After the migration to OTRS 6 I see constantly the error of the Worker that rebuilds the Index.
Indicates that you can not build the DateTime object but I do not know the reason for it
ERROR: OTRS-otrs.Console.pl-Maint::Ticket::FulltextIndexRebuildWorker-01 Perl: 5.16.3 OS: linux Time: Tue Feb 27 15:10:41 2018
Message: Error creating DateTime object.
Traceback (9498):
Module: Kernel::System::DateTime::new Line: 154
Module: Kernel::System::ObjectManager::_ObjectBuild Line: 306
Module: Kernel::System::ObjectManager::Create Line: 241
Module: Kernel::System::Ticket::TicketGet Line: 1339
Module: Kernel::System::Ticket::TicketArchiveFlagGet Line: 4040
Module: Kernel::System::Console::Command::Maint::Ticket::FulltextIndexRebuildWorker::ArticleIndexRebuild Line: 168
Module: Kernel::System::Console::Command::Maint::Ticket::FulltextIndexRebuildWorker::Run Line: 103
Module: (eval) Line: 460
Module: Kernel::System::Console::BaseCommand::Execute Line: 454
Module: Kernel::System::Console::InterfaceConsole::Run Line: 80
Error: Can't call method "Delta" on an undefined value at /opt/otrs/Kernel/System/Ticket.pm line 1346.
The error appears when I execute it manually as waiting for the CronSchulder to execute it. As a major background run a FullTextIndex rebuild and the process is stuck in 74.8%.