SolrDedupServiceImpl: Error cleaning cris deduplication index: Cannot invoke "org.dspace.content.Item.getID()" because "item" is null

[saschaszott]

Description

In SolrDedupServiceImpl a NullPointerException is thrown while cleaning the dedup index.

Log message:

2026-02-05 13:35:27,594 INFO  unknown unknown org.dspace.app.batch.DedupClient @ Updating and Cleaning Index
2026-02-05 13:35:27,721 INFO  unknown unknown org.dspace.app.deduplication.service.impl.SolrDedupServiceImpl @ Deleting: b30eb4dd-e909-4c6e-a4a4-303f502152a7
2026-02-05 13:35:27,721 ERROR unknown unknown org.dspace.app.deduplication.service.impl.SolrDedupServiceImpl @ Error cleaning cris deduplication index: Cannot invoke "org.dspace.content.Item.getID()" because "item" is null
java.lang.NullPointerException: Cannot invoke "org.dspace.content.Item.getID()" because "item" is null
	at org.dspace.app.deduplication.service.impl.SolrDedupServiceImpl.unIndexContent(SolrDedupServiceImpl.java:533) ~[dspace-api-cris-2024.02.03.jar:cris-2024.02.03]
	at org.dspace.app.deduplication.service.impl.SolrDedupServiceImpl.cleanIndex(SolrDedupServiceImpl.java:642) [dspace-api-cris-2024.02.03.jar:cris-2024.02.03]
	at org.dspace.app.batch.DedupClient.main(DedupClient.java:157) [dspace-api-cris-2024.02.03.jar:cris-2024.02.03]

The problem is caused by this line where i is null:

DSpace/dspace-api/src/main/java/org/dspace/app/deduplication/service/impl/SolrDedupServiceImpl.java

Line 651 in 0288c36

unIndexContent(context, i);