Curl Error (HTTP 0): getaddrinfo() thread failed to start

There is some problem with curl and closing its open filedescriptors :(

PHP Warning:  include(/usr/share/php/AbraFlexi/Exception.php): Failed to open stream: Too many open files in /var/lib/composer/discomp2abraflexi/composer/ClassLoader.php on line 576
PHP Stack trace:
PHP   1. {main}() /usr/share/discomp2abraflexi/discomp2abraflexi.php:0
PHP   2. SpojeNet\\Discomp\\Importer->freshItems() /usr/share/discomp2abraflexi/discomp2abraflexi.php:34
PHP   3. SpojeNet\\Discomp\\Importer->prepareCategories($categoriesRaw = [0 => \'Druhy > Počítače > PC komponenty > Paměti > DDR4 > 4GB\', 1 => \'Vyrobci - WEB > TRANSCEND > Počítače > PC komponenty > Paměti > DDR4 > 4GB\']) /usr/share/discomp2abraflexi/Discomp/Importer.php:284
PHP   4. SpojeNet\\Discomp\\Importer->categoryBranch($nodes = [0 => \'Discomp\', 1 => \'Vyrobci - WEB\', 2 => \'TRANSCEND\', 3 => \'Počítače\', 4 => \'PC komponenty\', 5 => \'Paměti\', 6 => \'DDR4\', 7 => \'4GB\']) /usr/share/discomp2abraflexi/Discomp/Importer.php:543
PHP   5. SpojeNet\\Discomp\\Importer->createBranchNode($node = \'Discomp\', $level = 0, $parent = \'\', $kod = \'39797b8d0f122a4f69bd1d29c202b691\') /usr/share/discomp2abraflexi/Discomp/Importer.php:559
PHP   6. AbraFlexi\\RO->__construct($init = \'code:39797B8D0F122A4F69BD1D29C202B6\', $options = [\'ignore404\' => TRUE]) /usr/share/discomp2abraflexi/Discomp/Importer.php:582
PHP   7. AbraFlexi\\RO->processInit($init = \'code:39797B8D0F122A4F69BD1D29C202B6\') /usr/share/php/AbraFlexi/RO.php:438
PHP   8. AbraFlexi\\RO->loadFromAbraFlexi($id = \'code:39797B8D0F122A4F69BD1D29C202B6\') /usr/share/php/AbraFlexi/RO.php:635
PHP   9. AbraFlexi\\RO->getFlexiData($suffix = \'https://server:5434/c/company/strom/code:39797B8D0F122A4F69BD1D29C202B6\', $conditions = \'\') /usr/share/php/AbraFlexi/RO.php:1558
PHP  10. AbraFlexi\\RO->performRequest($urlSuffix = \'https://server:5434/c/company/strom/code:39797B8D0F122A4F69BD1D29C202B6\', $method = \'GET\', $format = *uninitialized*) /usr/share/php/AbraFlexi/RO.php:1522
PHP  11. AbraFlexi\\RO->doCurlRequest($url = \'https://server:5434/c/company/strom/code:39797B8D0F122A4F69BD1D29C202B6\', $method = \'GET\', $format = NULL) /usr/share/php/AbraFlexi/RO.php:997
PHP  12. Composer\\Autoload\\ClassLoader->loadClass($class = \'AbraFlexi\\\\Exception\') /usr/share/php/AbraFlexi/RO.php:1302
PHP  13. Composer\\Autoload\\{closure:/var/lib/composer/discomp2abraflexi/composer/ClassLoader.php:575-577}($file = \'/var/lib/composer/discomp2abraflexi/composer/../deb/abraflexi/Exception.php\') /var/lib/composer/discomp2abraflexi/composer/ClassLoader.php:427

https://github.com/Spoje-NET/discomp2abraflexi

Start in AbraFlexi/RO.php around doCurlRequest() at line 997 and the request path through performRequest() and getFlexiData(), using the provided stack trace. Compare this with the discomp2abraflexi importer calls shown in the report and determine why repeated requests exhaust file descriptors and produce HTTP 0; done means the failure is prevented or handled correctly.