I started magento 2 upgrade over a half hour ago.
The on screen console log shows:
[2016-04-26 20:45:03 EDT] Job "maintenance_mode {"enable":true}" has been started
[2016-04-26 20:45:03 EDT] Magento maintenance mode is enabled.
[2016-04-26 20:45:03 EDT] Job "maintenance_mode {"enable":true}" has successfully completed
[2016-04-26 20:45:04 EDT] Job "update {"components":[{"name":"magento/product-community-edition","version":"2.0.3"}]}" has been started
[2016-04-26 20:45:04 EDT] Starting composer update...
[2016-04-26 20:45:04 EDT] ./composer.json has been updated
It seems to be hung.
Is it working? How long does it take?