Maximum number of real devices

Support
1

Hello Appium folks,
First thank you all for this great tool, and all the information shared here. With all this help i managed to build a platform to automate 15 Android devices on different versions (4.2.2 to 5.1.1), using Appium as nodes of a grid, controlled from Python client.
When i add the 16th device, it seems that i hit some limit. The message i get is:

{ selenium.common.exceptions.WebDriverException: Message: A new session could not be created. (Original error: UiAutomator quit before it successfully launched) }

The other symptom is that adb loses the list of devices.

Any idea what the bottleneck is? and how to go beyond 15 devices?

Thanks in advance

2

adb server limit 30 prot for devices,1 devices occupy 2 port
ref:https://stackoverflow.com/questions/9924274/maximum-number-of-devices-connected-to-an-adb-server