Referral attrs: An error occurred while attempting to perform index rebuild: NullPointerException(LocalizableMessage.java:103)

[vharseko]

Discussed in #536

^{Originally posted by @pabloisaak July 30, 2025}
Hello,

I'm running:

`Version: OpenDJ Server 4.10.0

Java Version: 1.8.0_462`

I'm attempting to do an index rebuild. I've tried to rebuild all and single indexes. I am getting the following error:

30/Jul/2025:10:44:44 -0500] severity="NOTICE" msgCount=16 msgID=org.opends.messages.backend-542 message="Rebuild of index(es) uid.caseIgnoreMatch started with 561181 total entries to process"
[30/Jul/2025:10:44:44 -0500] severity="NOTICE" msgCount=17 msgID=org.opends.messages.backend-528 message="The amount of free memory available to the import task is 2475373363 bytes. The number of phase one buffers required is 4 buffers"
[30/Jul/2025:10:44:44 -0500] severity="NOTICE" msgCount=18 msgID=org.opends.messages.backend-520 message="Setting DB cache size to 33554432 bytes and phase one buffer size to 185653002 bytes"
[30/Jul/2025:10:45:03 -0500] severity="ERROR" msgCount=19 msgID=org.opends.messages.tool-852 message="An error occurred while attempting to perform index rebuild: NullPointerException(LocalizableMessage.java:103)"
[30/Jul/2025:10:45:03 -0500] severity="NOTICE" msgCount=20 msgID=org.opends.messages.backend-414 message="Rebuild Index task 20250730104443503 finished execution in the state Stopped by error"
Rebuild Index task 20250730104443503 did not complete successfully

I have tried to enable debug logs, but not seeing much there either. Any guidance would be appreaciated.

sample data: https://github.com/user-attachments/files/21667025/public_test.ldif.txt

[vharseko]

@pabloisaak please check artifact from https://github.com/OpenIdentityPlatform/OpenDJ/actions/runs/16837684379