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Robert Stupp commented on CASSANDRA-7371: ----------------------------------------- Do you need a unit test? > DELETEs get lost > ---------------- > > Key: CASSANDRA-7371 > URL: https://issues.apache.org/jira/browse/CASSANDRA-7371 > Project: Cassandra > Issue Type: Bug > Components: Core > Environment: 2.1 git branch since merge commit > 029cd403172f8cc1b96f0828c8e1f8f6d57c0bcc ("Fix rare potential NPE in HHOM > page size calculation") > Reporter: Robert Stupp > Assignee: Aleksey Yeschenko > Priority: Blocker > Fix For: 2.1.0 > > > The mentioned commit (merged to 2.1 from 1.2 via 2.0) introduced a bug which > is not easy to reproduce: > Workload description: > - One INSERT into a table > - multiple concurrent SELECTs against different tables (one select returns a > result) > - One UPDATE against the same table as the INSERT > - (same) multiple concurrent SELECTs against different tables (one select > returns a result) > - One DELETE against the same table as the INSERT > - (same) multiple concurrent SELECTs against different tables > Expected is that the last bunch of SELECTs returns no result. But since > commit SHA the DELETE gets not processed. > To clarify - the DELETE is not delayed - it is not executed at all. > Checked against a single node C* "cluster". > The above works with 2.0.8 and against 2.1.0-* - but not C* code since git > commit 029cd403172f8cc1b96f0828c8e1f8f6d57c0bcc ("Fix rare potential NPE in > HHOM page size calculation") from June, 5th. > I am not sure whether this bug also occurs in 1.2 or 2.0 branches (didn't > check that). > It is not always reproducible - approx 1 of 50 tries run into this issue. > If you have difficulties in finding the reason, I can provide a unit test for > that. -- This message was sent by Atlassian JIRA (v6.2#6252)