Java 使用camel exec组件调用批处理文件时获取IOException

我正在使用的基本实现在windows环境中调用批处理文件。每当批处理文件执行失败并返回非零退出代码以及一些错误消息时，我的路由工作正常。但只要执行成功，它就会抛出IOException，如下所示

org.apache.camel.component.exec.ExecException: Unable to execute command ExecCommand [args=[/C, d:\file.bat, test_request.xml, null], executable=cmd, timeout=5000, outFile=null, workingDir=null, useStderrOnEmptyStdout=false]
at org.apache.camel.component.exec.impl.DefaultExecCommandExecutor.execute(DefaultExecCommandExecutor.java:81)
at org.apache.camel.component.exec.ExecProducer.process(ExecProducer.java:46)
at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61)
at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:120)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:72)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:398)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:118)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:80)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191)
at org.apache.camel.component.jetty.CamelContinuationServlet.service(CamelContinuationServlet.java:150)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:503)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:429)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:366)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)
at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:982)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1043)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240)
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: Stream Closed
    at java.io.FileOutputStream.writeBytes(Native Method)
    at java.io.FileOutputStream.write(Unknown Source)
    at java.io.BufferedOutputStream.flushBuffer(Unknown Source)
    at java.io.BufferedOutputStream.flush(Unknown Source)
    at java.io.FilterOutputStream.close(Unknown Source)
    at org.apache.commons.exec.DefaultExecutor.closeStreams(DefaultExecutor.java:288)
    at org.apache.commons.exec.DefaultExecutor.executeInternal(DefaultExecutor.java:364)
    at org.apache.commons.exec.DefaultExecutor.execute(DefaultExecutor.java:160)
    at org.apache.commons.exec.DefaultExecutor.execute(DefaultExecutor.java:147)
    at org.apache.camel.component.exec.impl.DefaultExecCommandExecutor.execute(DefaultExecCommandExecutor.java:67)
    ... 30 more

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奇怪的是，每当我从EclipseIDE内部运行我的jar时，一切都很正常。但是，每当我使用“java-jar”从命令提示符部署它时，只有在批处理文件处理成功完成的情况下，它才会给出上述异常。通过大量的研究，我发现这个问题与java运行时使用的流有关，但我无法找到根本原因。我尝试在camel EXEC中使用ExecBinding.EXEC_命令_out_文件提供out文件，但这并没有解决我的问题

问题在于我调用camel exec的方式。我用的是-

cmd /C <path_to_batch_file> param

cmd/C参数

在深入研究这个问题后，我意识到/C将创建一个新的命令提示符实例，执行它，然后销毁该进程。这是关闭某个地方的流，并导致camel抛出异常。解决方案是使用/K开关，它会将控件返回到运行时

cmd /K <path_to_batch_file> param

cmd/K参数