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Ran 04 Nov 2017 03:48PM UTC

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Committed 04 Nov 2017 03:44PM UTC coverage: 56.818%. Remained the same

Job # 55.3

Build Type

Pull #21

travis-ci

Committed by

web-flow

Commit Message

Long running process race condition

Trying to recreate a task after a long running process ends in a race condition in the pdo module (actually any db calls through the pdo module for this task)

When you pass the pdo object to the `_testConnection(\PDO $pdo)` function its actually receives the value of the reference to the pdo object.
Setting it to null in the catch statement doesn't set `$this->_pdo = null;` only the local `$pdo` variable
You need to pass it a reference to the reference

To test firstly see what you're mysql timeouts are set to using
```
SHOW VARIABLES LIKE 'wait_timeout';
SHOW VARIABLES LIKE 'interactive_timeout';
```
put a sleep in your test task longer than the largest one (its in seconds)
see a race condition as `$this->_testConnection()` calls `$this->_getPdo();` while `$this->_pdo` stays not null.... and repeat

At least this is so in php v5.6.32
mh

Pull Request Pull Request #21: Long running process race condition

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