[jira] [Updated] (CASSANDRA-14680) Built-in 2i implementation applies updates non-deterministically

["C. Scott Andreas (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-14680?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

C. Scott Andreas updated CASSANDRA-14680:
-----------------------------------------
    Component/s: Secondary Indexes

> Built-in 2i implementation applies updates non-deterministically
> ----------------------------------------------------------------
>
>                 Key: CASSANDRA-14680
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14680
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Secondary Indexes
>            Reporter: Chris Lohfink
>            Priority: Major
>             Fix For: 3.0.x, 3.11.x, 4.0.x
>
>
> Spotted by [~cnlwsu] during CASSANDRA-14664 review, and confirmed by me and [~beobal] separately.
> {{Keyspace.applyInternal()}} generates {{nowInSeconds}} from local time at the time of mutation application - which can happen at quite a delay from that mutation creation (think streaming path, hints, batchlog replay). That {{nowInSeconds}} value is later used by {{CassandraIndex}} {{Indexer}} to determine liveness of cells and also used for some of generated tombstones.
> Depending on when {{Keyspace.applyInternal()}} call happens, you'll see varying results in the internal 2i table, which sounds problematic. The values should be derived from the cells and liveness info in the partition updates exclusively.



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