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| author | Daniel Gottlieb <daniel.gottlieb@mongodb.com> | 2019-11-26 04:48:50 +0000 |
|---|---|---|
| committer | evergreen <evergreen@mongodb.com> | 2019-11-26 04:48:50 +0000 |
| commit | d471957fc37ef6cafe9ffeda3e231cdc871c3ce3 (patch) | |
| tree | 3435c9d9420243e350da0f3dfbeecb81afbcd264 /src/mongo/db/pipeline/document_source_cursor.cpp | |
| parent | 8b0f534a706005d366e200ee56af5c76217656b2 (diff) | |
| download | mongo-d471957fc37ef6cafe9ffeda3e231cdc871c3ce3.tar.gz | |
SERVER-43859: Take MODE_IX locks for collection creation.
Two concurrent storage transactions can now create collections with the same
collection name. These transactions will conflict at commit time; the first
committer will win and register their collection into the global catalog. The
losing transactions will bubble a WriteConflictException.
Top-level callers that should fail if the collection already existed must now
check and fail with a NamespaceExists error code. Previously, those callers
could rely on lower level code returning the NamespaceExists error.
Callers that were implicitly creating a collection may retry the operation,
using the now-registered collection.
These transaction-local collections (UncommittedCollections) are returned when
doing any CollectionCatalog::lookup* call.
Diffstat (limited to 'src/mongo/db/pipeline/document_source_cursor.cpp')
| -rw-r--r-- | src/mongo/db/pipeline/document_source_cursor.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mongo/db/pipeline/document_source_cursor.cpp b/src/mongo/db/pipeline/document_source_cursor.cpp index c2f9c9d1a8d..bf576960b20 100644 --- a/src/mongo/db/pipeline/document_source_cursor.cpp +++ b/src/mongo/db/pipeline/document_source_cursor.cpp @@ -185,7 +185,7 @@ Value DocumentSourceCursor::serialize(boost::optional<ExplainOptions::Verbosity> AutoGetDb dbLock(opCtx, _exec->nss().db(), lockMode); Lock::CollectionLock collLock(opCtx, _exec->nss(), lockMode); auto collection = dbLock.getDb() - ? CollectionCatalog::get(opCtx).lookupCollectionByNamespace(_exec->nss()) + ? CollectionCatalog::get(opCtx).lookupCollectionByNamespace(opCtx, _exec->nss()) : nullptr; Explain::explainStages(_exec.get(), |