diff options
Diffstat (limited to 'jstests/concurrency/fsm_workloads/update_simple.js')
| -rw-r--r-- | jstests/concurrency/fsm_workloads/update_simple.js | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/jstests/concurrency/fsm_workloads/update_simple.js b/jstests/concurrency/fsm_workloads/update_simple.js index ae694ace309..85f877e6090 100644 --- a/jstests/concurrency/fsm_workloads/update_simple.js +++ b/jstests/concurrency/fsm_workloads/update_simple.js @@ -8,7 +8,9 @@ * - whether to $set or $unset its field * - what value to $set the field to */ -load('jstests/concurrency/fsm_workload_helpers/server_types.js'); // for isMongod and isMMAPv1 + +// For isMongod and supportsDocumentLevelConcurrency. +load('jstests/concurrency/fsm_workload_helpers/server_types.js'); var $config = (function() { @@ -55,13 +57,16 @@ var $config = (function() { assertResult: function assertResult(db, res) { assertAlways.eq(0, res.nUpserted, tojson(res)); - if (isMongod(db) && !isMMAPv1(db)) { - // For non-mmap storage engines we can have a strong assertion that exactly one - // doc will be modified. + if (isMongod(db) && supportsDocumentLevelConcurrency(db)) { + // Storage engines which support document-level concurrency will automatically + // retry any operations when there are conflicts, so we should always see a + // matching document. assertWhenOwnColl.eq(res.nMatched, 1, tojson(res)); } else { - // Zero matches are possible for MMAP v1 because the update will skip a document - // that was invalidated during a yield. + // On storage engines that do not support document-level concurrency, it is + // possible that the query will not find the document. This can happen if + // another thread updated the target document during a yield, triggering an + // invalidation. assertWhenOwnColl.contains(res.nMatched, [0, 1], tojson(res)); } |