AdbCommandRejectedException getting properties when testing on emulator

Question

It's getting really frustrating to test any apps at all. I start up the emulator and run the app the first time and it works and immediately starts throwing this in the ADB Logs

DeviceMonitor: Failed to connect to client '2560': EOF
PropertyFetcher: AdbCommandRejectedException getting properties for device emulator-5554: device offline

Logcat displays nothing. I've tried everything to stop this. Killing and starting the adb server does not solve the problem. I have to restart the AVD.

Any help will be appreciated. Thanks

Answer 1

This usually happens because android emulator is just to slow and adb command times out. But you have parameter that you can set to increase this timeouts.

If you are running adb commands through gradle. For example connnectedCheck. You can use android plugin DSL to set this parameter as shown blow

android {
    adbOptions {
        timeOutInMs 60000 // set timeout to 1 minute
    }
}

This was added in android gradle plugin 1.2.0. Unfortunately it only works if you have multidex enabled. For some reason they forgot to include it for single apk builds. But there is a workaround to handle this. You can just call static method as show below.

com.android.ddmlib.DdmPreferences.setTimeOut(60000)

If you are running adb commands directly with adb you have an option to set environment variable that will handle this.

export ADB_INSTALL_TIMEOUT=5

Keep in mind that ADB_INSTALL_TIMEOUT is set in seconds and not in milliseconds as in gradle DSL.