./startcts
Android CTS version 2.3_r4
Device(emulator-5554) connected
cts_host > start --plan CTS -t android.example.cts.ExampleSecondaryTest#testZorch
	(repeat this about an hour)

..and this happens:

01:36:50 E/ddms: ADB rejected shell command (am instrument -w -e bundle true android.tests.devicesetup/android.tests.getinfo.DeviceInfoInstrument): closed CTS_ERROR >>> Failed to execute shell command am instrument -w -e bundle true
android.tests.devicesetup/android.tests.getinfo.DeviceInfoInstrument on device emulator-5554 com.android.ddmlib.AdbCommandRejectedException: closed CTS_ERROR >>> Timeout: getDeviceInfo start test android.example.cts.ExampleSecondaryTest#testZorch
============================================================== Test package: android.example
01:38:50 E/ddms: ADB rejected shell command (am broadcast -a android.tests.util.disablekeyguard): closed CTS_ERROR >>> Failed to execute shell command am broadcast -a android.tests.util.disablekeyguard on device emulator-5554 com.android.ddmlib.AdbCommandRejectedException: closed CTS_ERROR >>> Installing met timeout due to Unknown reason. Time: 130.9s

Can be any test case for example same loop for android.sax.cts.ElementTest#testAndroidTestCaseSetupProperly results same error:

11:56:46 E/ddms: ADB rejected shell command (am instrument -w -e bundle true android.tests.devicesetup/android.tests.getinfo.DeviceInfoInstrument): closed CTS_ERROR >>> Failed to execute shell command am instrument -w -e bundle true android.tests.devicesetup/android.tests.getinfo.DeviceInfoInstrument on device emulator-5554 com.android.ddmlib.AdbCommandRejectedException: closed CTS_ERROR >>> Timeout: getDeviceInfo
11:58:46 E/ddms: ADB rejected shell command (am broadcast -a android.tests.util.disablekeyguard): closed CTS_ERROR >>> Failed to execute shell command am broadcast -a android.tests.util.disablekeyguard on device emulator-5554 com.android.ddmlib.AdbCommandRejectedException: closed start test android.sax.cts.ElementTest#testAndroidTestCaseSetupProperly
============================================================== Test package: android.sax CTS_ERROR >>> Installing met timeout due to Unknown reason. Time: 130.3s

#!/bin/bash
while [ true ]; do
        ./startcts start --plan CTS -t android.example.cts.ExampleSecondaryTest#testZorch
done;