[关闭]
@aloxc 2017-12-05T06:39:07.000000Z 字数 8291 阅读 824

mybatis配置sharding-jdbc的一个Cause: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0异常分析

mybatis shading-jdbc

这两天在重构mybatis一段代码的时候，想结合当当网的sharding-jdbc，出现了一个异常，异常堆栈如下

  1. org.apache.ibatis.exceptions.PersistenceException: 
  2. ### Error querying database.  Cause: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
  3. ### The error may exist in class path resource [mapper/notice/notice-setting-mapper.xml]
  4. ### The error may involve xxpackage.bbs.notice.dao.INoticeSettingDao.getSetting
  5. ### The error occurred while handling results
  6. ### SQL: SELECT * FROM bbs_notice_setting WHERE user_id = ? LIMIT 1
  7. ### Cause: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
  9.     at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
  10.     at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:150)
  11.     at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141)
  12.     at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:77)
  13.     at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:82)
  14.     at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53)
  15.     at com.sun.proxy.$Proxy59.getSetting(Unknown Source)
  16. 	at xxpackage.bbs.notice.dao.NoticeSettingDao.getSetting(NoticeSettingDao.java:34)
  17. 	at xxpackage.bbs.notice.dao.NoticeSettingDao$$FastClassBySpringCGLIB$$5e52de10.invoke(<generated>)
  18. 	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
  19. 	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:700)
  20.     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
  21.     at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:80)
  22.     at xxpackage.lib.dynamicDataSource.DynamicDataSourceAspect.doAround(DynamicDataSourceAspect.java:56)
  23.     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  24.     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  25.     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  26.     at java.lang.reflect.Method.invoke(Method.java:498)
  27.     at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)
  28.     at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610)
  29.     at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:65)
  30.     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:161)
  31.     at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:91)
  32.     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
  33.     at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:633)
  34. 	at xxpackage.bbs.notice.dao.NoticeSettingDao$$EnhancerBySpringCGLIB$$f8f6ae68.getSetting(<generated>)
  35. 	at xxpackage.bbs.notice.dao.NoticeSettingDaoTest.getSetting(NoticeSettingDaoTest.java:26)
  36. 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  37. 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  38. 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  39. 	at java.lang.reflect.Method.invoke(Method.java:498)
  40. 	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
  41.     at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
  42.     at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
  43.     at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
  44.     at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
  45.     at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
  46.     at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
  47.     at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
  48.     at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:88)
  49.     at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
  50. 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
  51.     at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
  52.     at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
  53. 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
  54.     at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
  55.     at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
  56.     at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
  57.     at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
  58.     at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
  59.     at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
  60.     at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
  61. 	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
  62. 	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
  63. Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
  64. 	at java.util.ArrayList.rangeCheck(ArrayList.java:653)
  65. 	at java.util.ArrayList.get(ArrayList.java:429)
  66. 	at com.dangdang.ddframe.rdb.sharding.merger.MergeEngine.<init>(MergeEngine.java:56)
  67. 	at com.dangdang.ddframe.rdb.sharding.jdbc.core.statement.ShardingStatement.getResultSet(ShardingStatement.java:252)
  68. 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  69. 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  70. 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  71. 	at java.lang.reflect.Method.invoke(Method.java:498)
  72. 	at org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:69)
  73. 	at com.sun.proxy.$Proxy62.getResultSet(Unknown Source)
  74.     at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getFirstResultSet(DefaultResultSetHandler.java:226)
  75.     at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSets(DefaultResultSetHandler.java:176)
  76.     at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:64)
  77.     at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:79)
  78.     at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:63)
  79.     at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324)
  80.     at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
  81.     at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
  82.     at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)
  83.     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  84.     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  85.     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  86.     at java.lang.reflect.Method.invoke(Method.java:498)
  87.     at org.apache.ibatis.plugin.Invocation.proceed(Invocation.java:49)
  88.     at xxpackage.lib.mybatis.SqlLogIntercept.intercept(SqlLogIntercept.java:65)
  89.     at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:61)
  90.     at com.sun.proxy.$Proxy58.query(Unknown Source)
  91.     at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148)
  92.     ... 52 more

其中spring-mybatis的配置文件中关于sharding-jdbc的分表策略配置如下

  1. <rdb:strategy id="noticeSettingSharding" sharding-columns="user_id"                  algorithm-expression="bbs_notice_setting_${user_id.longValue() / 10000000}"/>
  2. ```
  3. user_id在数据库中是int类型，javabean中也是int类型，这段配置${user_id.longValue() / 10000000}执行的是groovy代码，其意思是分表策略使用user_id整除来分表，那这段执行后的long值，我猜问题就出现在这。
  4. 为了验证我的猜想，把上面的代码调整下
  7. <div class="md-section-divider"></div>
  9. ```xml
  10. <rdb:strategy id="noticeSettingSharding" sharding-columns="user_id"                  algorithm-expression="bbs_notice_setting_${0}"/>

调整后再次执行测试代码，这次没有任何异常，正确的执行了，那确定就是这个配置错误引起的，修改下代码

  1. <rdb:strategy id="noticeSettingSharding" sharding-columns="user_id"
  2.                   algorithm-expression="bbs_notice_setting_${(user_id.longValue()/10000000).toInteger()}"/>

调整后运行测试逻辑代码无误，修改完毕！
x

添加新批注
在作者公开此批注前，只有你和作者可见。
回复批注