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  1. IMPALA
  2. IMPALA-4773

Supportability improvements for IMPALA-4765

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Details

    • Bug
    • Status: Open
    • Minor
    • Resolution: Unresolved
    • Impala 2.8.0
    • None
    • Catalog

    Description

      The patch for addressing IMPALA-4765 introduced a new critical data structure 'tableLoadingBarrier_' to prevent using multiple table-loading threads for the same table.

      However, the following bug might be difficult to detect with the current logging//metrics. If for some reason an entry in the 'tableLoadingBarrier_' is never removed then that table will never again be loaded and all queries waiting for that table will hang (and will not be cancellable, see IMPALA-915). The only remedy is to restart the catalogd.

      We should carefully consider the above possibility and how to debug/identify it from logs, and perhaps enhance the logging.

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            Unassigned Unassigned
            alex.behm Alexander Behm
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            Dates

              Created:
              Updated: