Premature Termination

[michael-hay]

Similar to the other open issue

https://github.com/profesorfalken/jPowerShell/issues/9

I'm seeing that if I open a PSSession and feed it commands it will terminate after it gets the first ouput line instead of waiting for an exit code. So What I'm trying to do is this:

private static String executePowerShellCmd(PowerShell powerShell, String cmd, String timeout) {
    printCmd(cmd);
    Map<String, String> myConfig = new HashMap<>();
    myConfig.put("maxWait", timeout);
    PowerShellResponse response = powerShell.configuration(myConfig).executeCommand(cmd);
    return response.getCommandOutput();
}

public static void executeRemoteSession(String cmd, String automationHome, String serverName, String timeout) throws Exception {
    PowerShell powerShell = null;
    try {
        powerShell = PowerShell.openSession();
        System.out.println(executePowerShellCmd(powerShell, "$s = New-PSSession -ComputerName " + serverName, "10"));
        System.out.println(executePowerShellCmd(powerShell, "Invoke-Command -Session $s {" + cmd + "}", timeout));
        System.out.println(executePowerShellCmd(powerShell, "Get-PsSession -ComputerName  " + serverName + " | Remove-PsSession", "10"));
    } catch(PowerShellNotAvailableException ex) {
        throw new RuntimeException("Failed to run PowerShell", ex);
    } finally {
        if (powerShell != null)
             powerShell.close();
    }
}

So if I try a remote command on another server that may say execute a ps1 script it will not do a p.waitfor() and get me a return code. Your function executeCommand() will terminate on the first output it receives.

I tried the execute script function but that has another issue. It assumes that you are running the script locally on the same server. I'm not. I'm opening a remote PSSession and running a script on a remote server.

I think if you just put in a p.waitfor() in your code that would hold the executeCommand() function till the remote script completes. However I think that will interfere with your ability to timeout. Maybe a new function that does this with no timeout would be in order. Not sure.

I'm using jPowerShell-1.6.2, tried very long timeout values for the Invoke-Command still terminates on first output it receives.

[michael-hay]

Ohhh I see. Since we are doing this

ProcessBuilder pb = new ProcessBuilder("powershell.exe", "-NoExit", "-Command", "-"); p = pb.start();

then feeding it commands, p never actually terminates. So any call to p.waitFor() will never exit. Interesting. Is there a way we could do something like p.waitFor() on each command we are passing to Process p?

[profesorfalken]

Hello, Yes, it is exactly that. With Powershell the problem is that what the process we launch is the powershell interpreter. Then, we send the commands to this process and wait for a result.

There is no return code of the process since the only process we can handle is this of powershell.exe itself.

See the comments in the issue #11

[profesorfalken]

Closed as duplicated