There is a well known uhhh "operating anomaly" in Runtime.exec() related to
Process errorstream and outstream. The javadocs:
Because some native platforms only provide limited buffer size for standard
input and output streams, failure to promptly write the input stream or read
the output stream of the subprocess may cause the subprocess to block, and
even deadlock.
Actually, in practice, on NT/Solaris these buffers are very small and if you
don't clear them the subprocess absolutely will block and can hang the
invoking JVM. This means that if the execed process does any significant
stdout/stderr your are quickly hosed, as there is no reliable (sensible) way
to guarantee "promptly read"ing these streams before they fill their
buffers. We use Java Runtime.exec() to run other Java programs, so these
other java programs must produce no stderr/out.
>From: Ceki Gülcü <[EMAIL PROTECTED]>
>Reply-To: "LOG4J Users Mailing List" <[EMAIL PROTECTED]>
>To: "LOG4J Users Mailing List" <[EMAIL PROTECTED]>
>Subject: Re: irrepressible messages
>Date: Thu, 15 Mar 2001 18:38:02 +0100
>
>
>The only solution I see is to modify LogLog to write somewhere else. We
>could introduce a method, say setErrorStream, to LogLog so that you could
>redirect the output stream for LogLog.error and LogLog.warn. By the way,
>why is it so important for you to suppress all output even errors? Ceki
>
>
>At 17:14 15.03.2001 +0000, Joseph Panico wrote:
> >Folks,
> >
> >We have a requirement that some java processes must run without producing
>*any* output on stderr or stdout under any circumstances. Unfortunately,
>LogLog prints to stderr in the error method, even if internal debugging is
>disabled. We must have the ability to make a JVM "run silent".
> >
> >joe
>
>
>I hope to see you at my ApacheCon 2001 presentation
>entitled "Log4j, A Logging Package for Java".
>
>See http://ApacheCon.Com/2001/US/ for more details.
>
>----
>Ceki Gülcü Web: http://qos.ch
>av. de Rumine 5 email: [EMAIL PROTECTED] (preferred)
>CH-1005 Lausanne [EMAIL PROTECTED]
>Switzerland Tel: ++41 21 351 23 15
>
>
>---------------------------------------------------------------------
>To unsubscribe, e-mail: [EMAIL PROTECTED]
>For additional commands, e-mail: [EMAIL PROTECTED]
>
_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
