Sphinx breaks, invalid xml?

Question

Sphinx

Hello!
There is a base in mongoDB. With the help of javascript, I collect xml, which I feed to sphinx (Sphinx 2.2.10-id64-release (2c212e0)) so that it indexes the data in the mong. The whole process was debugged and everything worked like clockwork. But all of a sudden, for no reason at all, such errors began to appear:

ERROR: index 'my_data_index': source 'my_data': XML parse error: no element found (line=1488774, pos=0, docid=24557554).

I look at xml at line 1488774:

$ mongo my_db --quiet parse_index.js | grep -n '' | egrep '^1488774' -A8 -B9        
1488765:<sphinx:document id="24557554"> 
1488766:    <last_name>Иванова</last_name> 
1488767:    <first_name>Мария</first_name> 
1488768:    <middle_name>Владимировна</middle_name> 
1488769:    <bdate>41</bdate> 
1488770:    <bmonth>1</bmonth> 
1488771:    <byear>1975</byear> 
1488772:    <city>Санкт-Петербург</city> 
1488773:</sphinx:document> 
1488774:<sphinx:document id="24557584"> 
1488775:    <last_name>Петров</last_name> 
1488776:    <first_name>Дмитрий</first_name> 
1488777:    <middle_name>Иванович</middle_name> 
1488778:    <bdate>14</bdate> 
1488779:    <bmonth>9</bmonth> 
1488780:    <byear>1993</byear> 
1488781:    <city>Москва</city> 
1488782:</sphinx:document>

Everything worked before. Nothing has changed, no updates have been made. We just launched indexer and everything started to break.
Any ideas?

Answer 1

Everything worked before. Nothing has changed, no updates have been made. We just launched indexer and everything started to break.
Any ideas?

Faced. Diagnosing this problem with Sphinx is laconic, unfortunately.
Take a look at the XML standard.
Well, or do not write directly to XML as a text file, but write to XML through a specialized library that can work correctly with XML.