mysql - Tomcat启动时如何避免分钟延迟

Question

我们在许多生产服务器上的服务器启动期间遇到了几分钟的显着延迟，但无法在测试环境中重现此问题。有没有人对如何调试或修复此问题有任何建议？它发生在 Tomcat 6 和 Tomcat 7 上

我们的设置是 Tomcat 7 Spring 3.1.2 休眠 4.1.7 BoneCP 0.7.1 Mysql连接5.1.23 新遗迹

它似乎与Bone CP有关

[MSA] DEBUG [2013-02-18 14:58:34,903] DefaultListableBeanFactory.invokeInitMethods(1498) | Invoking afterPropertiesSet() on bean with name 'dataSource'
[MSA] DEBUG [2013-02-18 14:58:34,919] BoneCPDataSource.maybeInit(148) | JDBC URL = jdbc:mysql://1.1.1.1:3306/db_prod?createDatabaseIfNotExist=true&useUnicode=true&characterEncoding=utf-8&sessionVariables=FOREIGN_KEY_CHECKS=0, Username = xyz, partitions = 3, max (per partition) = 30, min (per partition) = 10, helper threads = 3, idle max age = 3 min, idle test period = 2 min
[MSA] DEBUG [2013-02-18 15:01:11,474] DefaultListableBeanFactory.doGetBean(245) | Returning cached instance of singleton bean 'managerTx'

我们的Bone CP设置如下

<bean id="dataSource"
   class="org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy">
   <property name="targetDataSource">
       <ref local="mainDataSource" />
   </property>
</bean>

<bean id="mainDataSource" class="com.jolbox.bonecp.BoneCPDataSource" destroy-method="close">
    <property name="driverClass" value="${jdbc.driverClassName}"/>
    <property name="jdbcUrl" value="${jdbc.url}"/>
    <property name="username" value="${jdbc.username}"/>
    <property name="password" value="${jdbc.password}"/>
    <property name="idleMaxAgeInMinutes" value="3"/>
    <property name="idleConnectionTestPeriodInMinutes" value="2"/>
    <property name="maxConnectionsPerPartition" value="30"/>
  <property name="minConnectionsPerPartition" value="10"/>
  <property name="partitionCount" value="3"/>
  <property name="acquireIncrement" value="2"/>
  <property name="statementsCacheSize" value="100"/>
  <property name="releaseHelperThreads" value="3"/>
</bean>

基于 Mindas 的建议。这是等待期间发生的事情的堆栈跟踪

"pool-3-thread-1" prio=10 tid=0x00007fd26c004000 nid=0x5c7e runnable   [0x00007fd2c4722000]
java.lang.Thread.State: RUNNABLE
    at java.net.SocketInputStream.socketRead0(Native Method)
    at java.net.SocketInputStream.read(SocketInputStream.java:150)
    at java.net.SocketInputStream.read(SocketInputStream.java:121)
    at com.mysql.jdbc.util.ReadAheadInputStream.fill(ReadAheadInputStream.java:114)
    at com.mysql.jdbc.util.ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(ReadAheadInputStream.java:161)
    at com.mysql.jdbc.util.ReadAheadInputStream.read(ReadAheadInputStream.java:189)
    - locked <0x00000000ccf12490> (a com.mysql.jdbc.util.ReadAheadInputStream)
    at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:3049)
    at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:597)
    at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1084)
    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2465)
    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2498)
    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2283)
    - locked <0x00000000ccf04310> (a com.mysql.jdbc.JDBC4Connection)
    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:822)
    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:404)
    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:317)
    at java.sql.DriverManager.getConnection(DriverManager.java:579)
    at java.sql.DriverManager.getConnection(DriverManager.java:221)
    at com.jolbox.bonecp.BoneCP.obtainRawInternalConnection(BoneCP.java:256)
    at com.jolbox.bonecp.ConnectionHandle.obtainInternalConnection(ConnectionHandle.java:211)
    at com.jolbox.bonecp.ConnectionHandle.<init>(ConnectionHandle.java:170)
    at com.jolbox.bonecp.BoneCP.<init>(BoneCP.java:371)
    at com.jolbox.bonecp.BoneCPDataSource.maybeInit(BoneCPDataSource.java:150)
    at com.jolbox.bonecp.BoneCPDataSource.getConnection(BoneCPDataSource.java:112)
    at org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy.afterPropertiesSet(LazyConnectionDataSourceProxy.java:163)
    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 <0x00000000dc56d780> (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.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:322)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:106)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1360)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1118)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
    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 <0x00000000dc56d780> (a java.util.concurrent.ConcurrentHashMap)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)

Answer 1

发送 kill -3(如果在 Unix 上，或 corresponding signal 如果在 Windows 上)到您的 Tomcat 进程 ID，当它被卡住时。您将在 catalina.out 中看到所有具有完整堆栈跟踪的线程。

编辑:堆栈跟踪快照似乎正处于启动连接的过程中。您能否验证(使用本地 mysql 客户端)您可以毫无延迟地连接(提示:DNS 问题)并快速执行命令——使用与 JDBC 完全相同的配置？