How to solve lighttpd "No input file specified." - webserver

Question

Last time I was using Apache2+PHP5 as my web server and it run normally unless too slow when server is process my script and I had change it to lighttpd + fastcgi. It faster than and low memory usage.
My problem is when lighttpd running some time it "No input file specified." but some time is ok. But when I restart lighttpd every come to normally.
I don't know why and how to solve it.
This is my config.
$SERVER["socket"] == ":80" {
$HTTP["host"] == "xxx.xxx.xxx.xxx" {
server.document-root = "/var/www/public_html"
server.errorlog = "/var/www/public_html/logs/error.log"
accesslog.filename = "/var/www/public_html/logs/access.log"
compress.cache-dir = "/var/www/public_html/cache"
}
$HTTP["host"] == "sub.domain.com" {
server.document-root = "/var/www/public_html"
server.errorlog = "/var/www/public_html/logs/error.log"
accesslog.filename = "/var/www/public_html/logs/access.log",
compress.cache-dir = "/var/www/public_html/cache"
}
index-file.names = ( "index.php", "index.html", "index.htm", "default.htm" )
url.rewrite-if-not-file = (
"^/image(.*)" => "/image-api.php$1",
"^/go/([a-zA-Z0-9_-]+)" => "/index.php?go=$1",
"^/oembed(.*)" => "/oembed_provider/index.php$1",
"^/player$" => "/library/plugin/video-player/player.swf",
"^/v(.*)" => "/cvd.php$1",
"^/me" => "/user.php",
"^/#(.*)\?(.*)" => "/profile.php?indentity=$1&$2",
"^/#(.*)" => "/profile.php?indentity=$1",
"^/url?g=(.*)" => "/url.php?g=$1",
"^/social_auth/(.*)" => "/partner_api/$1.php",
"^/c/(.*)" => "/view.php?view=$1",
"^/u/(.*)" => "/profile.php?indentity=$1",
"^/project/(.*)" => "/section.php?page=$1",
"^/min/(.*)" => "/mini/index.php$1",
"^/src/(.*)" => "/src/$1",
"^/library/(.*)" => "/library/$1",
"^/\?(.*)" => "/index.php?$1",
"^/(.*)\?(.*)" => "/page.php?p=$1&$2",
"^/(.*)" => "/page.php?p=$1"
)
$HTTP["host"] == "domain.org" {
url.redirect = ("/(.*)$" => "https://domain.com/$1")
}
$HTTP["host"] == "domain.info" {
url.redirect = ("/(.*)$" => "https://domain.com/$1")
}
$HTTP["host"] == "domain.net" {
url.redirect = ("/(.*)$" => "https://domain.com/$1")
}
}

Answer 1

From the FAQ, it looks like there are several possibilities:
I get the error "No input file specified" when trying to use PHP
Sadly, this error message can mean a lot of things.
A common explanation attempt: PHP is unable to locate or open the file which it
is supposed to parse.
This can have a lot of reasons:
You forgot to
add ''cgi.fix_pathinfo=1 to your php.ini'' file. See the comments in
the PHP docs. The issue here is that the environment variable
SCRIPT_FILENAME is not being passed to PHP.
Make sure you did not set
doc_root or userdir in php.ini, or if you have set it, make sure it
has the correct value (doc_root should match lighttpd's
server.document-root option in this case)
If open_basedir is set, make
sure the requested file is below one of the directories which is
specified there. In the past PHP parsed files which were not inside
open_basedir as well, but this security problem was fixed (in
php-5.2.3 or so).
If you are running PHP with different permissions
than lighttpd (spawn-fcgi with -u/-g, execwrap, suexec, ...), check
that PHP can really read the file
If you are unable to find / fix the
problem, you can use strace to see if it is a (OS-related) permission
problem (look out for stat*(...YOURFILE...) = RETURNCODE). It might
help to set max-procs to 1 and PHP_FCGI_CHILDREN as well (see fastcgi
docs) in that case, so that you can easily attach strace to the
correct php-cgi process.