MySQL Master <-> Slave，PDO，Zend框架和事务

Question

We have some wired problems with the following structure:

• Zend Framework 1
• MySQL 5 Master <-> Slave replication
• PDO (Zend) Transactions

Example:

Query 1

 $adapter->beginTransaction():      
 $where = $adapter->quoteInto('ID = ?', $id);
 $adapter->update()...
 $adapter->commit();

Query 2

 $adapter->beginTransaction():      
 $where = $adapter->quoteInto('ID = ?', $id);
 $adapter->update()...
 $adapter->commit();

When started on an non cluster mysql server everything works fine. When started on an replicated enviorment we get the following exception:

There is no active transaction

Now i have added:

$adapter->closeConnection();

after the first query, voila it works on the cluster. Removed it : and it is still working...

Cant explain this, maybe an unclosed transaction? or normal behavoir?

Answer 1

Do you have a plugin that ensures that the connections are closed on every http request? I used to have weird behaviors with zend and dbs because the connections were remaining open.