UDP batching mechanism doesn't seem to work properly

[johnknl]

Looking at the code, it should batch if the size of the payload exceeds 65k bytes, but this mechanism doesn't seem to work.

ErrorException

Notice: fwrite(): Send of 69497 bytes failed with errno=90 Message too large

/vendor/auxmoney/jaeger-php/src/Jaeger/Sender/UdpSender.php in Jaeger\Sender\UdpSender::emitBatch at line 77
/vendor/auxmoney/jaeger-php/src/Jaeger/Transport/TransportUdp.php in Jaeger\Transport\TransportUdp::flush at line 172
/vendor/auxmoney/jaeger-php/src/Jaeger/Transport/TransportUdp.php in Jaeger\Transport\TransportUdp::append at line 125
/vendor/auxmoney/jaeger-php/src/Jaeger/Reporter/RemoteReporter.php in Jaeger\Reporter\RemoteReporter::report at line 35
/vendor/auxmoney/jaeger-php/src/Jaeger/Jaeger.php in Jaeger\Jaeger::reportSpan at line 171
/vendor/auxmoney/jaeger-php/src/Jaeger/Jaeger.php in Jaeger\Jaeger::flush at line 272
/vendor/auxmoney/opentracing-bundle-core/Internal/PersistenceService.php in Auxmoney\OpentracingBundle\Internal\PersistenceService::flush at line 25
/vendor/auxmoney/opentracing-bundle-core/EventListener/FinishRootSpanSubscriber.php in Auxmoney\OpentracingBundle\EventListener\FinishRootSpanSubscriber::onTerminate at line 63
/vendor/symfony/event-dispatcher/EventDispatcher.php in Symfony\Component\EventDispatcher\EventDispatcher::Symfony\Component\EventDispatcher\{closure} at line 260
/vendor/symfony/event-dispatcher/EventDispatcher.php in Symfony\Component\EventDispatcher\EventDispatcher::callListeners at line 220
/vendor/symfony/event-dispatcher/EventDispatcher.php in Symfony\Component\EventDispatcher\EventDispatcher::dispatch at line 56
/vendor/symfony/http-kernel/HttpKernel.php in Symfony\Component\HttpKernel\HttpKernel::terminate at line 116
/vendor/symfony/http-kernel/Kernel.php in Symfony\Component\HttpKernel\Kernel::terminate at line 157

We've also tried to override the factory to pass 40k into TransportUDP, but this didn't make any difference.