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Payment troubleshooting

Extending the order size limit

Due to a restriction in JmsPaymentBundle, an order exceeding 99999.99999 causes an error message.

It is possible to extend this limit using an official workaround for the JMSPaymentCoreBundle.

You need to override the service class Siso\Bundle\PaymentBundle\Api\StandardPaymentService and modify the EXCEEDED_ENTITY_AMOUNT_VALUE constant. This constant is read by late static binding and will use the overridden value.

For example:

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<?php

namespace App\Service;

use Siso\Bundle\PaymentBundle\Api\StandardPaymentService;

/**
 * Service class override
 * <parameters>
 *     <parameter key="siso_payment.payment_service.class">App\Service\ExamplePaymentService</parameter>
 * </parameters>
 */
class ExamplePaymentService extends StandardPaymentService
{
    const EXCEEDED_ENTITY_AMOUNT_VALUE = 999999999.99;
}

Timeout in redirection to the paygate

At the transaction data encryption stage, the PHP process can run into an execution timeout. This can happen when the user clicks the Buy now button on the order summary page. The exception in the AJAX Response can look like this:

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Exception message:

Error: Maximum execution time of 60 seconds exceeded

Occured in file /var/www/project/vendor/jms/payment-core-bundle/JMS/Payment/CoreBundle/Cryptography/MCryptEncryptionService.php line 91

The problem is with the usage of the PHP function mcrypt_create_iv in that line. The default implementation uses the /dev/urandom device to determine a random number. This can take a long time if the hosting system doesn't generate random events fast enough. Then the call runs into a timeout.

To solve this, check the currently available entropy on the system:

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cat /proc/sys/kernel/random/entropy_avail

The result should be a number greater than 300. If it is less, the entropy is not enough to generate random numbers.

To increase the entropy, you have to install the haveged application.

Install the package with apt-get:

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sudo apt-get install haveged

This tool starts automatically at boot and keeps entropy greater than 1000.