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https://issues.apache.org/jira/browse/LUCENE-10431?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17499074#comment-17499074
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Adrien Grand commented on LUCENE-10431:
---------------------------------------
I wonder if the most immediate fix could consist of setting a flag when
hashCode() or equals() is called the first time and rejecting any calls to
setRewriteMethod after that, in order to better point users to where the
problem in their code is.
> AssertionError in BooleanQuery.hashCode()
> -----------------------------------------
>
> Key: LUCENE-10431
> URL: https://issues.apache.org/jira/browse/LUCENE-10431
> Project: Lucene - Core
> Issue Type: Bug
> Affects Versions: 8.11.1
> Reporter: Michael Bien
> Priority: Major
>
> Hello devs,
> the constructor of BooleanQuery can under some circumstances trigger a hash
> code computation before "clauseSets" is fully filled. Since BooleanClause is
> using its query field for the hash code too, it can happen that the "wrong"
> hash code is stored, since adding the clause to the set triggers its
> hashCode().
> If assertions are enabled the check in BooleanQuery, which recomputes the
> hash code, will notice it and throw an error.
> exception:
> {code:java}
> java.lang.AssertionError
> at org.apache.lucene.search.BooleanQuery.hashCode(BooleanQuery.java:614)
> at java.base/java.util.Objects.hashCode(Objects.java:103)
> at java.base/java.util.HashMap$Node.hashCode(HashMap.java:298)
> at java.base/java.util.AbstractMap.hashCode(AbstractMap.java:527)
> at org.apache.lucene.search.Multiset.hashCode(Multiset.java:119)
> at java.base/java.util.EnumMap.entryHashCode(EnumMap.java:717)
> at java.base/java.util.EnumMap.hashCode(EnumMap.java:709)
> at java.base/java.util.Arrays.hashCode(Arrays.java:4498)
> at java.base/java.util.Objects.hash(Objects.java:133)
> at
> org.apache.lucene.search.BooleanQuery.computeHashCode(BooleanQuery.java:597)
> at org.apache.lucene.search.BooleanQuery.hashCode(BooleanQuery.java:611)
> at java.base/java.util.HashMap.hash(HashMap.java:340)
> at java.base/java.util.HashMap.put(HashMap.java:612)
> at org.apache.lucene.search.Multiset.add(Multiset.java:82)
> at org.apache.lucene.search.BooleanQuery.<init>(BooleanQuery.java:154)
> at org.apache.lucene.search.BooleanQuery.<init>(BooleanQuery.java:42)
> at
> org.apache.lucene.search.BooleanQuery$Builder.build(BooleanQuery.java:133)
> {code}
> I noticed this while trying to upgrade the NetBeans maven indexer modules
> from lucene 5.x to 8.x https://github.com/apache/netbeans/pull/3558
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