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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#include <atomic>
#include <memory>
#include <thread>
#include <vector>
#include "db/db_test_util.h"
#include "db/write_batch_internal.h"
#include "db/write_thread.h"
#include "port/port.h"
#include "port/stack_trace.h"
#include "util/fault_injection_test_env.h"
#include "util/string_util.h"
#include "util/sync_point.h"
namespace rocksdb {
// Test variations of WriteImpl.
class DBWriteTest : public DBTestBase, public testing::WithParamInterface<int> {
public:
DBWriteTest() : DBTestBase("/db_write_test") {}
Options GetOptions() { return DBTestBase::GetOptions(GetParam()); }
void Open() { DBTestBase::Reopen(GetOptions()); }
};
// It is invalid to do sync write while disabling WAL.
TEST_P(DBWriteTest, SyncAndDisableWAL) {
WriteOptions write_options;
write_options.sync = true;
write_options.disableWAL = true;
ASSERT_TRUE(dbfull()->Put(write_options, "foo", "bar").IsInvalidArgument());
WriteBatch batch;
ASSERT_OK(batch.Put("foo", "bar"));
ASSERT_TRUE(dbfull()->Write(write_options, &batch).IsInvalidArgument());
}
TEST_P(DBWriteTest, IOErrorOnWALWritePropagateToWriteThreadFollower) {
constexpr int kNumThreads = 5;
std::unique_ptr<FaultInjectionTestEnv> mock_env(
new FaultInjectionTestEnv(Env::Default()));
Options options = GetOptions();
options.env = mock_env.get();
Reopen(options);
std::atomic<int> ready_count{0};
std::atomic<int> leader_count{0};
std::vector<port::Thread> threads;
mock_env->SetFilesystemActive(false);
// Wait until all threads linked to write threads, to make sure
// all threads join the same batch group.
SyncPoint::GetInstance()->SetCallBack(
"WriteThread::JoinBatchGroup:Wait", [&](void* arg) {
ready_count++;
auto* w = reinterpret_cast<WriteThread::Writer*>(arg);
if (w->state == WriteThread::STATE_GROUP_LEADER) {
leader_count++;
while (ready_count < kNumThreads) {
// busy waiting
}
}
});
SyncPoint::GetInstance()->EnableProcessing();
for (int i = 0; i < kNumThreads; i++) {
threads.push_back(port::Thread(
[&](int index) {
// All threads should fail.
auto res = Put("key" + ToString(index), "value");
if (options.manual_wal_flush) {
ASSERT_TRUE(res.ok());
// we should see fs error when we do the flush
// TSAN reports a false alarm for lock-order-inversion but Open and
// FlushWAL are not run concurrently. Disabling this until TSAN is
// fixed.
// res = dbfull()->FlushWAL(false);
// ASSERT_FALSE(res.ok());
} else {
ASSERT_FALSE(res.ok());
}
},
i));
}
for (int i = 0; i < kNumThreads; i++) {
threads[i].join();
}
ASSERT_EQ(1, leader_count);
// Close before mock_env destruct.
Close();
}
TEST_P(DBWriteTest, ManualWalFlushInEffect) {
Options options = GetOptions();
Reopen(options);
// try the 1st WAL created during open
ASSERT_TRUE(Put("key" + ToString(0), "value").ok());
ASSERT_TRUE(options.manual_wal_flush != dbfull()->TEST_WALBufferIsEmpty());
ASSERT_TRUE(dbfull()->FlushWAL(false).ok());
ASSERT_TRUE(dbfull()->TEST_WALBufferIsEmpty());
// try the 2nd wal created during SwitchWAL
dbfull()->TEST_SwitchWAL();
ASSERT_TRUE(Put("key" + ToString(0), "value").ok());
ASSERT_TRUE(options.manual_wal_flush != dbfull()->TEST_WALBufferIsEmpty());
ASSERT_TRUE(dbfull()->FlushWAL(false).ok());
ASSERT_TRUE(dbfull()->TEST_WALBufferIsEmpty());
}
TEST_P(DBWriteTest, IOErrorOnWALWriteTriggersReadOnlyMode) {
std::unique_ptr<FaultInjectionTestEnv> mock_env(
new FaultInjectionTestEnv(Env::Default()));
Options options = GetOptions();
options.env = mock_env.get();
Reopen(options);
for (int i = 0; i < 2; i++) {
// Forcibly fail WAL write for the first Put only. Subsequent Puts should
// fail due to read-only mode
mock_env->SetFilesystemActive(i != 0);
auto res = Put("key" + ToString(i), "value");
// TSAN reports a false alarm for lock-order-inversion but Open and
// FlushWAL are not run concurrently. Disabling this until TSAN is
// fixed.
/*
if (options.manual_wal_flush && i == 0) {
// even with manual_wal_flush the 2nd Put should return error because of
// the read-only mode
ASSERT_TRUE(res.ok());
// we should see fs error when we do the flush
res = dbfull()->FlushWAL(false);
}
*/
if (!options.manual_wal_flush) {
ASSERT_FALSE(res.ok());
}
}
// Close before mock_env destruct.
Close();
}
TEST_P(DBWriteTest, IOErrorOnSwitchMemtable) {
Random rnd(301);
std::unique_ptr<FaultInjectionTestEnv> mock_env(
new FaultInjectionTestEnv(Env::Default()));
Options options = GetOptions();
options.env = mock_env.get();
options.writable_file_max_buffer_size = 4 * 1024 * 1024;
options.write_buffer_size = 3 * 512 * 1024;
options.wal_bytes_per_sync = 256 * 1024;
options.manual_wal_flush = true;
Reopen(options);
mock_env->SetFilesystemActive(false, Status::IOError("Not active"));
Status s;
for (int i = 0; i < 4 * 512; ++i) {
s = Put(Key(i), RandomString(&rnd, 1024));
if (!s.ok()) {
break;
}
}
ASSERT_EQ(s.severity(), Status::Severity::kFatalError);
mock_env->SetFilesystemActive(true);
// Close before mock_env destruct.
Close();
}
// Test that db->LockWAL() flushes the WAL after locking.
TEST_P(DBWriteTest, LockWalInEffect) {
Options options = GetOptions();
Reopen(options);
// try the 1st WAL created during open
ASSERT_OK(Put("key" + ToString(0), "value"));
ASSERT_TRUE(options.manual_wal_flush != dbfull()->TEST_WALBufferIsEmpty());
ASSERT_OK(dbfull()->LockWAL());
ASSERT_TRUE(dbfull()->TEST_WALBufferIsEmpty(false));
ASSERT_OK(dbfull()->UnlockWAL());
// try the 2nd wal created during SwitchWAL
dbfull()->TEST_SwitchWAL();
ASSERT_OK(Put("key" + ToString(0), "value"));
ASSERT_TRUE(options.manual_wal_flush != dbfull()->TEST_WALBufferIsEmpty());
ASSERT_OK(dbfull()->LockWAL());
ASSERT_TRUE(dbfull()->TEST_WALBufferIsEmpty(false));
ASSERT_OK(dbfull()->UnlockWAL());
}
INSTANTIATE_TEST_CASE_P(DBWriteTestInstance, DBWriteTest,
testing::Values(DBTestBase::kDefault,
DBTestBase::kConcurrentWALWrites,
DBTestBase::kPipelinedWrite));
} // namespace rocksdb
int main(int argc, char** argv) {
rocksdb::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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