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  1. Solr
  2. SOLR-15290

Better Docs/Tests/Warnings/Defaults for SignatureUpdateProcessorFactory in SolrCloud

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    Details

    • Type: Task
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
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      Description

      I was recently helping someone who had very weird symptoms of replicas getting out of sync, that turned out to be because of using SignatureUpdateProcessorFactory to "de-duplicate" documents that had different unique keys, but identical computed "signatures".

      Although they had customized the fields configuration of SignatureUpdateProcessorFactory, most of the (bad) behavior came from the defaults:

            overwriteDupes = params.getBool("overwriteDupes", true);
            signatureField = params.get("signatureField", "signatureField");
      

      ...in spite of the fact that this combination does not – and has never – worked with SolrCloud: SOLR-3473

      I'm opening this issue to serve as a Parent for a few Sub-Tasks. Some of which I hope to takle imminently, and some of which are just ideas for the future.

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            • Assignee:
              Unassigned
              Reporter:
              hossman Chris M. Hostetter

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              • Created:
                Updated:

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