java.lang.NullPointerException: null

There are no available Samebug tips for this exception. Do you have an idea how to solve this issue? A short tip would help users who saw this issue last week.

  • 获得连接异常
    via GitHub by githublaohu
    ,
  • 最新评论 - youzhibing2904 - 博客园
    via by Unknown author,
  • GitHub comment 1351#236543769
    via GitHub by Amous-th
    ,
  • GitHub comment 1351#236546608
    via GitHub by 89333367
    ,
    • java.lang.NullPointerException: null at com.alibaba.druid.pool.vendor.MySqlValidConnectionChecker.<init>(MySqlValidConnectionChecker.java:50)[druid-1.0.18.jar:1.0.18] at com.alibaba.druid.pool.DruidDataSource.initValidConnectionChecker(DruidDataSource.java:944)[druid-1.0.18.jar:1.0.18] at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:659)[druid-1.0.18.jar:1.0.18] at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:986)[druid-1.0.18.jar:1.0.18] at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:982)[druid-1.0.18.jar:1.0.18] at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:102)[druid-1.0.18.jar:1.0.18] at com.github.pagehelper.PageHelper.getUrl(PageHelper.java:281)[pagehelper-4.1.1.jar:na] at com.github.pagehelper.PageHelper.getSqlUtil(PageHelper.java:305)[pagehelper-4.1.1.jar:na] at com.github.pagehelper.PageHelper.initSqlUtil(PageHelper.java:263)[pagehelper-4.1.1.jar:na] at com.github.pagehelper.PageHelper.intercept(PageHelper.java:250)[pagehelper-4.1.1.jar:na] at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:61)[mybatis-3.3.0.jar:3.3.0] at com.sun.proxy.$Proxy69.query(Unknown Source)[na:na] at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:120)[mybatis-3.3.0.jar:3.3.0] at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:113)[mybatis-3.3.0.jar:3.3.0] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[na:1.8.0_91] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)[na:1.8.0_91] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[na:1.8.0_91] at java.lang.reflect.Method.invoke(Method.java:498)[na:1.8.0_91] at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:386)[mybatis-spring-1.2.3.jar:1.2.3] at com.sun.proxy.$Proxy41.selectList(Unknown Source)[na:na] at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:205)[mybatis-spring-1.2.3.jar:1.2.3] at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:122)[mybatis-3.3.0.jar:3.3.0] at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:64)[mybatis-3.3.0.jar:3.3.0] at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53)[mybatis-3.3.0.jar:3.3.0] at com.sun.proxy.$Proxy54.selectAll(Unknown Source)[na:na] at me.carambola.blog.Application.run(Application.java:33)[main/:na] at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:806)[spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:790)[spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication.java:777)[spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:308)[spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1191)[spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1180)[spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at me.carambola.blog.Application.main(Application.java:27)[main/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[na:1.8.0_91] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)[na:1.8.0_91] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[na:1.8.0_91] at java.lang.reflect.Method.invoke(Method.java:498)[na:1.8.0_91] at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)[spring-boot-devtools-1.3.5.RELEASE.jar:1.3.5.RELEASE]
    No Bugmate found.