I have the same problem.

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log_format access '$remote_addr\t-\t$remote_user\t[$time_local]\t"$request"\t'
'$status\t$body_bytes_sent\t"$http_referer"\t'
'"$http_user_agent"\t$http_x_forwarded_for';

access_log /d1/logs/access.log access;

#limit_conn crawler 20;

location ~ .*\.(php|php5)?$
{
#fastcgi_pass unix:/tmp/php-cgi.sock;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
include fcgi.conf;
}

location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
{
expires 30d;
}

location ~ .*\.(js|css)?$
{
expires 1h;
}

location /noresult_dispatch/ {
access_log /d1/logs/noresult_dispatch-access.log access;
}


-------------------------
"/d1/logs/noresult_dispatch-access.log " filesize is 0.