[JSch-users] Help on openChannel("exec")

[sodiska s. <so...@ho...>]

Hi,
     I am trying to implement an apps that send multiple commands one at a time to a remote system. However, after I execute the first command, I get error. From the debug trace, the error found:
DEBUG: Caught an exception, leaving main loop due to End of IO Stream ReadDEBUG: Disconnecting from cheesoon.revenuenetwork.net port 22

Below is part of the codes. Summary of my codes is that my second command, I re-initiate channel object and re-used the session object. Is that the right way to things? I test it and its not working says session has been closed due to the above DEBUG reason. If I re-initiate the session, then its ok. Is this the right way?


//FIRST commandSession session=jsch.getSession(user, host, 22);    session.connect();
command = "display version";      Channel channel=session.openChannel("exec");      ((ChannelExec)channel).setCommand(command);           channel.setInputStream(null);      ((ChannelExec)channel).setErrStream(System.err);      InputStream in=channel.getInputStream();      OutputStream out = channel.getOutputStream();      String versionDesc = null;      String outgoing = null;      String temp = null;            channel.connect();      byte[] tmp=new byte[1024];      while(true){        while(in.available()>0){          int i=in.read(tmp, 0, 1024);          if(i<0)         break;          temp = new String(tmp, 0, i);         if (versionDesc == null) {         temp.replaceAll("^\\s+", "");         temp.replaceAll("^(\\r\\n)+", "");         versionDesc = temp;         System.out.println(versionDesc);         } else         versionDesc += temp;          outgoing = new String (" "); // keeps listing the config values          out.write(outgoing.getBytes());          out.flush();        }        if(channel.isClosed()){          if(in.available()>0) continue;          System.out.println("exit-status: "+channel.getExitStatus());          break;        }        try{Thread.sleep(1000);}catch(Exception ee){}      }      channel.disconnect();      //session.disconnect();
//SECOND COMMANDcommand = "display current configuration";      Channel channel=session.openChannel("exec");      ((ChannelExec)channel).setCommand(command);           channel.setInputStream(null);      ((ChannelExec)channel).setErrStream(System.err);      InputStream in=channel.getInputStream();      OutputStream out = channel.getOutputStream();      String versionDesc = null;      String outgoing = null;      String temp = null;            channel.connect();      byte[] tmp=new byte[1024];      while(true){        while(in.available()>0){          int i=in.read(tmp, 0, 1024);          if(i<0)         break;          temp = new String(tmp, 0, i);         if (versionDesc == null) {         temp.replaceAll("^\\s+", "");         temp.replaceAll("^(\\r\\n)+", "");         versionDesc = temp;         System.out.println(versionDesc);         } else         versionDesc += temp;          outgoing = new String (" "); // keeps listing the config values          out.write(outgoing.getBytes());          out.flush();        }        if(channel.isClosed()){          if(in.available()>0) continue;          System.out.println("exit-status: "+channel.getExitStatus());          break;        }        try{Thread.sleep(1000);}catch(Exception ee){}      }