Your code is reading only one input stream (in variable) . Based on
later emails you sent, I believe that is standard out.
Oracle's exp command writes exclusively to stderr. You must read both
streams or your application will block. Below is some sample code.
(please note: we suspect a deadlock in our application when reading
large output of 17MB. The code below may contain that bug so use
as-is at your own risk)
InputStream in = channel.getInputStream();
channel.connect();
InputStream err_in = channel.getExtInputStream();
byte[] tmp = new byte[1024];
while (true) {
while (in.available() > 0) {
int i = in.read(tmp, 0, 1024);
if (i < 0)
break;
stdOut += new String(tmp, 0, i);
}
while (err_in.available() > 0) {
int i = err_in.read(tmp, 0, 1024);
if (i < 0)
break;
stdErr += new String(tmp, 0, i);
}
if (channel.isClosed()) {
break;
}
Thread.sleep(500);
}
Thanks,
Keith
On Tue, Nov 16, 2010 at 11:10 AM, <[email protected]> wrote:
>
> (Resending for the group)..
>
> Hi Alan,
>
> Thanks for the reply.
>
> Yes, I am reading both output and error channel. I have run the following
> commands in the server and both print fine, i.e., all the characters are
> printed. Moreover i could observe in the code that the input buffer has no
> content in it AND the channel is never closed. Please note my source code
> below which is just exactly as suggested in the example files.
>
> StringBuilder tmpBuf = new StringBuilder();
> byte[] tmp = new byte[1024];
> while (true) {
> while (in.available() > 0) {
> int i = in.read(tmp, 0, 1024);
> if (i < 0)
> break;
> String resp = new String(tmp, 0, i);
> tmpBuf.append(resp);
> }
> if (channel.isClosed()) {
> in.close();
> break;
> }
> //for debug, if miss isClosed()
> if( !channel.isClosed() && channel.getExitStatus() == 0 ){
> System.out.println("before close exit-status changed!" );
> }
> }
>
> Here, the inputstream 'in', after few cycles, is returning no character
> (in.available < 0) and channel.isClosed() is never true.
>
> Please advise.
>
> Regards,
> P.V.R.Kartik
> ________________________________
> From: Keith Alan Richardson [mailto:[email protected]]
> Sent: Tuesday, November 16, 2010 1:14 PM
> To: Kartik Pullabhotla v r (WT01 - GMT-Telecom Equipment)
> Cc: [email protected]
> Subject: Re: [JSch-users] Oracle exp command with jsch
>
> Are you reading the channel stdout and stderr? One or both buffers may fill
> up causing deadlock
>
> SQL*Plus may not produce enough output to fill the buffers but exp might.
>
> You can test if this is your problem by running the following commands :
>
> # print 1MB to stdout
>
> perl -e 'print "x"x(1*1024*1024)'
>
> # print 1MB to sterr
>
> perl -e 'print STDERR "x"x(1*1024*1024)'
>
> On 16 Nov 2010 09:00, <[email protected]> wrote:
>
>
> (Resending this since i haven't received any acknowlegement or the copy)
>
>
> Hi Team,
>
> We have a project here whose primary purpose is to call a script on a unix
> server from...
>
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Beautiful is writing same markup. Internet Explorer 9 supports
standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3.
Spend less time writing and rewriting code and more time creating great
experiences on the web. Be a part of the beta today
http://p.sf.net/sfu/msIE9-sfdev2dev
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