}
/**
- * This function commits all DB changes as needed before
- * the user can receive a response (in case commit fails)
+ * This function commits all DB and session changes as needed *before* the
+ * client can receive a response (in case DB commit fails) and thus also before
+ * the response can trigger a subsequent related request by the client
+ *
+ * If there is a significant amount of content to flush, it can be done in $postCommitWork
*
* @param IContextSource $context
* @param callable|null $postCommitWork [default: null]
// Run updates that need to block the user or affect output (this is the last chance)
DeferredUpdates::doUpdates( 'enqueue', DeferredUpdates::PRESEND );
wfDebug( __METHOD__ . ': pre-send deferred updates completed' );
+ // T214471: persist the session to avoid race conditions on subsequent requests
+ $request->getSession()->save();
// Should the client return, their request should observe the new ChronologyProtector
// DB positions. This request might be on a foreign wiki domain, so synchronously update