ID: 41579
User updated by: vtsupermok at gmail dot com
Reported By: vtsupermok at gmail dot com
Status: Open
Bug Type: PDO related
Operating System: Window
PHP Version: 5.2.3
New Comment:
here are my actual result
---------------------------------------------------------------
1. Start
2. Connect to DB by a PERSISTENT connection
3. query "select 'a','b','c'"
4. list all of the result
a b c
5. query "show processlist"
7. suppose the thread id of this connection is 2654. (Are there any
ways to get the thread id? I use a very stupid way to GUESS the thread
id)
8. kill this connection query 'kill 2654'
9. the PERSISTENT connection was kill.
10. Now, when you refresh your page, I SUPPOSE there are 2 result may
happened.
Case 1, since the connection was kill so it will create a new
connection automatically without throw any error.
Case 2, it will throw a exception in function dbConnect() since the
connection was lost when it call create PDO object
but sadly the real case is, there are no exception was throw until you
make another query.
So the problem is there are no ways check the PERSISTENT connection is
still alive or not in case the connection was killed or timeout
by the way one more question, are there any function to get the thread
id?
after refresh
-------------------------------------------------------------
1. Start
2. Connect to DB by a PERSISTENT connection
3. query "select 'a','b','c'"
Message : SQLSTATE[HY000]: General error: 2013 Lost connection to MySQL
server during query
File : D:\AppServ\www\report\92\testing.php
Line : 25
Previous Comments:
------------------------------------------------------------------------
[2007-06-05 06:37:53] vtsupermok at gmail dot com
pls try this code again ,the case was not happened when you close and
start the mysql server, it is happened when the connection was killed or
timeout
<?
function dbConnect($db){
try{
$database="mysql:host={$db['host']};port={$db['port']};dbname={$db['name']}";
$pdo = new PDO($database, $db['userID'], $db['userPwd'],
array(PDO::ATTR_PERSISTENT => true));
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$pdo->setAttribute(PDO::ATTR_TIMEOUT,5);
return $pdo;
} catch (PDOException $e) {
throw $e;
}
}
function dbException($e,$db){
echo "<p>";
echo "Message : " . $e->getMessage() . "<br/>";
echo "File : " . $e->getFile() . "<br/>";
echo "Line : " . $e->getLine() . "<br/>";
echo "</p>";
die();
}
function dbQuery($pdo,$sql,$db){
try{
return $pdo->query($sql);
} catch (PDOException $e) {
throw $e;
}
}
function dbRecord($result,$db){
$resultSet=$result->fetchAll(PDO::FETCH_ASSOC);
$counter=count($resultSet);
if ($counter>0){
echo "<table border=1>";
for ($i=0;$i<$counter;$i++){
echo "<tr>";
foreach ($resultSet[$i] as $key => $value){
echo "<td>"."$value"."</td>";
}
echo "</tr>";
}
echo "</table>";
}
}
function dbGetThreadID($result,$db){
$id=0;
$resultSet=$result->fetchAll(PDO::FETCH_ASSOC);
$counter=count($resultSet);
if ($counter>0){
for ($i=0;$i<$counter;$i++){
if ($resultSet[$i]['Id']>$id){
$id=$resultSet[$i]['Id'];
}
}
}
return $id;
}
try {
$db=array(
'name'=>'modern',
'host'=>'143.89.41.104',
'port'=>'3306',
'userID'=>'logic',
'userPwd'=>'logic',
'charset'=>'latin1',
'encoding'=>'big-5'
);
echo '1. Start <Br />';
echo '2. Connect to DB by a PERSISTENT connection<Br />';
$pdo=dbConnect($db);
echo '3. query "select \'a\',\'b\',\'c\'"<Br
/>';
$sql="select 'a','b','c'";
$result=dbQuery($pdo,$sql,$db);
echo '4. list all of the result<Br />';
dbRecord($result,$db);
echo '5. query "show processlist"<br>';
$sql="show processlist";
$result=dbQuery($pdo,$sql,$db);
$threadId=dbGetThreadID($result,$db);
echo "7. suppose the thread id of this connection is {$threadId}.
(Are there any ways to get the thread id? I use a very stupid way to
GUESS the thread id)<Br />";
echo "8. kill this connection query 'kill $threadId'<Br />";
$sql="kill $threadId";
$result=dbQuery($pdo,$sql,$db);
echo "9. the PERSISTENT connection was kill.<Br />";
echo "10. Now, when you refresh your page, I SUPPOSE there are 2
result may happened.<br />";
echo "Case 1, since the connection was kill so it will create a new
connection automatically without throw any error. <br />";
echo "Case 2, it will throw a exception in function dbConnect()
since the connection was lost when it call create PDO object<Br>";
echo "but sadly the real case is, there are no exception was throw
until you make another query.<Br>";
echo "So the problem is there are no ways check the PERSISTENT
connection is still alive or not in case the connection was killed or
timeout<br>";
echo "by the way one more question, are there any function to get
the thread id?<br>";
} catch (PDOException $e) {
dbException($e,$db);
}
?>
------------------------------------------------------------------------
[2007-06-04 11:06:58] tony2001@php.net
Cannot reproduce.
After restarting MySQL server, PDO reconnects successfuly and I don't
see any error at all.
If I put MySQL server down, the error/exception appears on step 1.
------------------------------------------------------------------------
[2007-06-04 09:38:27] vtsupermok at gmail dot com
Dear sir
Sorry for my incomplete example, let me give you a full set program.
<?
function dbConnect($db){
try{
$database="mysql:host={$db['host']};port={$db['port']};dbname={$db['name']}";
$pdo = new PDO($database, $db['userID'], $db['userPwd'],
array(PDO::ATTR_PERSISTENT => true));
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$pdo->setAttribute(PDO::ATTR_TIMEOUT,5);
return $pdo;
} catch (PDOException $e) {
throw $e;
}
}
function dbException($e,$db){
echo "<p>";
echo "Message : " . $e->getMessage() . "<br/>";
echo "File : " . $e->getFile() . "<br/>";
echo "Line : " . $e->getLine() . "<br/>";
echo "</p>";
die();
}
function dbQuery($pdo,$sql,$db){
try{
return $pdo->query($sql);
} catch (PDOException $e) {
throw $e;
}
}
function dbRecord($result,$db){
$resultSet=$result->fetchAll(PDO::FETCH_ASSOC);
$counter=count($resultSet);
if ($counter>0){
for ($i=0;$i<$counter;$i++){
foreach ($resultSet[$i] as $key => $value){
echo "get data: "."$value"."<Br>";
}
}
}
}
try {
$db=array(
'name'=>'test',
'host'=>'127.0.0.1',
'port'=>'3306',
'userID'=>'abc',
'userPwd'=>'abc',
'charset'=>'latin1',
'encoding'=>'big-5'
);
echo 'Step 1<Br />';
$pdo=dbConnect($db);
echo 'Step 2<Br />';
$sql="select 'a','b','c'";
$result=dbQuery($pdo,$sql,$db);
echo 'Step 3<Br />';
dbRecord($result,$db);
echo 'Step 4<Br />';
} catch (PDOException $e) {
dbException($e,$db);
}
?>
the testing process should be like this
1.run this script
2.the screen output:
Step 1
Step 2
Step 3
get data: a
get data: b
get data: c
Step 4
3. the connection is PERSISTENT so I kill it in db server by myself
4. run the script again, the result is like this.
Step 1
Step 2
Message : SQLSTATE[HY000]: General error: 2013 Lost connection to MySQL
server during query
File : D:\AppServ\www\report\92\testing.php
Line : 25
The problem is, the connection was killed so it return 2013 Lost
connection. I suppose the exception was throw after step 1 since the
connection was fail,but the real case is this exception was throw after
step 2 rather than step 1.
I have no ways to know the PERSISTENT connection is still alive or not
------------------------------------------------------------------------
[2007-06-04 08:30:55] tony2001@php.net
What exactly do I need to do in order to reproduce it?
------------------------------------------------------------------------
[2007-06-04 04:25:10] vtsupermok at gmail dot com
Description:
------------
I create a pdo object and set PDO::ATTR_PERSISTENT => true, after
serveral hours I run my programme again. Suppose the connection will be
timeout and then the program throw a PDOException.
But the real situation is it said time out lost connection but it
wouldn't return a PDOException.
Reproduce code:
---------------
$db=array(
'name'=>'abc',
'host'=>'127.0.0.1',
'port'=>'3306',
'userID'=>'123',
'userPwd'=>'123',
'charset'=>'latin1',
'encoding'=>'big-5'
);
try{
$database="mysql:host={$db['host']};port={$db['port']};dbname={$db['name']}";
$pdo = new PDO($database, $db['userID'], $db['userPwd'],
array(PDO::ATTR_PERSISTENT => true));
} catch (PDOException $e) {
throw $e;
}
Expected result:
----------------
throw a exception.
Actual result:
--------------
the mysql error is timeout lost connection but it would't throw a
exception
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=41579&edit=1