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Home/ Questions/Q 1030073
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Editorial Team
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Editorial Team
Asked: May 16, 20262026-05-16T12:38:36+00:00 2026-05-16T12:38:36+00:00

I was creating a lucene index when my indexing program crashed. The indexer had

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I was creating a lucene index when my indexing program crashed. The indexer had processed about 3M documents before crashing, producing a 14GB file. When I opened the index in Luke (with force unlock), the whole index was gone!. poof.

The opened index had 0 documents and its size was reduced to 1kb. Did anyone experience this, or can offer an explanation

(Using Lucene.Net 2.9)

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  1. Editorial Team
    Editorial Team
    2026-05-16T12:38:36+00:00Added an answer on May 16, 2026 at 12:38 pm

    Most probably, your indexing code never called commit() before crashing. If you don’t want to lose all your changes, you should call commit() every X added documents.

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