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Cloud9 requires you to run apps on port 8080
, 8081
, or 8082
.
If you use 8080
, you can access your app from https://myproject-username.c9users.io
. If you use the other two ports then you’ll access it from https://myproject-username.c9users.io:8081
or https://myproject-username.c9users.io:8082
.
Find your elasticsearch.yml
configuration file, and in the Network section uncomment http.port
and set the value to one of the allowed ports (probably 8081
or 8082
if your main app is running on 8080
).
Source:stackexchange.com