已为此响应调用 Grails getOutputStream()答案

【问题标题】：Grails getOutputStream() has already been called for this response已为此响应调用 Grails getOutputStream()
【发布时间】：2013-08-19 08:33:21
【问题描述】：

我的控制器中有这个方法。 Whick 基本上呈现 pdf 文件。

    def getUserInvoiceImage (GetInvoiceDataCommand form) {
        byte[] pdf = invoiceImageService.getUserInvoiceImage(form.invoiceId)
        response.setContentType('application/pdf')
        response.outputStream << pdf;
        response.outputStream.close()
        return false;
    }

当我双击它时，它工作正常。但是当我折叠并展开我的面板时，会发生以下异常。

    Software caused connection abort: socket write error. Stacktrace follows:
java.net.SocketException: Software caused connection abort: socket write error
    at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
    at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
    at net.bull.javamelody.FilterServletOutputStream.write(FilterServletOutputStream.java:64)
    at net.bull.javamelody.CounterResponseStream.write(CounterResponseStream.java:75)
    at com.tieto.msi.InvoiceImageController.getUserInvoiceImage(InvoiceImageController.groovy:13)
    at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:195)
    at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63)
    at net.bull.javamelody.JspWrapper.invoke(JspWrapper.java:151)
    at net.bull.javamelody.JdbcWrapper$DelegatingInvocationHandler.invoke(JdbcWrapper.java:271)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:206)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:179)
    at jcifs.http.NtlmHttpFilter.doFilter(NtlmHttpFilter.java:154)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
    at java.lang.Thread.run(Thread.java:662)
2013-08-19 12:43:15,636 ERROR KULDARIM org.codehaus.groovy.grails.web.errors.GrailsExceptionResolver: IllegalStateException occurred when processing request: [GET] /MySupplierInvoices/invoiceImage/getUserInvoiceImage - parameters:
invoiceId: 5274216
getOutputStream() has already been called for this response. Stacktrace follows:
org.codehaus.groovy.grails.web.pages.exceptions.GroovyPagesException: Error processing GroovyPageView: getOutputStream() has already been called for this response
    at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:195)
    at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63)
    at net.bull.javamelody.JspWrapper.invoke(JspWrapper.java:151)
    at net.bull.javamelody.JdbcWrapper$DelegatingInvocationHandler.invoke(JdbcWrapper.java:271)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:206)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:179)
    at jcifs.http.NtlmHttpFilter.doFilter(NtlmHttpFilter.java:154)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
    at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.IllegalStateException: getOutputStream() has already been called for this response
    at net.bull.javamelody.FilterServletResponseWrapper.getWriter(FilterServletResponseWrapper.java:121)
    at C__Dev_MyApps_MySupplierInvoices_grails_app_views_error500_gsp.run(error500.gsp:1)
    ... 10 more
2013-08-19 12:43:15,639 WARN   grails.plugin.cache.web.filter.simple.MemoryPageFragmentCachingFilter: Throwable thrown during doFilter on request with URI: /MySupplierInvoices/grails/invoiceImage/getUserInvoiceImage.dispatch and Query: invoiceId=5274216 : Request processing failed; nested exception is org.codehaus.groovy.grails.web.pages.exceptions.GroovyPagesException: Error processing GroovyPageView: getOutputStream() has already been called for this response
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.codehaus.groovy.grails.web.pages.exceptions.GroovyPagesException: Error processing GroovyPageView: getOutputStream() has already been called for this response
    at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:195)
    at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63)
    at net.bull.javamelody.JspWrapper.invoke(JspWrapper.java:151)
    at net.bull.javamelody.JdbcWrapper$DelegatingInvocationHandler.invoke(JdbcWrapper.java:271)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:206)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:179)
    at jcifs.http.NtlmHttpFilter.doFilter(NtlmHttpFilter.java:154)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
    at java.lang.Thread.run(Thread.java:662)
Caused by: org.codehaus.groovy.grails.web.pages.exceptions.GroovyPagesException: Error processing GroovyPageView: getOutputStream() has already been called for this response
    ... 10 more
Caused by: java.lang.IllegalStateException: getOutputStream() has already been called for this response
    at net.bull.javamelody.FilterServletResponseWrapper.getWriter(FilterServletResponseWrapper.java:121)
    at C__Dev_MyApps_MySupplierInvoices_grails_app_views_error500_gsp.run(error500.gsp:1)
    ... 10 more
2013-08-19 12:43:15,640 ERROR  org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/MySupplierInvoices].[grails]: Servlet.service() for servlet grails threw exception
java.lang.IllegalStateException: getOutputStream() has already been called for this response
    at net.bull.javamelody.FilterServletResponseWrapper.getWriter(FilterServletResponseWrapper.java:121)
    at C__Dev_MyApps_MySupplierInvoices_grails_app_views_error500_gsp.run(error500.gsp:1)
    at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:195)
    at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63)
    at net.bull.javamelody.JspWrapper.invoke(JspWrapper.java:151)
    at net.bull.javamelody.JdbcWrapper$DelegatingInvocationHandler.invoke(JdbcWrapper.java:271)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:206)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:179)
    at jcifs.http.NtlmHttpFilter.doFilter(NtlmHttpFilter.java:154)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
    at java.lang.Thread.run(Thread.java:662)
2013-08-19 12:43:15,642 ERROR  org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/MySupplierInvoices].[default]: Servlet.service() for servlet [default] in context with path [/MySupplierInvoices] threw exception [org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.codehaus.groovy.grails.web.pages.exceptions.GroovyPagesException: Error processing GroovyPageView: getOutputStream() has already been called for this response] with root cause
java.lang.IllegalStateException: getOutputStream() has already been called for this response
    at net.bull.javamelody.FilterServletResponseWrapper.getWriter(FilterServletResponseWrapper.java:121)
    at C__Dev_MyApps_MySupplierInvoices_grails_app_views_error500_gsp.run(error500.gsp:1)
    at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:195)
    at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63)
    at net.bull.javamelody.JspWrapper.invoke(JspWrapper.java:151)
    at net.bull.javamelody.JdbcWrapper$DelegatingInvocationHandler.invoke(JdbcWrapper.java:271)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:206)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:179)
    at jcifs.http.NtlmHttpFilter.doFilter(NtlmHttpFilter.java:154)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
    at java.lang.Thread.run(Thread.java:662)

我已经阅读了很多关于这个问题的信息，但没有一个解决方案对我有帮助。所以如果我做错了什么或者我想要达到的这种行为是不可能的，我会有点困惑。

【问题讨论】：

似乎 Grails 会在您执行操作后尝试渲染 /views/error500.gsp
检查输出中是否还有其他错误
我已经更新了我得到的堆栈跟踪
去掉response.outputStream.close()和return false;这两行
没有任何改变，同样的错误

标签： grails extjs

【解决方案1】：

response.outputStream << pdf;

此代码将自动刷新您的响应，因此无需在后面添加close()。将您的代码更改为：

def getUserInvoiceImage (GetInvoiceDataCommand form) {
    byte[] pdf = invoiceImageService.getUserInvoiceImage(form.invoiceId)
    response.setContentType('application/pdf')
    response.outputStream << pdf;
}

【讨论】：

【解决方案2】：

我认为您的面板正在使用 ajax 请求来获取 pdf，当面板折叠和展开时再次发生 ajax 请求。

Also see this question and answer

【讨论】：

感谢您的建议，但您的代码仍然出现同样的错误
为什么对双 ajax 请求不利？如果我双击按钮，那么也会弹出双 ajax 请求。
我没有说双 ajax 请求不好，我提到了为什么再次调用 getUserInvoiceImage 操作.. 问题出在您的服务器端而不是客户端

【解决方案3】：

表示您的文件未找到
你打电话给flush，这就是为什么没有抛出该消息的原因。
注释指令包括flush 调用以查看错误消息。
如果是这样，请管理您的文件存在，然后取消注释 flush 调用。

【讨论】：