Merge prohibited due to updated MVA


I am unable to merge some of my indexes. I use the typical main+delta indexes scenario where I want to merge delta into main. Main indexes are sometimes updated using UpdateAttributes(). I got the following error when trying to merge:

$ sudo -u manticore indexer --rotate --merge tur_main_index tur_delta_index
Manticore 2.8.2 4e81114d@190402 release
Copyright (c) 2001-2016, Andrew Aksyonoff
Copyright (c) 2008-2016, Sphinx Technologies Inc (
Copyright (c) 2017-2019, Manticore Software LTD (

using config file '/etc/sphinxsearch/sphinx.conf'...
merging index 'tur_delta_index' into index 'tur_main_index'...
ERROR: index 'tur_main_index': merge prohibited due to updated MVA.

It looks like this error happens when an mvp file is present and I can see an mvp file for that index /var/manticore/indices/tur_main.mvp. I tried to run “FLUSH ATTRIBUTES;” from the SphinxQL command line, same merge error. I tried to gracefully stop searchd, same merge error. I tried to remove the mvp files, and I got a segfault. Eventually I recreated the main index.

How can I handle this situation without recreating the main index?


in version 2.8 there is no way to merge indexes with updated MVA attributes - there is no code for that.

However that case was fixed in 3.x version you could switch to that to get issue fixed.