Marvin created OAK-12051:
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Summary: Sorting Unions by Score: NullPointerException
Key: OAK-12051
URL: https://issues.apache.org/jira/browse/OAK-12051
Project: Jackrabbit Oak
Issue Type: Bug
Components: query
Reporter: Marvin
With ticket OAK-11949 we introduced the feature that union queries are sorted
by score, instead of simply concatenating them. However, turning on the feature
toggle causes NullPointerExceptions in some rare cases. The problem occurs if
there is a score column, but accessing a score of that column returns Null.
This can happen if, for example, there is a union between three queries, of
which at least one has scores, and at least one doesn't have, and those two
results are merged first.
{code:java}
This happens when the product tests make the following request
/libs/granite/security/search/authorizables.json?offset=0&query=%7B"condition"%3A%5B%7B"named"%3A"testGroup07fe1bae-63c5-4fb1-8924-a345f2f4451c"%7D%5D%7D
and fails consistently causing CreatePageAsAuthorUserIT#testCreatePageAsAuthor
to fail. Query that fails:[rep:Authorizable] as [a] /* property authorizableId
indexDefinition: /oak:index/authorizableId values:
'testGroup07fe1bae-63c5-4fb1-8924-a345f2f4451c' estimatedCost: 2.0 */ union
[rep:Authorizable] as [a] /* property principalName indexDefinition:
/oak:index/principalName values:
'testGroup07fe1bae-63c5-4fb1-8924-a345f2f4451c' estimatedCost: 2.0 */ union
[rep:Authorizable] as [a] /* lucene:authorizables indexDefinition:
/oak:index/authorizables estimatedEntries: 167 luceneQuery: :ancestors:/home */
{code}
{code:java}
[52.177.162.196 [1767767494687] GET
/libs/granite/security/search/authorizables.json HTTP/1.1]
org.apache.sling.servlets.resolver.internal.SlingServletResolver Original error
class java.lang.NullPointerException java.lang.NullPointerException: Cannot
invoke
"org.apache.jackrabbit.oak.api.PropertyValue.getValue(org.apache.jackrabbit.oak.api.Type)"
because "scoreValue" is null at
org.apache.jackrabbit.oak.query.UnionQueryImpl.getScoreFromRow(UnionQueryImpl.java:578)
[org.apache.jackrabbit.oak-core:1.88.0.T20251029163355-5d5086d] at
org.apache.jackrabbit.oak.query.UnionQueryImpl$2.compare(UnionQueryImpl.java:564)
[org.apache.jackrabbit.oak-core:1.88.0.T20251029163355-5d5086d] at
org.apache.jackrabbit.oak.query.UnionQueryImpl$2.compare(UnionQueryImpl.java:561)
[org.apache.jackrabbit.oak-core:1.88.0.T20251029163355-5d5086d] {code}
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