nginx - increase increase server_names_hash_bucket_size

Today I ran in to something I’d never seen before when configuring nginx.

I ran the nginx config test, as I usually do before I restart it.

nginx -t

But, the response I got was interesting

2010/03/18 21:16:09 [emerg] 12299#0: could not build the server_names_hash, you should increase server_names_hash_bucket_size: 32
2010/03/18 21:16:09 [emerg] 12299#0: the configuration file /etc/nginx/nginx.conf test failed

I found that one of the domain names I was using was over 32 characters in length, nginx’s default max length.

Thankfully the fix was simple.

http {
    # ...snip...
    server_names_hash_bucket_size 64;
    # ...snip...
}