Process fails to quit due to issue in opening and ending logcat

[eliperelman]

Switching over from adbkit-logcat to adbkit, and my Node.js process fails to quit because something in logcat must still be in the stack. Previously this wasn't an issue in adbkit-logcat as it's recommended you kill the stream process upon exit, but I don't see a way to access the logcat process using the mechanisms provided by adbkit. The stream end method does not let the process end. Using the following reduced test case:

var adb = require('adbkit');
var client = adb.createClient();

client.listDevices()
  .then(function(devices) {
    var deviceId = devices[0].id;

    client.openLogcat(deviceId)
      .then(function(logcat) {
        setTimeout(function() {
          console.log('ending logcat');
          logcat.end();
        }, 5000);
      });
  });

[eliperelman]

Running with DEBUG=* shows nothing in the console when .ending the logcat:

adb:command Send '000Chost:devices' +0ms
adb:command Send '0017host:transport:94fdce73' +3ms
adb:command Send '001Fshell:logcat -B *:I 2>/dev/null' +1ms

[sorccu]

Hi,

Thanks for letting me know. I will check this today.

On Wednesday, January 14, 2015, Eli Perelman [email protected] wrote:

Running with DEBUG=* shows nothing in the console when .ending the logcat:

adb:command Send '000Chost:devices' +0ms adb:command Send '0017host:transport:94fdce73' +3ms adb:command Send '001Fshell:logcat -B *:I 2>/dev/null' +1ms

— Reply to this email directly or view it on GitHub https://github.com/CyberAgent/adbkit/issues/22#issuecomment-69853002.

[eliperelman]

On OS X, using nettop:

adb.724                                                                                           84 B
    tcp4 127.0.0.1:5037<->localhost:58777                            lo0     Established          62 B
    tcp4 127.0.0.1:56672<->*:*                                       lo0          Listen
    tcp4 127.0.0.1:56522<->*:*                                       lo0          Listen
    tcp4 127.0.0.1:56519<->*:*                                       lo0          Listen
    tcp4 127.0.0.1:5037<->localhost:49616                            lo0     Established          22 B
    tcp4 127.0.0.1:5037<->*:*                                        lo0          Listen

Looks like after killing the Node.js process, the Net connections are still present. Running adb kill-server has cleared them up.

[sorccu]

This seems to be due to a misunderstanding on my part. Calling .end() on a pipe target doesn't end the source stream. Will patch soonish.