Index Build Keeps Restarting

I’m trying to build an index on a bucket with 200M records (around 1.5TiB size). The index builds up to some percentage like 50% to 60% and then restarts from 0%. This cycle keeps repeating endlessly.
What I’ve Tried

  • Increased RAM allocation for index service

  • Verified plenty of disk space available

    Why does the index build restart instead of completing?

There might be information in logs/indexer.log