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From "Chris Price (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (EXEC-102) "Stream closed" error in Java 8 when passing input to processes that don't consume it
Date Wed, 27 Jan 2016 22:39:39 GMT

    [ https://issues.apache.org/jira/browse/EXEC-102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15120319#comment-15120319
] 

Chris Price commented on EXEC-102:
----------------------------------

{{/bin/ls}} and {{/bin/pwd}} also fail, corroborating the hypothesis that it has to do with
commands that don't read STDIN.

> "Stream closed" error in Java 8 when passing input to processes that don't consume it
> -------------------------------------------------------------------------------------
>
>                 Key: EXEC-102
>                 URL: https://issues.apache.org/jira/browse/EXEC-102
>             Project: Commons Exec
>          Issue Type: Bug
>    Affects Versions: 1.3
>            Reporter: Chris Price
>
> When trying to pass an InputStream to a process (i.e. for it to be used as STDIN), I
am getting an IOException in Java 8 that I did not get in Java 7.
> We have observed this behavior with both Oracle JDK8 and OpenJDK8, and on various Red
Hat Linux and Ubuntu Linux systems, and also on Mac OSX.
> Here is a simple reproducer:
> {code}
> package foo;
> import org.apache.commons.exec.CommandLine;
> import org.apache.commons.exec.DefaultExecutor;
> import org.apache.commons.exec.Executor;
> import org.apache.commons.exec.PumpStreamHandler;
> import java.io.ByteArrayInputStream;
> import java.io.ByteArrayOutputStream;
> import java.io.IOException;
> public class CommonsExecBinTrue {
>     public static void main(String[] args) throws IOException {
>         Executor exec = new DefaultExecutor();
>         CommandLine cl = new CommandLine("/bin/true");
>         String text = "hello";
>         ByteArrayInputStream input =
>                 new ByteArrayInputStream(text.getBytes("UTF-8"));
>         ByteArrayOutputStream output = new ByteArrayOutputStream();
>         exec.setStreamHandler(new PumpStreamHandler(output, null, input));
>         exec.execute(cl);
>         System.out.println("result: " + output.toString("UTF-8"));
>     }
> }
> {code}
> This program would work fine in Java 7, but in Java 8 it fails with this stack trace:
> {code}
> Exception in thread "main" java.io.IOException: Stream closed
> 	at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433)
> 	at java.io.OutputStream.write(OutputStream.java:116)
> 	at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
> 	at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
> 	at java.io.FilterOutputStream.close(FilterOutputStream.java:158)
> 	at org.apache.commons.exec.DefaultExecutor.closeProcessStreams(DefaultExecutor.java:306)
> 	at org.apache.commons.exec.DefaultExecutor.executeInternal(DefaultExecutor.java:387)
> 	at org.apache.commons.exec.DefaultExecutor.execute(DefaultExecutor.java:166)
> 	at org.apache.commons.exec.DefaultExecutor.execute(DefaultExecutor.java:153)
> 	at foo.CommonsExecBinTrue.main(CommonsExecBinTrue.java:27)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:497)
> 	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
> {code}



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