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Type:
Bug
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Resolution: Duplicate
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Priority:
Major - P3
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None
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Affects Version/s: 1.2.0, 1.2.1, 1.2.2
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Component/s: None
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None
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Environment:Debian 8.6, PHP 5.6, php5.6-mongodb, MongoDB 3.2.10
Hello,
After updating the php driver to 1.2.2 (from 1.1.9), we encoutered ConnectionTimeoutException on our forked processes, forcing us to downgrade to 1.1.9 (or 1.1.10).
Here's a script that will throw the exception :
<?php
$manager = new MongoDB\Driver\Manager("mongodb://localhost:27018");
$bulk = new MongoDB\Driver\BulkWrite;
$bulk->insert(['x' => 1]);
$bulk->insert(['x' => 2]);
$bulk->insert(['x' => 3]);
$manager->executeBulkWrite('test.toto', $bulk);
$pid = pcntl_fork();
if ($pid == -1) {
die('duplication impossible');
} else if ($pid) {
//Parent
sleep(2); // We wait for the child to finish
echo "In the parent process".PHP_EOL;
$filter = ['x' => ['$gt' => 1]];
$options = [
'projection' => ['_id' => 0],
'sort' => ['x' => -1],
];
$query = new MongoDB\Driver\Query($filter, $options);
$cursor = $manager->executeQuery('test.toto', $query);// And here occurs the error
foreach ($cursor as $document) {
var_dump($document);
}
} else {
//Child
echo "In the child process".PHP_EOL;
$filter = ['x' => ['$gt' => 1]];
$options = [
'projection' => ['_id' => 0],
'sort' => ['x' => -1],
];
$query = new MongoDB\Driver\Query($filter, $options);
$cursor = $manager->executeQuery('test.toto', $query);
foreach ($cursor as $document) {
var_dump($document);
}
}
Easy script, it writes to a collection before forking. Then the child reads (with success) the written objects, while the father waits a few seconds and then also reads the written objects.
Here's the output :
> php generate_fork_mongo.php
In the child process
/home/admro/generate_fork_mongo.php:46:
class stdClass#6 (1) {
public $x =>
int(3)
}
/home/admro/generate_fork_mongo.php:46:
class stdClass#7 (1) {
public $x =>
int(2)
}
In the parent process
PHP Fatal error: Uncaught exception 'MongoDB\Driver\Exception\ConnectionTimeoutException' with message 'Failed to send "find" command with database "test": Failure during socket delivery: Broken pipe (32)' in /home/admro/generate_fork_mongo.php:27
Stack trace:
#0 /home/admro/generate_fork_mongo.php(27): MongoDB\Driver\Manager->executeQuery('test.toto', Object(MongoDB\Driver\Query))
#1 {main}
thrown in /home/admro/generate_fork_mongo.php on line 27
Also find attached the output of mongodb.debug.
My guess is that once the child has finished working, it closes the connection without the parent knowing. Then the parent tries to use the connection and throws the exception.
Best regards,
Bastien Diederichs
- is duplicated by
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- Closed
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