Fixed Elasticsearch 2.0 Error

[FloV]

I've got the following error after upgrading to ES2 and rebuilding a new index.

An exception occurred: Elasticsearch indexing failed. See the server error log for more details. in /var/www/mydomain.com/library/XenES/Search/SourceHandler/ElasticSearch.php on line 975

XenES_Search_SourceHandler_ElasticSearch->_triggerFailedIndexError() in XenES/Search/SourceHandler/ElasticSearch.php at line 76
XenES_Search_SourceHandler_ElasticSearch->finalizeRebuildSet() in XenForo/Search/Indexer.php at line 125
XenForo_Search_Indexer->finalizeRebuildSet() in XenForo/Deferred/SearchIndex.php at line 76
XenForo_Deferred_SearchIndex->execute() in XenForo/Model/Deferred.php at line 295
XenForo_Model_Deferred->runDeferred() in XenForo/Model/Deferred.php at line 429
XenForo_Model_Deferred->_runInternal() in XenForo/Model/Deferred.php at line 374
XenForo_Model_Deferred->run() in XenForo/ViewRenderer/Abstract.php at line 352
XenForo_ViewRenderer_Abstract::hasManualDeferredToRun() in XenForo/ViewRenderer/HtmlAdmin.php at line 130
XenForo_ViewRenderer_HtmlAdmin->renderContainer() in XenForo/FrontController.php at line 637
XenForo_FrontController->renderView() in XenForo/FrontController.php at line 158
XenForo_FrontController->run() in /var/www/mydomain.com/admin.php at line 13

Dynamic scripting is on.