ID: 49965
Updated by: u...@php.net
Reported By: ed at bellcpa dot com
Status: Open
Bug Type: MySQLi related
-Operating System: Windows Server 2008
+Operating System: any
-PHP Version: 5.3.0
+PHP Version: 5.*, 6.*
-Assigned To:
+Assigned To: mysql
New Comment:
Hi Ed,
thanks for the additional information given in a private mail.
Yes, it matters what type the option value has that you pass to
mysqli_options(). It matters ever since 5.0. It is irrelevant if you use
mysqlnd or libmysql.
mysqli_options(mysqli $link, int $option, mixed $value) inspects the
type of the $value parameter. If you pass a string value, as stated in
your private mail, ext/mysqli forwards a string to mysqlnd resp.
libmysql. Both mysqlnd and libmysql expect that the data they get is of
the appropriate type for $option allowing them to use a simple cast to
interpret the data.
String is not the appropriate type for MYSQLI_OPT_CONNECT_TIMEOUT - the
cast inside mysqlnd/libmysql causes a bogus value to be used...
This will not work:
$timeout = "5"
mysqli_options($link, MYSQLI_OPT_CONNECT_TIMEOUT, $timeout);
mysqli_options($link, MYSQLI_OPT_CONNECT_TIMEOUT, "5");
You must use the following:
$timeout = 5;
mysqli_options($link, MYSQLI_OPT_CONNECT_TIMEOUT, $timeout);
mysqli_options($link, MYSQLI_OPT_CONNECT_TIMEOUT, 5);
Previous Comments:
------------------------------------------------------------------------
[2009-10-28 17:52:26] u...@php.net
Interesting. I assume it does not matter if you use 5.3.0 or
5.3.2-dev?
Thanks so far!
Ulf
------------------------------------------------------------------------
[2009-10-28 17:40:27] ed at bellcpa dot com
Ulf,
Here is the fsockopen() result, looks like timeout works as expected:
C:\temp2>php testme.php
PHP Warning: fsockopen(): unable to connect to
tcp://192.168.201.222:3306 (A co
nnection attempt failed because the connected party did not properly
respond aft
er a period of time, or established connection failed because connected
host has
failed to respond.
) in C:\temp2\testme.php on line 6
PHP Stack trace:
PHP 1. {main}() C:\temp2\testme.php:0
PHP 2. fsockopen() C:\temp2\testme.php:6
Warning: fsockopen(): unable to connect to tcp://192.168.201.222:3306
(A connect
ion attempt failed because the connected party did not properly respond
after a
period of time, or established connection failed because connected host
has fail
ed to respond.
) in C:\temp2\testme.php on line 6
Call Stack:
0.0312 324832 1. {main}() C:\temp2\testme.php:0
0.0491 325280 2. fsockopen() C:\temp2\testme.php:6
bool(false)
int(10060)
string(185) "A connection attempt failed because the connected party
did not pro
perly respond after a period of time, or established connection failed
because c
onnected host has failed to respond.
"
float(5.1100761890411)
------------------------------------------------------------------------
[2009-10-28 17:07:43] u...@php.net
Ah, looks I'm wrong on the loop. PHP should iterate over all possible
hosts and only decrement remaining time if there are multiple hosts...
Anyway, fsockopen() would be interesting.
------------------------------------------------------------------------
[2009-10-28 16:54:33] u...@php.net
Hi Ed,
as you may know from the Wireshark protocol you provided
(mysql-noserver.pcap - MySQL is offline) there is a TCP SYN->RST,ACK
ping-pong between the client machine and the server.
PHP tries to establish a connection and sends SYN. The server's
response is RST (, ACK) indicating that no process on the server is
wating for requests on the requested port (MySQL is offline).
At this point PHP should get ECONNREFUSED from connect() and bubble up
the error. But it seems as if this is not the case. According to the
Wireshark protocol the first SYN->RST,ACK is followed by another
connection attempt after about 0.5s which fails. PHP continues to make
another connection attempt after 1s which fails again.
The ping-pong should start because PHP recognizes after 0.5s
respectively 1s that there is time left for more connection attempts
(you set the connect timeout to 5s).
I don't know why the protocol shows no more records after 1s.
However, can you try using fsockopen() to connect to the MySQL host if
MySQL is offline?
Something like this:
sapi/cli/php -r '$start = microtime(true); $errno = 0; $error = ""; $fp
= fsockopen("tcp://192.168.201.222", 3306, $errno, $error, 5);
var_dump($fp); var_dump($errno); var_dump($error);
var_dump(microtime(true) - $start); '
Again, I'd be interested in the Wireshark protocol (unless it is
blocking endless).
Thanks!
Ulf
------------------------------------------------------------------------
[2009-10-27 21:19:50] ed at bellcpa dot com
Hi Ulf,
I tried a 5.3.2-dev VC9 x86 thread-safe snapshot (not sure how to
obtain 5.3.1) with same results. Also tried a 5 second
default_socket_timeout with no effect.
Will send the captures to you by email.
Thanks
------------------------------------------------------------------------
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