- html - 出于某种原因,IE8 对我的 Sass 文件中继承的 html5 CSS 不友好?
- JMeter 在响应断言中使用 span 标签的问题
- html - 在 :hover and :active? 上具有不同效果的 CSS 动画
- html - 相对于居中的 html 内容固定的 CSS 重复背景?
使用 C3P0、OneJar 和 MySQL 时出现死锁C3P0设置如下
pooledDataSource=new ComboPooledDataSource();
set database properies ie userName password driver etc
pooledDataSource.setMaxPoolSize(100);
pooledDataSource.setMinPoolSize(10);
pooledDataSource.setInitialPoolSize(10);
pooledDataSource.setAcquireIncrement(4);
pooledDataSource.setIdleConnectionTestPeriod(900);
pooledDataSource.setTestConnectionOnCheckin(true);
pooledDataSource.setMaxIdleTimeExcessConnections(300);
pooledDataSource.setNumHelperThreads(6);
pooledDataSource.setMaxAdministrativeTaskTime(60);
pooledDataSource.setUnreturnedConnectionTimeout(120);
pooledDataSource.setDebugUnreturnedConnectionStackTraces(true);
**Thread Dump is as follows**
Found one Java-level deadlock:
=============================
"com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#3":
waiting to lock monitor 0x00007f443abe32a0 (object 0x00000000c6071690, a com.simontuffs.onejar.JarClassLoader),
which is held by "main"
"main":
waiting to lock monitor 0x00007f443abe2b68 (object 0x00000000c615e950, a com.simontuffs.onejar.JarClassLoader$1),
which is held by "com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#3"
Java stack information for the threads listed above:
===================================================
"com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#3":
at java.lang.ClassLoader.loadClass(ClassLoader.java:403)
- waiting to lock <0x00000000c6071690> (a com.simontuffs.onejar.JarClassLoader)
at com.simontuffs.onejar.JarClassLoader.loadClass(JarClassLoader.java:630)
at java.lang.ClassLoader.loadClass(ClassLoader.java:410)
- locked <0x00000000c615e950> (a com.simontuffs.onejar.JarClassLoader$1)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at com.simontuffs.onejar.JarClassLoader$1.loadClass(JarClassLoader.java:296)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
- locked <0x00000000c615e950> (a com.simontuffs.onejar.JarClassLoader$1)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at com.simontuffs.onejar.JarClassLoader$1.loadClass(JarClassLoader.java:296)
at com.mysql.jdbc.DatabaseMetaData$9.forEach(DatabaseMetaData.java:5276)
at com.mysql.jdbc.DatabaseMetaData$9.forEach(DatabaseMetaData.java:5239)
at com.mysql.jdbc.IterateBlock.doForAll(IterateBlock.java:50)
at com.mysql.jdbc.DatabaseMetaData.getTables(DatabaseMetaData.java:5238)
at com.mchange.v2.c3p0.impl.DefaultConnectionTester.activeCheckConnectionNoQuery(DefaultConnectionTester.java:185)
at com.mchange.v2.c3p0.impl.DefaultConnectionTester.activeCheckConnection(DefaultConnectionTester.java:62)
at com.mchange.v2.c3p0.AbstractConnectionTester.activeCheckConnection(AbstractConnectionTester.java:67)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.testPooledConnection(C3P0PooledConnectionPool.java:368)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.refurbishResourceOnCheckin(C3P0PooledConnectionPool.java:301)
at com.mchange.v2.resourcepool.BasicResourcePool.attemptRefurbishResourceOnCheckin(BasicResourcePool.java:1606)
at com.mchange.v2.resourcepool.BasicResourcePool.access$200(BasicResourcePool.java:32)
at com.mchange.v2.resourcepool.BasicResourcePool$1RefurbishCheckinResourceTask.run(BasicResourcePool.java:1228)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
"main":
at java.lang.ClassLoader.loadClass(ClassLoader.java:403)
- waiting to lock <0x00000000c615e950> (a com.simontuffs.onejar.JarClassLoader$1)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at com.simontuffs.onejar.JarClassLoader$1.loadClass(JarClassLoader.java:296)
at com.simontuffs.onejar.JarClassLoader.findClass(JarClassLoader.java:642)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
- locked <0x00000000c6071690> (a com.simontuffs.onejar.JarClassLoader)
at com.simontuffs.onejar.JarClassLoader.loadClass(JarClassLoader.java:630)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at org.hibernate.cfg.SettingsFactory.createBatcherFactory(SettingsFactory.java:443)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:195)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2863)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2859)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1870)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:906)
at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:74)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:268)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:310)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1514)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
- locked <0x00000000fa3ce208> (a java.util.concurrent.ConcurrentHashMap)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:591)
- locked <0x00000000fa3ce258> (a java.util.concurrent.ConcurrentHashMap)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:469)
- locked <0x00000000fa3ce358> (a java.lang.Object)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93)
at com.goldensource.activegateway.backoffice.launcher.BackOfficeJobLauncher.sendNotification(BackOfficeJobLauncher.java:464)
at com.goldensource.activegateway.backoffice.launcher.BackOfficeJobLauncher.main(BackOfficeJobLauncher.java:186)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at com.simontuffs.onejar.Boot.run(Boot.java:340)
at com.simontuffs.onejar.Boot.main(Boot.java:166)
Found 1 deadlock.
但是当我使用 jtds 连接 SQL 数据库时,一切正常吗?谁能告诉我出了什么问题吗?
最佳答案
因此,这看起来像是 c3p0 的帮助线程尝试使用 OneJar 类加载器加载类的问题。尝试更新到 c3p0-0.9.5 的最新预发行版(当前为 c3p0-0.9.5-pre6)并将配置属性 contextClassLoaderSource
设置为 library
或 无
。请参阅http://www.mchange.com/projects/c3p0/#contextClassLoaderSource
关于mysql - 使用 C3P0、OneJar 和 MySQL 时出现死锁,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/21987062/
我有类似下面的代码: ... id: myComponent signal updateState() property variant modelList: [] Repeater { mo
我正在处理一些我无法展示的私有(private)代码,但我已经制作了一些示例代码来描述我的问题: 主.c: #include #include #include #include typede
这个问题在这里已经有了答案: 关闭10 年前。 Possible Duplicate: what are the differences in die() and exit() in PHP? 我想
在编写 Perl 模块时,在模块内部使用 croak/die 是一个好习惯吗? 毕竟,如果调用者不使用 eval block ,模块可能会使调用它的程序崩溃。 在这些情况下,最佳做法是什么? 最佳答案
我有一些搜索线程正在存储结果。我知道当线程启动时,JVM native 代码会代理在操作系统上创建新 native 线程的请求。这需要 JVM 之外的一些内存。当线程终止并且我保留对它的引用并将其用作
我刚刚花了很多时间调试一个我追溯到 wantarray() 的问题。 .我已将其提炼为这个测试用例。 (忽略 $! 在这种情况下不会有任何有用信息的事实)。我想知道为什么wantarray在第二个示例
我看到一些代码是这样做的: if(something){ echo 'exit from program'; die; } ...more code 和其他只使用 die 的人: if
我正在尝试将此表格用于: 如果任何 $_POST 变量等于任何其他 $_POST 变量抛出错误。 如果只有几个,那不是问题,但我有大约 20 个左右所以如果我想这样做,我将不得不像这样 但这
每次我运行: hadoop dfsadmin -report 我得到以下输出: Configured Capacity: 0 (0 KB) Present Capacity: 0 (0 KB) DFS
我是一名优秀的程序员,十分优秀!