E2E: Add a temporary workaround for MySQL tests

.config/nextest.toml

@@ -2,11 +2,25 @@
 fail-fast = false
 
 [test-groups]
+mysql = { max-threads = 1 } # Explanation below
 setup = { max-threads = 1 }  # Serialize the setup steps
 containerized = { max-threads = 8 }  # Don't use too much memory
 engine = { max-threads = 2 }  # Engine tests are very memory-hungry
 database = { max-threads = 8 }  # Don't use too much memory
 
+# TODO: Delete this workaround when this PR is merged:
+#       - Fix: nextest cleanup race condition by bonega
+#         https://github.com/launchbadge/sqlx/pull/3334
+#
+# NOTE: There is an incompatibility between nextest and sqlx:
+#       - nextest implies multiprocessing,
+#       - while sqlx has a lock on cleanup within the current process
+#         (https://github.com/launchbadge/sqlx/pull/2640#issuecomment-1659455042).
+[[profile.default.overrides]]
+filter = "test(::mysql::)"
+test-group = "mysql"
+retries = { count = 3, backoff = "exponential", delay = "3s" }
+
 [[profile.default.overrides]]
 filter = "test(::setup::)"
 test-group = "setup"

src/e2e/app/cli/common-macros/src/lib.rs

@@ -70,9 +70,7 @@ fn kamu_cli_e2e_test_impl(harness_method: &Ident, input: TokenStream) -> TokenSt
             }
         },
         "mysql" => quote! {
-            // flaky: when running in parallel, errors occur with table not found (or sporadic deadlocks),
-            //        restarting again solves the problem.
-            #[test_group::group(e2e, database, mysql, flaky, #extra_test_groups)]
+            #[test_group::group(e2e, database, mysql, #extra_test_groups)]
             #[test_log::test(sqlx::test(migrations = "../../../../../migrations/mysql"))]
             async fn #test_function_name (mysql_pool: sqlx::MySqlPool) {
                 KamuCliApiServerHarness::mysql(&mysql_pool, #options )