Deflake TransactionStressTest.ExpiredTransactionDataRace1 (facebook#8258

)

Summary:
We saw the `Commit()` fail with "Operation expired" so apparently the
expiration time is too short. Increased the magnitude of the times in
this test to make flakiness less likely.

Pull Request resolved: facebook#8258

Reviewed By: jay-zhuang

Differential Revision: D28177033

Pulled By: ajkr

fbshipit-source-id: 0357acee6cc14c104b6ccd39231a683a606ab130

utilities/transactions/transaction_test.cc

@@ -5321,7 +5321,7 @@ TEST_P(TransactionStressTest, ExpiredTransactionDataRace1) {
 
         // Force txn1 to expire
         /* sleep override */
-        std::this_thread::sleep_for(std::chrono::milliseconds(150));
+        std::this_thread::sleep_for(std::chrono::milliseconds(1500));
 
         Transaction* txn2 = db->BeginTransaction(write_options, txn_options);
         Status s;
@@ -5337,7 +5337,7 @@ TEST_P(TransactionStressTest, ExpiredTransactionDataRace1) {
   WriteOptions write_options;
   TransactionOptions txn_options;
 
-  txn_options.expiration = 100;
+  txn_options.expiration = 1000;  // 1 second
   Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
 
   Status s;