[GitHub] [lucene-solr] tizianodeg commented on pull request #2136: SOLR-15037: fix prevent config change listener to reload core while s…

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tizianodeg commented on pull request #2136:
URL: https://github.com/apache/lucene-solr/pull/2136#issuecomment-758328108


   @madrob I modified TestManagedSchemaAPI to reproduce the issue, feel free to propose a better location or approach. 
   
   It's hard to reproduce this issue with a small schema. My current approach was to add 100 times 100 fields. Adding more complex field types (with normalizer loading files) my fail faster, but results also in a more complex test.
   Somehow it is also related to multi schema updates, as I could not reproduce it with single field changes. I suppose there are more frequent writes to zookeeper, producing more change notifications while the schema is updated. 
   
   I have tested it with java 8 and 11 both will produce an  "Unknown field" around field 5000 on a Intel(R) Core(TM) i7-7800X CPU @ 3.50GHz   3.50 GHz with SSD drives. If it doesn't fail on your machine try to increase the numbers of fields in one batch. 
   


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