diff options
Diffstat (limited to 'src/mongo/db/op_observer/op_observer.h')
| -rw-r--r-- | src/mongo/db/op_observer/op_observer.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/src/mongo/db/op_observer/op_observer.h b/src/mongo/db/op_observer/op_observer.h index 2e55e918a33..ed9a4213af6 100644 --- a/src/mongo/db/op_observer/op_observer.h +++ b/src/mongo/db/op_observer/op_observer.h @@ -521,11 +521,20 @@ public: Date_t wallClockTime) = 0; /** - * This is called when a transaction transitions into prepare while it is not primary. Example - * case can include secondary oplog application or when node was restared and tries to - * recover prepared transactions from the oplog. + * This method is called when a transaction transitions into prepare while it is not primary, + * e.g. during secondary oplog application or recoverying prepared transactions from the + * oplog after restart. The method explicitly requires a session id (i.e. does not use the + * session id attached to the opCtx) because transaction oplog application currently applies the + * oplog entries for each prepared transaction in multiple internal sessions acquired from the + * InternalSessionPool. Currently, those internal sessions are completely unrelated to the + * session for the transaction itself. For a non-retryable internal transaction, not using the + * transaction session id in the codepath here can cause the opTime for the transaction to + * show up in the chunk migration opTime buffer although the writes they correspond to are not + * retryable and therefore are discarded anyway. + * */ virtual void onTransactionPrepareNonPrimary(OperationContext* opCtx, + const LogicalSessionId& lsid, const std::vector<repl::OplogEntry>& statements, const repl::OpTime& prepareOpTime) = 0; |