From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp50.i.mail.ru (smtp50.i.mail.ru [94.100.177.110]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dev.tarantool.org (Postfix) with ESMTPS id 05BB14003E9 for ; Wed, 30 Oct 2019 00:20:22 +0300 (MSK) From: Ilya Kosarev Date: Wed, 30 Oct 2019 00:20:06 +0300 Message-Id: <20191029212006.23437-1-i.kosarev@tarantool.org> In-Reply-To: <20191029170219.GB29443@atlas> References: <20191029170219.GB29443@atlas> Subject: [Tarantool-patches] [PATCH v3] relay: fix join vclock obtainment in relay_initial_join List-Id: Tarantool development patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: tarantool-patches@freelists.org Cc: tarantool-patches@dev.tarantool.org, v.shpilevoy@tarantool.org join_vclock test could fail on huge load due to vclock advance comparing to an actual WAL. In order to fix this we updated wal_sync so that now we can obtain up to date vclock on the flushed state using it. It is also better to get max index and index count in single request in join_vclock test. With fixes mentioned above it is not fragile anymore. Closes #4160 --- https://github.com/tarantool/tarantool/tree/i.kosarev/gh-4160-fix-join-vclock https://github.com/tarantool/tarantool/issues/4160 src/box/relay.cc | 7 +++---- src/box/vinyl.c | 4 ++-- src/box/wal.c | 23 +++++++++++++++++------ src/box/wal.h | 3 ++- test/replication/join_vclock.result | 5 +---- test/replication/join_vclock.test.lua | 3 +-- test/replication/suite.ini | 1 - 7 files changed, 26 insertions(+), 20 deletions(-) diff --git a/src/box/relay.cc b/src/box/relay.cc index e849fcf4f..b9ed27503 100644 --- a/src/box/relay.cc +++ b/src/box/relay.cc @@ -307,13 +307,12 @@ relay_initial_join(int fd, uint64_t sync, struct vclock *vclock) /* * Sync WAL to make sure that all changes visible from - * the frozen read view are successfully committed. + * the frozen read view are successfully committed and + * obtain corresponding vclock. */ - if (wal_sync() != 0) + if (wal_sync(vclock) != 0) diag_raise(); - vclock_copy(vclock, &replicaset.vclock); - /* Respond to the JOIN request with the current vclock. */ struct xrow_header row; xrow_encode_vclock_xc(&row, vclock); diff --git a/src/box/vinyl.c b/src/box/vinyl.c index a2bbaa529..e160f3764 100644 --- a/src/box/vinyl.c +++ b/src/box/vinyl.c @@ -1087,7 +1087,7 @@ vinyl_space_check_format(struct space *space, struct tuple_format *format) */ int rc; if (need_wal_sync) { - rc = wal_sync(); + rc = wal_sync(NULL); if (rc != 0) goto out; } @@ -4168,7 +4168,7 @@ vinyl_space_build_index(struct space *src_space, struct index *new_index, */ int rc; if (need_wal_sync) { - rc = wal_sync(); + rc = wal_sync(NULL); if (rc != 0) goto out; } diff --git a/src/box/wal.c b/src/box/wal.c index 5e2c13e0e..6348ef456 100644 --- a/src/box/wal.c +++ b/src/box/wal.c @@ -519,21 +519,27 @@ wal_free(void) wal_writer_destroy(writer); } +struct wal_vclock_msg { + struct cbus_call_msg base; + struct vclock vclock; +}; + static int -wal_sync_f(struct cbus_call_msg *msg) +wal_sync_f(struct cbus_call_msg *data) { - (void)msg; + struct wal_vclock_msg *msg = (struct wal_vclock_msg *) data; struct wal_writer *writer = &wal_writer_singleton; if (writer->in_rollback.route != NULL) { /* We're rolling back a failed write. */ diag_set(ClientError, ER_WAL_IO); return -1; } + vclock_copy(&msg->vclock, &writer->vclock); return 0; } int -wal_sync(void) +wal_sync(struct vclock *vclock) { ERROR_INJECT(ERRINJ_WAL_SYNC, { diag_set(ClientError, ER_INJECTION, "wal sync"); @@ -541,18 +547,23 @@ wal_sync(void) }); struct wal_writer *writer = &wal_writer_singleton; - if (writer->wal_mode == WAL_NONE) + if (writer->wal_mode == WAL_NONE) { + if (vclock != NULL) + vclock_copy(vclock, &writer->vclock); return 0; + } if (!stailq_empty(&writer->rollback)) { /* We're rolling back a failed write. */ diag_set(ClientError, ER_WAL_IO); return -1; } bool cancellable = fiber_set_cancellable(false); - struct cbus_call_msg msg; + struct wal_vclock_msg msg; int rc = cbus_call(&writer->wal_pipe, &writer->tx_prio_pipe, - &msg, wal_sync_f, NULL, TIMEOUT_INFINITY); + &msg.base, wal_sync_f, NULL, TIMEOUT_INFINITY); fiber_set_cancellable(cancellable); + if (vclock != NULL) + vclock_copy(vclock, &msg.vclock); return rc; } diff --git a/src/box/wal.h b/src/box/wal.h index b76b0a41f..827b0fb85 100644 --- a/src/box/wal.h +++ b/src/box/wal.h @@ -182,9 +182,10 @@ wal_mode(); /** * Wait until all submitted writes are successfully flushed * to disk. Returns 0 on success, -1 if write failed. + * Corresponding vclock is returned in @vclock unless it is NULL. */ int -wal_sync(void); +wal_sync(struct vclock *vclock); struct wal_checkpoint { struct cbus_call_msg base; diff --git a/test/replication/join_vclock.result b/test/replication/join_vclock.result index a9781073d..d6d9af783 100644 --- a/test/replication/join_vclock.result +++ b/test/replication/join_vclock.result @@ -67,10 +67,7 @@ test_run:cmd("switch replica1") --- - true ... -cnt = box.space.test.index[0]:count() ---- -... -box.space.test.index.primary:max()[1] == cnt - 1 +box.space.test.index.primary:max()[1] == box.space.test.index.primary:count() - 1 --- - true ... diff --git a/test/replication/join_vclock.test.lua b/test/replication/join_vclock.test.lua index 0b60dffc2..a813ba31f 100644 --- a/test/replication/join_vclock.test.lua +++ b/test/replication/join_vclock.test.lua @@ -26,8 +26,7 @@ ch:get() errinj.set("ERRINJ_RELAY_FINAL_SLEEP", false) test_run:cmd("switch replica1") -cnt = box.space.test.index[0]:count() -box.space.test.index.primary:max()[1] == cnt - 1 +box.space.test.index.primary:max()[1] == box.space.test.index.primary:count() - 1 test_run:cmd("switch default") replica_set.drop_all(test_run) diff --git a/test/replication/suite.ini b/test/replication/suite.ini index 384dac677..ed1de3140 100644 --- a/test/replication/suite.ini +++ b/test/replication/suite.ini @@ -12,7 +12,6 @@ long_run = prune.test.lua is_parallel = True pretest_clean = True fragile = errinj.test.lua ; gh-3870 - join_vclock.test.lua ; gh-4160 long_row_timeout.test.lua ; gh-4351 skip_conflict_row.test.lua ; gh-4457 sync.test.lua ; gh-3835 gh-3877 -- 2.17.1