Scrapy Splash + Crawlera in Linux always get 503 service unavailable error

Question

When I use Scrapy Splash + Crawlera in my Linux server, it always gets 503 errors. It works just fine in Windows. Why is that?

Answer 1

It turns out, it doesn't work if I set SPLASH_URL = '0.0.0.0:8050'. I have to set it using the IP instead of localhost IP, like SPLASH_URL = 'xxx.xxx.xxx.xxx:8050'