DynamicJasper问题-无法运行程序“javac”：java.io.IOException:error=24，打开的文件太多

使用DynamicJasper API生成报告时，会引发以下异常。按照我的逻辑，一次执行大约会生成5000到10000份报告。 由于此异常，报告生成异常被完全阻止。请建议如何在不增加ulimit选项的情况下修复此解决方案，因为我们无法根据报告数量增加

net.sf.jasperreports.engine.JRException: Error compiling report java source files : /home/gscsfo/Report_1409558503418_133890.java
com.bnp.scm.services.common.exception.BNPApplicationException: net.sf.jasperreports.engine.JRException: Error compiling report java source files : /home/gscsfo/Report_1409558503418_133890.java

        at com.bnp.scm.services.scheduler.common.SystemLogger.profile(SystemLogger.java:54)
        at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610)
        at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:65)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:621)
        at com.bnp.scm.services.scheduler.events.EmailAlertAttachment$$EnhancerByCGLIB$$3c6f687d.getPDFAttachment(<generated>)
        at com.bnp.scm.services.scheduler.events.ScheduleEmailEvent.processEvent(ScheduleEmailEvent.java:1039)
        at com.bnp.scm.services.scheduler.events.ScheduleEmailEvent$$FastClassByCGLIB$$84dbc7ef.invoke(<generated>)
        at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:191)
        at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:688)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
        at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:80)
        at com.bnp.scm.services.scheduler.common.SystemLogger.profile(SystemLogger.java:54)
        at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610)
        at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:65)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:621)
        at com.bnp.scm.services.scheduler.events.ScheduleEmailEvent$$EnhancerByCGLIB$$f22c0d43.processEvent(<generated>)
        at com.bnp.scm.scheduler.job.handler.EmailNotificationJob.run(EmailNotificationJob.java:52)
        at com.bnp.scm.scheduler.job.AbstractJob.execute(AbstractJob.java:79)
        at com.bnp.scm.scheduler.job.AbstractJob$$FastClassByCGLIB$$d1c345af.invoke(<generated>)
        at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:191)
        at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:688)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
        at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:80)
        at com.bnp.scm.services.scheduler.common.SystemLogger.profile(SystemLogger.java:54)
        at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610)
        at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:65)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:621)
        at com.bnp.scm.scheduler.job.handler.EmailNotificationJob$$EnhancerByCGLIB$$b1534990.execute(<generated>)
        at org.quartz.core.JobRunShell.run(JobRunShell.java:206)
        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:548)
Caused by: net.sf.dynamicreports.report.exception.DRException: net.sf.jasperreports.engine.JRException: Error compiling report java source files : /home/gscsfo/Report_1409558503418_133890.java
        at net.sf.dynamicreports.jasper.builder.JasperReportBuilder.toJasperReport(JasperReportBuilder.java:279)
        at net.sf.dynamicreports.jasper.builder.JasperReportBuilder.toJasperPrint(JasperReportBuilder.java:309)
        at com.bnp.scm.services.scheduler.events.EmailAlertAttachment.getPDFAttachment(EmailAlertAttachment.java:183)
        ... 56 more
Caused by: net.sf.jasperreports.engine.JRException: Error compiling report java source files : /home/gscsfo/Report_1409558503418_133890.java
        at net.sf.jasperreports.engine.design.JRJavacCompiler.compileClasses(JRJavacCompiler.java:89)
        at net.sf.jasperreports.engine.design.JRAbstractClassCompiler.compileUnits(JRAbstractClassCompiler.java:63)
        at net.sf.jasperreports.engine.design.JRAbstractCompiler.compileReport(JRAbstractCompiler.java:188)
        at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:212)
        at net.sf.dynamicreports.jasper.builder.JasperReportBuilder.toJasperReport(JasperReportBuilder.java:276)
        ... 58 more
Caused by: java.io.IOException: Cannot run program "javac": java.io.IOException: error=24, Too many open files
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:460)
        at java.lang.Runtime.exec(Runtime.java:593)
        at java.lang.Runtime.exec(Runtime.java:466)
        at net.sf.jasperreports.engine.design.JRJavacCompiler.compileClasses(JRJavacCompiler.java:58)
        ... 62 more
Caused by: java.io.IOException: java.io.IOException: error=24, Too many open files
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:148)
        at java.lang.ProcessImpl.start(ProcessImpl.java:65)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:453)
        ... 65 more

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当我们开始分析时，我们发现JRJavacCompiler.compileClasses方法中的流没有关闭。请有人确认这是问题/根本原因。如果不是，需要修复哪里。嗨，Ramesh，你解决问题了吗？如果没有，您能否添加所涉及的代码？看起来您正在从文件中打开流，并且这些流在生成报告后从未关闭，但是查看代码会更容易发现问题。如果问题解决了，您能否添加一个答案，说明您是如何解决的？谢谢