Sometimes with the few servers, The data read from input stream and error
stream are 0 bytes causing JSch to hang in read.
The code is as follows:
// Set the command
channel = session.openChannel("exec");
((ChannelExec) channel).setCommand(command);
InputStream in = channel.getInputStream();
InputStream inExt = channel.getExtInputStream();
BufferedReader brErr = new BufferedReader(new InputStreamReader(inExt));
BufferedWriter bufWriter = new BufferedWriter(new
OutputStreamWriter(channel.getOutputStream()));
channel.connect();
// LOOP FOR FIXED TIME PERIOD until data is available
// Changing this code to wait indefinitely until channel is closed is
also hangning since the channel is never gettting closed.
while (fixed time) {
if (channel.isClosed() || data in any stream)
break;
Thread.sleep(100);
}
System.out.println("Stdout Bytes available : " + in.available());
System.out.println("StdErr Bytes available : " + inExt.available());
// The data available here is 0 bytes on both the streams causing the
subsequent read on Stream to hang.
BufferedReader br = new BufferedReader(new InputStreamReader(in));
if (br != null) {
String line = null;
while ((line = br.readLine()) != null){
System.out.println(line);
}
}
Performing ssh directly to the server works well. This problem is while running
with the Jsch code.
Why does the data from servers is 0 bytes on both the streams. How to write
code such that data from servers appear correctly on streams?
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