运行时出现Unknown Source的问题

本文介绍了一种常见的情况,在使用自定义打包的Java类库时遇到UnknownSource错误,无法进行有效的源代码级调试。文章详细分析了问题的原因,并提供了解决方案,即在Ant打包脚本中添加debug属性。

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问题描述:

      有一个web工程以来于几个java工程,发布时,需要将几个java工程达成jar包放到web工程,运行期间突然抛出异常,异常恰好时其中一个java工程的一个类抛出来的,但是抛出的异常信息里面含有Unknown Source,看不出异常发生在该类的哪个方法哪一行。打开jar中的该类,关联jar的源代码,设置断点,发现断点不起作用,怎么都没进去。

 

问题分析:

      怀疑1:开源的jar是不是也有这个问题,试过后发现开源的jar没有这个问题。

      怀疑2:自己打的jar包有问题,能够运行但不能调试,根据“Unknown Source“关键字到网上搜索一下,最终发现了问题所在。是ant打包时没有加一些属性导致的。

 

解决方法:

 

在ant的打包脚本上添加debug="true" debuglevel="source,lines,vars",具体如下:

 

 

<javac destdir="${build.classes}" srcdir="${src.java}"
classpathref="lib.classpath" encoding="utf-8" 
debug="true" debuglevel="source,lines,vars"/>
我在运行anylogic的模型,发生了以下错误:离散事件执行出现异常: root.?<PMLSettings>.rackDescriptors[1]: The network must be defined for pallet rack 'palletRack2' java.lang.RuntimeException: root.?<PMLSettings>.rackDescriptors[1]: The network must be defined for pallet rack 'palletRack2' at com.anylogic.engine.Engine.error(Unknown Source) at com.anylogic.engine.Agent.error(Unknown Source) at com.anylogic.engine.Utilities.error(Unknown Source) at com.anylogic.libraries.processmodeling.RackDescriptor_xjal.onStartup(Unknown Source) at com.anylogic.engine.Agent.i(Unknown Source) at com.anylogic.engine.Agent.start(Unknown Source) at com.anylogic.libraries.processmodeling.PMLSettings.add_rackDescriptors(Unknown Source) at com.anylogic.libraries.processmodeling.PMLSettings.getPalletRackDescriptor_xjal(Unknown Source) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at com.anylogic.engine.markup.PalletRack.n(Unknown Source) at com.anylogic.engine.markup.PalletRack.getFreeCell(Unknown Source) at com.anylogic.libraries.processmodeling.RackStore.c(Unknown Source) at com.anylogic.libraries.processmodeling.RackStore.b(Unknown Source) at com.anylogic.libraries.processmodeling.RackStore$1.onEnter(Unknown Source) at com.anylogic.libraries.processmodeling.SelectOutput.a(Unknown Source) at com.anylogic.libraries.processmodeling.SelectOutput$3.onExit(Unknown Source) at com.anylogic.libraries.processmodeling.OutputBlock.c(Unknown Source) at com.anylogic.libraries.processmodeling.OutputBlock$1.b(Unknown Source) at com.anylogic.libraries.processmodeling.OutPort.a(Unknown Source) at com.anylogic.libraries.processmodeling.InPort.receiveImmediately(Unknown Source) at com.anylogic.libraries.processmodeling.InputBlock$1.a(Unknown Source) at 我该怎么解决
最新发布
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java.lang.RuntimeException: 错误代码:11300001 数据集配置错误 Query: 错误代码:11300001 数据集配置错误 java.sql.SQLException: ORA-08103: object no longer exists at com.fr.report.core.lkd.BW.dealWithBEDSColumn(Unknown Source) at com.fr.report.core.lkd.KW.cc_ce_array(Unknown Source) at com.fr.report.core.lkd.BW.lkwohzplhlWA(Unknown Source) at com.fr.report.core.lkd.BW.myNse(Unknown Source) at com.fr.report.core.lkd.BW.lkwohzpjvUxdeYgajcmt$original$MCH75ktL(Unknown Source) at com.fr.report.core.lkd.BW.lkwohzpjvUxdeYgajcmt$original$MCH75ktL$accessor$2jITPd5L(Unknown Source) at com.fr.report.core.lkd.BW$auxiliary$VZpXT3Zm.call(Unknown Source) at com.fr.report.core.ExceptionLocateInterceptor.intercept(Unknown Source) at com.fr.report.core.lkd.BW.lkwohzpjvUxdeYgajcmt(Unknown Source) at com.fr.report.core.lkd.BW.lkwohzplxWzhi(Unknown Source) at com.fr.report.core.lkd.BW._oiqpiiw_wvh(Unknown Source) at com.fr.report.core.lkd.BW._oiqpmmy(Unknown Source) at com.fr.report.core.lkd.BW.execute4Expand(Unknown Source) at com.fr.report.core.lkd.BW.execute(Unknown Source) at com.fr.report.worksheet.WorkSheet.execute(Unknown Source) at com.fr.report.core.sheet.AbstractWorkBookExecutor._execute(Unknown Source) at com.fr.report.core.sheet.AbstractWorkBookExecutor.execute(Unknown Source) at com.fr.main.impl.WorkBook.execute(Unknown Source) at com.fr.stable.AbstractActor.getResultBookFromCacheIfNeed(Unknown Source) at com.fr.main.impl.WorkBookTemplateDelegate.execute(Unknown Source) at com.fr.web.core.ReportSessionIDInfor.execute(Unknown Source) at com.fr.web.core.ReportSessionIDInfor.computeBook2Show$original$7tL6bK9K(Unknown Source) at com.fr.web.core.ReportSessionIDInfor.computeBook2Show$original$7tL6bK9K$accessor$zS7LkCXv(Unknown Source) at com.fr.web.core.ReportSessionIDInfor$auxiliary$9Ue5y999.call(Unknown Source) at com.fr.intelli.metrics.MonitorInterceptor.intercept(Unknown Source) at com.fr.web.core.ReportSessionIDInfor.computeBook2Show(Unknown Source) at com.fr.web.core.ReportSessionIDInfor.initBook2Show(Unknown Source) at com.fr.web.core.ReportSess
06-10
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