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From "Simon Helsen (Reopened) (JIRA)" <>
Subject [jira] [Reopened] (JENA-97) TDB 0.9.0 snapshot sometimes returns a SELECT binding twice
Date Thu, 06 Oct 2011 21:31:30 GMT


Simon Helsen reopened JENA-97:

After all the fixes for Jena-91, the only remaining issue is thatin Tx-TDB, a select binding
sometimes occurs more than once. I haven no reproducing and runnable test case, but I will
try to produce a file with the quads and an accompanying query which illustrates the problem
> TDB 0.9.0 snapshot sometimes returns a SELECT binding twice
> -----------------------------------------------------------
>                 Key: JENA-97
>                 URL:
>             Project: Jena
>          Issue Type: Bug
>          Components: TDB
>         Environment: tx-tdb-0.9.0-20110809.130753-7 
>            Reporter: Simon Helsen
>            Assignee: Andy Seaborne
>            Priority: Critical
> Very sometimes (rare), it seems that a result set will repeat the first SELECT binding.
> SELECT ?a ?b ...
> will bind ?a twice in the result set. It only happens quite rarely, but the same queries
behave correctly in TDB 0.8.7 . I suspect they may be caused by the corruptions mentioned

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