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使用hikari cp for mysql驱动程序时,JNDI查找失败

  •  1
  • Kushan  · 技术社区  · 8 年前

    我已将资源信息放入上下文中。我的webapp的META-INF下的xml, 以下是上下文。xml文件

    <?xml version='1.0' encoding='utf-8'?>
    

    <Resource name="jdbc/MysqlHikari" 
        auth="Container"
        factory="com.zaxxer.hikari.HikariJNDIFactory" 
        type="javax.sql.DataSource"
        maximumPoolSize="10" 
        connectionTimeout="10000"
        jdbcUrl="jdbc:mysql://127.0.0.1:3306/testdb?verifyServerCertificate=false&amp;useSSL=true"
        driverClassName="com.cj.mysql.jdbc.Driver"
        dataSource.implicitCachingEnabled="true"
        dataSource.cachePrepStmts="true"
        dataSource.prepStmtCacheSize="250"
        dataSource.prepStmtCacheSqlLimit="2048"
        dataSource.user="root"
        dataSource.password="root" />
    

    目前使用的mysql connector/j版本是6.0.6 java版本为1\u 8\u 161

    我正在尝试使用以下命令执行查找

        try {
    
            Context ctx = new InitialContext();
    
            ds = (HikariDataSource)ctx.lookup("java:/comp/env/jdbc/MysqlHikari");
    
        }catch(Exception e) {
            LOG.error("Error looking up datasource "+e.toString());
        }
    

    这是在init方法内部完成的 但是,查找始终失败,堆栈跟踪如下

    [23-Feb-2018 14:50:48.438] [com.zaxxer.hikari.HikariConfig] [DEBUG] - Driver class com.cj.mysql.jdbc.Driver not found in Thread context class loader WebappClassLoader
    context: Servelet
    delegate: false
    ----------> Parent Classloader:
    java.net.URLClassLoader@13221655
    , trying classloader WebappClassLoader
    context: Servelet
    delegate: false
    ----------> Parent Classloader:
    java.net.URLClassLoader@13221655
    
    [23-Feb-2018 14:50:48.440] [com.zaxxer.hikari.HikariConfig] [ERROR] - Failed to load driver class com.cj.mysql.jdbc.Driver from HikariConfig class classloader WebappClassLoader
    context: Servelet
    delegate: false
    ----------> Parent Classloader:
    java.net.URLClassLoader@13221655
    
    [23-Feb-2018 14:50:48.441] [com.zaxxer.hikari.util.PropertyElf] [ERROR] - Failed to set property driverClassName on target class com.zaxxer.hikari.HikariConfig
    java.lang.reflect.InvocationTargetException: null
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.zaxxer.hikari.util.PropertyElf.setProperty(PropertyElf.java:146)
    at com.zaxxer.hikari.util.PropertyElf.lambda$setTargetFromProperties$0(PropertyElf.java:57)
    at java.util.Hashtable.forEach(Hashtable.java:878)
    at com.zaxxer.hikari.util.PropertyElf.setTargetFromProperties(PropertyElf.java:52)
    at com.zaxxer.hikari.HikariConfig.<init>(HikariConfig.java:135)
    at com.zaxxer.hikari.HikariJNDIFactory.createDataSource(HikariJNDIFactory.java:71)
    at com.zaxxer.hikari.HikariJNDIFactory.getObjectInstance(HikariJNDIFactory.java:59)
    at org.apache.naming.factory.FactoryBase.getObjectInstance(FactoryBase.java:94)
    at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:321)
    at org.apache.naming.NamingContext.lookup(NamingContext.java:841)
    at org.apache.naming.NamingContext.lookup(NamingContext.java:152)
    at org.apache.naming.NamingContext.lookup(NamingContext.java:829)
    at org.apache.naming.NamingContext.lookup(NamingContext.java:152)
    at org.apache.naming.NamingContext.lookup(NamingContext.java:829)
    at org.apache.naming.NamingContext.lookup(NamingContext.java:152)
    at org.apache.naming.NamingContext.lookup(NamingContext.java:829)
    at org.apache.naming.NamingContext.lookup(NamingContext.java:166)
    at org.apache.naming.SelectorContext.lookup(SelectorContext.java:157)
    at javax.naming.InitialContext.lookup(InitialContext.java:417)
    at foodiniq.CheckProValidityServelet.init(CheckProValidityServelet.java:61)
    at javax.servlet.GenericServlet.init(GenericServlet.java:158)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1238)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1151)
    at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:828)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:135)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:748)
    Caused by: java.lang.RuntimeException: Failed to load driver class com.cj.mysql.jdbc.Driver in either of HikariConfig class loader or Thread context classloader
    at com.zaxxer.hikari.HikariConfig.setDriverClassName(HikariConfig.java:512)
    ... 44 common frames omitted
    
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  •  5
  •   Kushan    8 年前

    正如注释所述,我在驱动程序类名中有一个输入错误

    正确名称为:

    com.mysql.cj.jdbc.Driver
    

    相反,我使用的是:

    com.cj.mysql.jdbc.Driver
    

    对于使用connector/j版本5.1或更低版本的用户,正确的类别为:

    com.mysql.jdbc.Driver
    

    对于更高版本,这仍然有效,但它将显示一条警告,说明它已被弃用。因此,只需使用最新版本(撰写本文时),即:

    通用域名格式。mysql。cj。jdbc。驾驶员
    
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