Fixing cpu hog with all upstream servers marked "down". The following configuration causes nginx to hog cpu due to infinite loop in ngx_http_upstream_get_peer(): upstream backend { server 127.0.0.1:8080 down; server 127.0.0.1:8080 down; } server { ... location / { proxy_pass http://backend; } } Make sure we don't loop infinitely in ngx_http_upstream_get_peer() but stop after resetting peer weights once. Return 0 if we are stuck. This is guaranteed to work as peer 0 always exists, and eventually ngx_http_upstream_get_round_robin_peer() will do the right thing falling back to backup servers or returning NGX_BUSY.

X:stylesheet {

X:template = "section[@name and @title]" {
    <a name="{@name}" /> <center><h4> !{@title} </h4></center>
    !!;
}

X:template = "section[not(@name) and @title]" {
    <center><h4> !{@title} </h4></center>
    !!;
}

X:template = "section[not(@name) and not(@title)]" { !!; }

X:template = "para" { <p> !!; </p> }

X:template = "value" { <i> !!; </i> }

}