Hi,
I am running Version 7.9.7 in a VirtualBox on Ubuntu 16.04 server / Ubuntu 16.04 server.
Daily backups are a breeze. ( Thank you ‘pgr’!)
Until today. 
As usual, I stopped the server in VB, backed up the directory, re-started, and boom. The Global Search, which our sales people use to scan the contents of Notes, does not produce anything at all. I have no idea what of what happened.
I am getting some "FATAL’ errors in the log file.
Could someone take a look, please? Thanks!
Here is what I see in the log file, repeating every once in a while:
Wed Nov 28 10:16:00 2018 [830][da418dbc-fcbc-b3fd-207b-5baa761b1004][FATAL] Exception handling in /var/www/html/InuitGalleryOfVancouverCRM/include/MVC/Controller/SugarController.php:402
Wed Nov 28 10:16:00 2018 [830][da418dbc-fcbc-b3fd-207b-5baa761b1004][FATAL] Exception in Controller: File ‘modules/AOD_Index/Index/Index/segments_1842’ is not readable.
Wed Nov 28 10:16:00 2018 [830][da418dbc-fcbc-b3fd-207b-5baa761b1004][FATAL] backtrace:
#0 /var/www/html/InuitGalleryOfVancouverCRM/modules/AOD_Index/Lib/Zend/Search/Lucene/Storage/Directory/Filesystem.php(359): Zend_Search_Lucene_Storage_File_Filesystem->__construct(‘modules/AOD_Ind…’)
#1 /var/www/html/InuitGalleryOfVancouverCRM/modules/AOD_Index/Lib/Zend/Search/Lucene.php(412): Zend_Search_Lucene_Storage_Directory_Filesystem->getFileObject(‘segments_1842’)
#2 /var/www/html/InuitGalleryOfVancouverCRM/modules/AOD_Index/Lib/Zend/Search/Lucene.php(570): Zend_Search_Lucene->_readSegmentsFile()
#3 /var/www/html/InuitGalleryOfVancouverCRM/modules/AOD_Index/AOD_Index.php(342): Zend_Search_Lucene->__construct(‘modules/AOD_Ind…’)
#4 /var/www/html/InuitGalleryOfVancouverCRM/modules/AOD_Index/AOD_Index.php(74): AOD_Index->getLuceneIndex()
#5 /var/www/html/InuitGalleryOfVancouverCRM/modules/Home/UnifiedSearch.php(225): AOD_Index->find(‘abby quartin’)
#6 /var/www/html/InuitGalleryOfVancouverCRM/modules/Home/UnifiedSearch.php(83): doSearch(Object(AOD_Index), ‘abby quartin’, 0, 20)
#7 /var/www/html/InuitGalleryOfVancouverCRM/include/MVC/View/SugarView.php(791): include_once(’/var/www/html/I…’)
#8 /var/www/html/InuitGalleryOfVancouverCRM/include/MVC/View/views/view.classic.php(74): SugarView->includeClassicFile(‘modules/Home/Un…’)
#9 /var/www/html/InuitGalleryOfVancouverCRM/include/MVC/View/SugarView.php(199): ViewClassic->display()
#10 /var/www/html/InuitGalleryOfVancouverCRM/include/MVC/Controller/SugarController.php(432): SugarView->process()
#11 /var/www/html/InuitGalleryOfVancouverCRM/include/MVC/Controller/SugarController.php(375): SugarController->processView()
#12 /var/www/html/InuitGalleryOfVancouverCRM/include/MVC/SugarApplication.php(105): SugarController->execute()
#13 /var/www/html/InuitGalleryOfVancouverCRM/index.php(52): SugarApplication->execute()
#14 {main}
Wed Nov 28 10:16:04 2018 [3250][1][FATAL] Job ea71e46e-d9d0-7269-4491-5bfedbcb6686 (Perform Lucene Index) failed in CRON run
Wed Nov 28 10:17:02 2018 [3265][1][FATAL] Job 2e0d303e-7205-f109-6dbd-5bfedb2e6659 (Optimise AOD Index) failed in CRON run
Wed Nov 28 10:18:05 2018 [3282][1][FATAL] Job 21636fba-924d-a5f6-6b18-5bfedb98497d (Perform Lucene Index) failed in CRON run
Wed Nov 28 10:19:01 2018 [3292][1][FATAL] Job 4f33e81c-a744-407e-0320-5bfedb0763e3 (Optimise AOD Index) failed in CRON run
Wed Nov 28 10:20:05 2018 [3302][1][FATAL] Job 74aa172d-bd8a-658a-d65b-5bfedc04d254 (Perform Lucene Index) failed in CRON run
Wed Nov 28 10:21:01 2018 [3312][1][FATAL] Job a9fafa8c-7683-cf2a-a81a-5bfedc45fcc5 (Optimise AOD Index) failed in CRON run
Wed Nov 28 10:22:05 2018 [3321][1][FATAL] Job 7fd939b5-c612-5767-b03d-5bfedc922ddb (Perform Lucene Index) failed in CRON run
Wed Nov 28 10:23:01 2018 [3333][1][FATAL] Job b47d4ec5-0ab2-c893-7a16-5bfedccbb1cd (Optimise AOD Index) failed in CRON run
Wed Nov 28 10:24:05 2018 [3344][1][FATAL] Job 86650920-fb3c-fa7a-192b-5bfedd7df382 (Perform Lucene Index) failed in CRON run
Wed Nov 28 10:25:01 2018 [3357][1][FATAL] Job b5efb097-fff4-b5f2-ade4-5bfedd38c9fd (Optimise AOD Index) failed in CRON run
Wed Nov 28 10:26:05 2018 [3367][1][FATAL] Job 8a47f96d-ca83-e3de-fd78-5bfedd54f65f (Perform Lucene Index) failed in CRON run
Wed Nov 28 10:27:01 2018 [3377][1][FATAL] Job bb167a65-5e36-c166-a93e-5bfeddf2d3b2 (Optimise AOD Index) failed in CRON run
Wed Nov 28 10:28:05 2018 [3388][1][FATAL] Job 9e4a8740-c8a0-4a4e-6ffc-5bfedda16365 (Perform Lucene Index) failed in CRON run
Wed Nov 28 10:29:01 2018 [3398][1][FATAL] Job d8473c0d-34bf-2376-3124-5bfedeebbfc3 (Optimise AOD Index) failed in CRON run
Wed Nov 28 10:30:05 2018 [3408][1][FATAL] Job c888abe7-7f6b-5944-1d07-5bfede4cf8bc (Perform Lucene Index) failed in CRON run
Wed Nov 28 10:31:01 2018 [3421][1][FATAL] Job a50f0e55-032d-9ac5-2041-5bfedea9c158 (Optimise AOD Index) failed in CRON run
Wed Nov 28 10:32:05 2018 [3432][1][FATAL] Job d549082a-cbad-51f2-cf59-5bfede09a7ff (Perform Lucene Index) failed in CRON run
Wed Nov 28 10:33:01 2018 [3443][1][FATAL] Job 1c1dc103-c2a5-0e83-d51c-5bfedf298871 (Optimise AOD Index) failed in CRON run