What is the race condition that can occur if one sets the reconnect option
after the connection comes up?
On Tue, Jul 20, 2010 at 10:42 AM, Warren Young <mysqlpp@stripped> wrote:
> On 7/20/2010 8:17 AM, Martin Dubuc wrote:
>> This code used to work on both CentOS 5.4 (mysql-5.0.77-3) and Fedora 13
>> when using the 3.0.9 version of mysql++, but since I upgraded to mysql++
>> 3.1.0 and CentOS 5.5, the connect call fails with error "Option can only
>> set while the connection is established" on CentOS 5.5, although it works
>> Fedora 13.
> From the 3.1.0 section of the MySQL++ ChangeLog:
> o ReconnectOption behavior now knows about a fix in MySQL 5.1.6 and
> newer that lets you set it either before the connection is up,
> or after. If you try to set this option when MySQL++ is built
> against earlier versions of the MySQL C API, it will refuse to
> set the option because it knows the option will be reset when
> the connection comes up.
> The truth about your observation that "it used to work" is that it didn't
> do what you thought it did.
> While you could just move the set_option() call to after the connect()
> call, it'd be better to upgrade to the current MySQL 5.1 release and leave
> your code the same, as that avoids a race condition.
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