[WT-6934] Fix __wt_hs_upd_find wrongly returns WT_NOTFOUND - MongoDB Jira

XML

Word

Printable

JSON

History store update search (__wt_hs_upd_find) can wrongly return WT_NOTFOUND due to an unused local variable.

    if (ret == 0) {

        /* Couldn't find a record. */

        if (upd == NULL) {

            ret = WT_NOTFOUND;

            WT_STAT_CONN_INCR(session, cache_hs_read_miss);

            WT_STAT_DATA_INCR(session, cache_hs_read_miss);

        } else {

            WT_STAT_CONN_INCR(session, cache_hs_read);

            WT_STAT_DATA_INCR(session, cache_hs_read);

Here upd is initialized to NULL and never assigned apart from being used as a temporary variable when freeing the remaining modify updates.

is depended on by

WT-6504 Don't fallback to onpage value as base value if we see the onpage value in the history store