Simon Willnauer created LUCENE-6019:
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Summary: IndexWriter allows to add same field with different
docvlaues type
Key: LUCENE-6019
URL: https://issues.apache.org/jira/browse/LUCENE-6019
Project: Lucene - Core
Issue Type: Bug
Components: core/index
Affects Versions: 4.10.1
Reporter: Simon Willnauer
Priority: Critical
Fix For: 4.10.2, 5.0
IndexWriter checks if the DV types are consitent in multiple places but if due
to some problems in Elasticsearch users where able to add the same field with
different DV types causing merges to fail. Yet I was able to reduce this to a
lucene testcase but I was puzzled since it always failed. Yet, I had to run it
without assertions and that cause the bug to happen. I can add field foo with
BINARY and SORTED_SET causing a merge to fail. Here is a gist
https://gist.github.com/s1monw/8707f924b76ba40ee5f3 /
https://github.com/elasticsearch/elasticsearch/issues/8009
While this is certainly a problem in Elasticsearch Lucene also allows to
corrupt an index due to user error which I think should be prevented. NOTE:
this only fails if you run without assertions which I think lucene should do in
CI once in a while too.
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