Edit report at http://bugs.php.net/bug.php?id=53287&edit=1
ID: 53287
Comment by: seza at paradoxal dot org
Reported by: bryan dot tong at gigenet dot com
Summary: PDO 5 Byte write to a broken pipe when forked
Status: Feedback
Type: Bug
Package: PDO related
Operating System: CentOS 5.5 x86-64
PHP Version: 5.3SVN-2010-11-10 (snap)
Assigned To: mysql
Block user comment: N
Private report: N
New Comment:
I have the same error message with php.5.3.3 (send of 5 bytes failed
with errno=32 Broken pipe) but in a
different context more simply to reproduce :
I have a simple website (no fork or stuff like that). It make persistent
connection with pdo to mysql
(mysqlnd). The errors are raised when the mysql is server is restarted.
When mysql server is off error message are mysql server is gone away. No
problem with that but once the
mysql server is restarted and during 15 minutes I have sometimes this
error message (send of 5 bytes
failed with errno=32 Broken pipe).
Certainly a reuse of a cached connection to mysql before it was
restarted.
PS : I use mysql_sock connection
(mysql:unix_socket=/var/run/mysqld/mysqld.sock)
Previous Comments:
------------------------------------------------------------------------
[2010-11-26 13:19:45] johan...@php.net
The description mentions forking, the sample code not. Please provide a
complete script showing the issue.
------------------------------------------------------------------------
[2010-11-10 03:21:00] bryan dot tong at gigenet dot com
Description:
------------
When switching from PHP 5.1.6 to PHP 5.3.3 the following notice has
begun to show up in our scripts.
PDO::__construct(): send of 5 bytes failed with errno=32 Broken pipe
We are running a daemon and the forked children throw this error on the
PDO construct that is used to refresh the class.
The error changes depending on whether a persistent connection is set or
not.
When persistent is on the above error is produced. Without persistent
connection applied the error is thrown when the class is destructed.
Example: $pdo = null;
send of 5 bytes failed with errno=32 Broken pipe
We have confirmed this to be apparent in PHP 5.3.3 and the trunk build.
I was unable to test on 5.2, but I was able to confirm this bug does not
occur on 5.1.6
I have tried wrapping ob functions around the calls in case the broken
pipe happened to be stdout but I think it is the mysql socket that is in
question. On that same note, switching mysql to connect via tcp did not
help.
>From searching I found a site that threw this error but no discussions
of it.
Let me know any additional information that is needed.
Test script:
---------------
// without persistance
public static function shutdown(){
$base = Base::getBase();
$base->db = null;
self::$base = false;
}
// with persistance
$this->pdo = new PDO(
$dsn,
$user,
$pass,
array(
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
PDO::ATTR_PERSISTENT=> true
)
);
Expected result:
----------------
The PDO class should startup quietly when persistent connections are
enabled and destruct quietly when persistent connections are disabled.
Actual result:
--------------
PDO::__construct(): send of 5 bytes failed with errno=32 Broken pipe
with persistent connections.
Base::shutdown(): send of 5 bytes failed with errno=32 Broken pipe
without persistent connections.
I believe this problem is only related to forked processes. I have
confirmed the standard page serving to not throw this.
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/bug.php?id=53287&edit=1
