的原因是: Mysql服务器默认的"wait_timeout"是8小时,也就是说一个connection空闲超过8个小时,Mysql将自动断开该connection.这就是问题的所在,在C3P0 pools中的connections如果空闲超过8小时,Mysql将其断开,而C3P0并不知道该connection已经失效,如果这时有Client请求connection,C3P0将该失效的Con…

项目进行压力测试的时候,运行大概1小时候,后台抛出以下异常: Nov 9, 2012 1:41:59 AM com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector run WARNING: com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@4b9cafa7 -- APPARENT DEADLOCK!!! Complete Status:…

C3P0是一个开源的JDBC连接池. 在Spring中,C3P0的一些配置,介绍如下(只列了一部分,不是全部) <!-- c3p0连接池配置 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <!-- 用户名--> <property name="user" value="${username…

c3p0数据库连接池的配置文件放在eclipse的src目录下,代码就可以识别. c3p0的配置文件的内容如下: <!-- Uncomment and set any of the optional parameters below --> <!-- See c3p0's docs for more info. --> <!--连接池中保留的最大连接数.默认值: 15 --> <property name="maxPoolSize" value…

Computer Science An Overview _J. Glenn Brookshear _11th Edition activation 激活 parallel processing 并行处理 concurrent processing 并发处理 Each programming language tends to approach the parallel processing paradigm from its own point of view, resulting in di…

一个项目通过c3p0获得连接池,相关代码如下: public class JdbcUtil { // 连接池的核心类 private static ComboPooledDataSource dataSource; //初始化连接池相关参数 static{ try { dataSource = new ComboPooledDataSource(); dataSource.setDriverClass(PropertiesUtil.getValue("jdbcName")); data…

序:这是一篇发表在2003年6月刊的MSDN Magazine的文章,现在已经不能在线阅读,只提供chm下载.讲的是异步请求处理那些事,正是我上一篇博文涉及的东西(BTW,事实上这篇杂志阐述了那么搞然并卵),期间有搜索到这篇文章,很受裨益.担心MS哪么时候不再提供下载以及本地保管不便,所以现在誊上来,作为备份,方便日后回顾. Fritz Onion This article assumes you're familiar with C#, ASP.NET, and MultithreadingL…

source:http://www.journaldev.com/1058/java-deadlock-example-and-how-to-analyze-deadlock-situation Deadlock is a programming situation where two or more threads are blocked forever, this situation arises with at least two threads and two or more resou…

This article describes the Python threading synchronization mechanisms in details. We are going to study the following types: Lock, RLock, Semaphore, Condition, Event and Queue. Also, we are going to look at the Python internals behind those mechanis…

POSIX Threads, usually referred to as pthreads, is an execution model that exists independently from a language, as well as a parallel execution model. It allows a program to control multiple different flows of work that overlap in time. Each flow of…

Replacing Threads with Dispatch Queues To understand how you might replace threads with dispatch queues, first consider some of the ways you might be using threads in your application today: Single task threads. Create a thread to perform a single ta…