After upgrading an elasticsearch 2 instance to 5.6.9 I got an error "missing authentication token for REST request". I fixed that by setting "xpack.security.enabled: false".
However, I'm also sucessfully running an elasticsearch 5.3 cluster where I didn't need that setting and still can perform any request without authentication.
Has the default behavior of "xpack.security.enabled" changed in one of the last releases or am I missing something else here?
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