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rocksdb/db/db_io_failure_test.cc

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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).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include "db/db_test_util.h"
#include "port/stack_trace.h"
#include "test_util/testutil.h"
#include "util/random.h"
namespace ROCKSDB_NAMESPACE {
namespace {
// A wrapper that allows injection of errors.
class CorruptionFS : public FileSystemWrapper {
public:
bool writable_file_error_;
int num_writable_file_errors_;
explicit CorruptionFS(const std::shared_ptr<FileSystem>& _target,
bool fs_buffer, bool verify_read)
: FileSystemWrapper(_target),
writable_file_error_(false),
num_writable_file_errors_(0),
corruption_trigger_(INT_MAX),
read_count_(0),
corrupt_offset_(0),
corrupt_len_(0),
rnd_(300),
fs_buffer_(fs_buffer),
verify_read_(verify_read) {}
~CorruptionFS() override {
// Assert that the corruption was reset, which means it got triggered
assert(corruption_trigger_ == INT_MAX || corrupt_len_ > 0);
}
const char* Name() const override { return "ErrorEnv"; }
IOStatus NewWritableFile(const std::string& fname, const FileOptions& opts,
std::unique_ptr<FSWritableFile>* result,
IODebugContext* dbg) override {
result->reset();
if (writable_file_error_) {
++num_writable_file_errors_;
return IOStatus::IOError(fname, "fake error");
}
return target()->NewWritableFile(fname, opts, result, dbg);
}
void SetCorruptionTrigger(const int trigger) {
MutexLock l(&mutex_);
corruption_trigger_ = trigger;
read_count_ = 0;
corrupt_fname_.clear();
}
IOStatus NewRandomAccessFile(const std::string& fname,
const FileOptions& opts,
std::unique_ptr<FSRandomAccessFile>* result,
IODebugContext* dbg) override {
class CorruptionRandomAccessFile : public FSRandomAccessFileOwnerWrapper {
public:
CorruptionRandomAccessFile(CorruptionFS& fs, const std::string& fname,
std::unique_ptr<FSRandomAccessFile>& file)
: FSRandomAccessFileOwnerWrapper(std::move(file)),
fs_(fs),
fname_(fname) {}
IOStatus Read(uint64_t offset, size_t len, const IOOptions& opts,
Slice* result, char* scratch,
IODebugContext* dbg) const override {
IOStatus s = target()->Read(offset, len, opts, result, scratch, dbg);
if (opts.verify_and_reconstruct_read) {
fs_.MaybeResetOverlapWithCorruptedChunk(fname_, offset,
result->size());
return s;
}
MutexLock l(&fs_.mutex_);
if (s.ok() && ++fs_.read_count_ >= fs_.corruption_trigger_) {
fs_.corruption_trigger_ = INT_MAX;
char* data = const_cast<char*>(result->data());
std::memcpy(
data,
fs_.rnd_.RandomString(static_cast<int>(result->size())).c_str(),
result->size());
fs_.SetCorruptedChunk(fname_, offset, result->size());
}
return s;
}
IOStatus MultiRead(FSReadRequest* reqs, size_t num_reqs,
const IOOptions& options,
IODebugContext* dbg) override {
for (size_t i = 0; i < num_reqs; ++i) {
FSReadRequest& req = reqs[i];
if (fs_.fs_buffer_) {
FSAllocationPtr buffer(new char[req.len], [](void* ptr) {
delete[] static_cast<char*>(ptr);
});
req.fs_scratch = std::move(buffer);
req.status = Read(req.offset, req.len, options, &req.result,
static_cast<char*>(req.fs_scratch.get()), dbg);
} else {
req.status = Read(req.offset, req.len, options, &req.result,
req.scratch, dbg);
}
}
return IOStatus::OK();
}
IOStatus Prefetch(uint64_t /*offset*/, size_t /*n*/,
const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return IOStatus::NotSupported("Prefetch");
}
private:
CorruptionFS& fs_;
std::string fname_;
};
std::unique_ptr<FSRandomAccessFile> file;
IOStatus s = target()->NewRandomAccessFile(fname, opts, &file, dbg);
EXPECT_OK(s);
result->reset(new CorruptionRandomAccessFile(*this, fname, file));
return s;
}
IOStatus NewSequentialFile(const std::string& fname,
const FileOptions& file_opts,
std::unique_ptr<FSSequentialFile>* result,
IODebugContext* dbg) override {
class CorruptionSequentialFile : public FSSequentialFileOwnerWrapper {
public:
CorruptionSequentialFile(CorruptionFS& fs, const std::string& fname,
std::unique_ptr<FSSequentialFile>& file)
: FSSequentialFileOwnerWrapper(std::move(file)),
fs_(fs),
fname_(fname),
offset_(0) {}
IOStatus Read(size_t len, const IOOptions& opts, Slice* result,
char* scratch, IODebugContext* dbg) override {
IOStatus s = target()->Read(len, opts, result, scratch, dbg);
if (result->size() == 0 ||
fname_.find("IDENTITY") != std::string::npos) {
return s;
}
if (opts.verify_and_reconstruct_read) {
fs_.MaybeResetOverlapWithCorruptedChunk(fname_, offset_,
result->size());
return s;
}
MutexLock l(&fs_.mutex_);
if (s.ok() && ++fs_.read_count_ >= fs_.corruption_trigger_) {
fs_.corruption_trigger_ = INT_MAX;
char* data = const_cast<char*>(result->data());
std::memcpy(
data,
fs_.rnd_.RandomString(static_cast<int>(result->size())).c_str(),
result->size());
fs_.SetCorruptedChunk(fname_, offset_, result->size());
}
offset_ += result->size();
return s;
}
private:
CorruptionFS& fs_;
std::string fname_;
size_t offset_;
};
std::unique_ptr<FSSequentialFile> file;
IOStatus s = target()->NewSequentialFile(fname, file_opts, &file, dbg);
EXPECT_OK(s);
result->reset(new CorruptionSequentialFile(*this, fname, file));
return s;
}
void SupportedOps(int64_t& supported_ops) override {
supported_ops = 1 << FSSupportedOps::kAsyncIO;
if (fs_buffer_) {
supported_ops |= 1 << FSSupportedOps::kFSBuffer;
}
if (verify_read_) {
supported_ops |= 1 << FSSupportedOps::kVerifyAndReconstructRead;
}
}
void SetCorruptedChunk(const std::string& fname, size_t offset, size_t len) {
assert(corrupt_fname_.empty());
corrupt_fname_ = fname;
corrupt_offset_ = offset;
corrupt_len_ = len;
}
void MaybeResetOverlapWithCorruptedChunk(const std::string& fname,
size_t offset, size_t len) {
if (fname == corrupt_fname_ &&
((offset <= corrupt_offset_ && (offset + len) > corrupt_offset_) ||
(offset >= corrupt_offset_ &&
offset < (corrupt_offset_ + corrupt_len_)))) {
corrupt_fname_.clear();
}
}
bool VerifyRetry() { return corrupt_len_ > 0 && corrupt_fname_.empty(); }
int read_count() { return read_count_; }
int corruption_trigger() { return corruption_trigger_; }
private:
int corruption_trigger_;
int read_count_;
std::string corrupt_fname_;
size_t corrupt_offset_;
size_t corrupt_len_;
Random rnd_;
bool fs_buffer_;
bool verify_read_;
port::Mutex mutex_;
};
} // anonymous namespace
class DBIOFailureTest : public DBTestBase {
public:
DBIOFailureTest() : DBTestBase("db_io_failure_test", /*env_do_fsync=*/true) {}
};
// Check that number of files does not grow when writes are dropped
TEST_F(DBIOFailureTest, DropWrites) {
do {
Options options = CurrentOptions();
options.env = env_;
options.paranoid_checks = false;
Reopen(options);
ASSERT_OK(Put("foo", "v1"));
ASSERT_EQ("v1", Get("foo"));
Compact("a", "z");
const size_t num_files = CountFiles();
// Force out-of-space errors
env_->drop_writes_.store(true, std::memory_order_release);
env_->sleep_counter_.Reset();
env_->SetMockSleep();
for (int i = 0; i < 5; i++) {
if (option_config_ != kUniversalCompactionMultiLevel &&
option_config_ != kUniversalSubcompactions) {
for (int level = 0; level < dbfull()->NumberLevels(); level++) {
if (level > 0 && level == dbfull()->NumberLevels() - 1) {
break;
}
Status s =
dbfull()->TEST_CompactRange(level, nullptr, nullptr, nullptr,
true /* disallow trivial move */);
ASSERT_TRUE(s.ok() || s.IsCorruption());
}
} else {
Status s =
dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
ASSERT_TRUE(s.ok() || s.IsCorruption());
}
}
std::string property_value;
ASSERT_TRUE(db_->GetProperty("rocksdb.background-errors", &property_value));
ASSERT_EQ("5", property_value);
env_->drop_writes_.store(false, std::memory_order_release);
const size_t count = CountFiles();
ASSERT_LT(count, num_files + 3);
// Check that compaction attempts slept after errors
// TODO @krad: Figure out why ASSERT_EQ 5 keeps failing in certain compiler
// versions
ASSERT_GE(env_->sleep_counter_.Read(), 4);
} while (ChangeCompactOptions());
}
// Check background error counter bumped on flush failures.
TEST_F(DBIOFailureTest, DropWritesFlush) {
do {
Options options = CurrentOptions();
options.env = env_;
options.max_background_flushes = 1;
Reopen(options);
ASSERT_OK(Put("foo", "v1"));
// Force out-of-space errors
env_->drop_writes_.store(true, std::memory_order_release);
std::string property_value;
// Background error count is 0 now.
ASSERT_TRUE(db_->GetProperty("rocksdb.background-errors", &property_value));
ASSERT_EQ("0", property_value);
// ASSERT file is too short
ASSERT_TRUE(dbfull()->TEST_FlushMemTable(true).IsCorruption());
ASSERT_TRUE(db_->GetProperty("rocksdb.background-errors", &property_value));
ASSERT_EQ("1", property_value);
env_->drop_writes_.store(false, std::memory_order_release);
} while (ChangeCompactOptions());
}
// Check that CompactRange() returns failure if there is not enough space left
// on device
TEST_F(DBIOFailureTest, NoSpaceCompactRange) {
do {
Options options = CurrentOptions();
options.env = env_;
options.disable_auto_compactions = true;
Reopen(options);
// generate 5 tables
for (int i = 0; i < 5; ++i) {
ASSERT_OK(Put(Key(i), Key(i) + "v"));
ASSERT_OK(Flush());
}
// Force out-of-space errors
env_->no_space_.store(true, std::memory_order_release);
Status s = dbfull()->TEST_CompactRange(0, nullptr, nullptr, nullptr,
true /* disallow trivial move */);
ASSERT_TRUE(s.IsIOError());
ASSERT_TRUE(s.IsNoSpace());
env_->no_space_.store(false, std::memory_order_release);
} while (ChangeCompactOptions());
}
TEST_F(DBIOFailureTest, NonWritableFileSystem) {
do {
Options options = CurrentOptions();
options.write_buffer_size = 4096;
options.arena_block_size = 4096;
options.env = env_;
Reopen(options);
ASSERT_OK(Put("foo", "v1"));
env_->non_writeable_rate_.store(100);
std::string big(100000, 'x');
int errors = 0;
for (int i = 0; i < 20; i++) {
if (!Put("foo", big).ok()) {
errors++;
env_->SleepForMicroseconds(100000);
}
}
ASSERT_GT(errors, 0);
env_->non_writeable_rate_.store(0);
} while (ChangeCompactOptions());
}
TEST_F(DBIOFailureTest, ManifestWriteError) {
// Test for the following problem:
// (a) Compaction produces file F
// (b) Log record containing F is written to MANIFEST file, but Sync() fails
// (c) GC deletes F
// (d) After reopening DB, reads fail since deleted F is named in log record
// We iterate twice. In the second iteration, everything is the
// same except the log record never makes it to the MANIFEST file.
for (int iter = 0; iter < 2; iter++) {
std::atomic<bool>* error_type = (iter == 0) ? &env_->manifest_sync_error_
: &env_->manifest_write_error_;
// Insert foo=>bar mapping
Options options = CurrentOptions();
options.env = env_;
options.create_if_missing = true;
options.error_if_exists = false;
options.paranoid_checks = true;
DestroyAndReopen(options);
ASSERT_OK(Put("foo", "bar"));
ASSERT_EQ("bar", Get("foo"));
// Memtable compaction (will succeed)
ASSERT_OK(Flush());
ASSERT_EQ("bar", Get("foo"));
const int last = 2;
MoveFilesToLevel(2);
ASSERT_EQ(NumTableFilesAtLevel(last), 1); // foo=>bar is now in last level
// Merging compaction (will fail)
error_type->store(true, std::memory_order_release);
ASSERT_NOK(
dbfull()->TEST_CompactRange(last, nullptr, nullptr)); // Should fail
ASSERT_EQ("bar", Get("foo"));
error_type->store(false, std::memory_order_release);
// Since paranoid_checks=true, writes should fail
ASSERT_NOK(Put("foo2", "bar2"));
// Recovery: should not lose data
ASSERT_EQ("bar", Get("foo"));
// Try again with paranoid_checks=false
Close();
options.paranoid_checks = false;
Reopen(options);
// Merging compaction (will fail)
error_type->store(true, std::memory_order_release);
Status s =
dbfull()->TEST_CompactRange(last, nullptr, nullptr); // Should fail
if (iter == 0) {
ASSERT_OK(s);
} else {
ASSERT_TRUE(s.IsIOError());
}
ASSERT_EQ("bar", Get("foo"));
// Recovery: should not lose data
error_type->store(false, std::memory_order_release);
Reopen(options);
ASSERT_EQ("bar", Get("foo"));
// Since paranoid_checks=false, writes should succeed
ASSERT_OK(Put("foo2", "bar2"));
ASSERT_EQ("bar", Get("foo"));
ASSERT_EQ("bar2", Get("foo2"));
}
}
TEST_F(DBIOFailureTest, PutFailsParanoid) {
// Test the following:
// (a) A random put fails in paranoid mode (simulate by sync fail)
// (b) All other puts have to fail, even if writes would succeed
// (c) All of that should happen ONLY if paranoid_checks = true
Options options = CurrentOptions();
options.env = env_;
options.create_if_missing = true;
options.error_if_exists = false;
options.paranoid_checks = true;
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_OK(Put(1, "foo", "bar"));
ASSERT_OK(Put(1, "foo1", "bar1"));
// simulate error
env_->log_write_error_.store(true, std::memory_order_release);
ASSERT_NOK(Put(1, "foo2", "bar2"));
env_->log_write_error_.store(false, std::memory_order_release);
// the next put should fail, too
ASSERT_NOK(Put(1, "foo3", "bar3"));
// but we're still able to read
ASSERT_EQ("bar", Get(1, "foo"));
// do the same thing with paranoid checks off
options.paranoid_checks = false;
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_OK(Put(1, "foo", "bar"));
ASSERT_OK(Put(1, "foo1", "bar1"));
// simulate error
env_->log_write_error_.store(true, std::memory_order_release);
ASSERT_NOK(Put(1, "foo2", "bar2"));
env_->log_write_error_.store(false, std::memory_order_release);
// the next put should NOT fail
ASSERT_OK(Put(1, "foo3", "bar3"));
}
#if !(defined NDEBUG) || !defined(OS_WIN)
TEST_F(DBIOFailureTest, FlushSstRangeSyncError) {
Options options = CurrentOptions();
options.env = env_;
options.create_if_missing = true;
options.error_if_exists = false;
options.paranoid_checks = true;
options.write_buffer_size = 256 * 1024 * 1024;
options.writable_file_max_buffer_size = 128 * 1024;
options.bytes_per_sync = 128 * 1024;
options.level0_file_num_compaction_trigger = 4;
options.memtable_factory.reset(test::NewSpecialSkipListFactory(10));
BlockBasedTableOptions table_options;
table_options.filter_policy.reset(NewBloomFilterPolicy(10));
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
const char* io_error_msg = "range sync dummy error";
std::atomic<int> range_sync_called(0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"SpecialEnv::SStableFile::RangeSync", [&](void* arg) {
if (range_sync_called.fetch_add(1) == 0) {
Status* st = static_cast<Status*>(arg);
*st = Status::IOError(io_error_msg);
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Random rnd(301);
std::string rnd_str =
rnd.RandomString(static_cast<int>(options.bytes_per_sync / 2));
std::string rnd_str_512kb = rnd.RandomString(512 * 1024);
ASSERT_OK(Put(1, "foo", "bar"));
// First 1MB doesn't get range synced
ASSERT_OK(Put(1, "foo0_0", rnd_str_512kb));
ASSERT_OK(Put(1, "foo0_1", rnd_str_512kb));
ASSERT_OK(Put(1, "foo1_1", rnd_str));
ASSERT_OK(Put(1, "foo1_2", rnd_str));
ASSERT_OK(Put(1, "foo1_3", rnd_str));
ASSERT_OK(Put(1, "foo2", "bar"));
ASSERT_OK(Put(1, "foo3_1", rnd_str));
ASSERT_OK(Put(1, "foo3_2", rnd_str));
ASSERT_OK(Put(1, "foo3_3", rnd_str));
ASSERT_OK(Put(1, "foo4", "bar"));
Status s = dbfull()->TEST_WaitForFlushMemTable(handles_[1]);
ASSERT_TRUE(s.IsIOError());
ASSERT_STREQ(s.getState(), io_error_msg);
// Following writes should fail as flush failed.
ASSERT_NOK(Put(1, "foo2", "bar3"));
ASSERT_EQ("bar", Get(1, "foo"));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
ASSERT_GE(1, range_sync_called.load());
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_EQ("bar", Get(1, "foo"));
}
TEST_F(DBIOFailureTest, CompactSstRangeSyncError) {
Options options = CurrentOptions();
options.env = env_;
options.create_if_missing = true;
options.error_if_exists = false;
options.paranoid_checks = true;
options.write_buffer_size = 256 * 1024 * 1024;
options.writable_file_max_buffer_size = 128 * 1024;
options.bytes_per_sync = 128 * 1024;
options.level0_file_num_compaction_trigger = 2;
options.target_file_size_base = 256 * 1024 * 1024;
options.disable_auto_compactions = true;
BlockBasedTableOptions table_options;
table_options.filter_policy.reset(NewBloomFilterPolicy(10));
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
Random rnd(301);
std::string rnd_str =
rnd.RandomString(static_cast<int>(options.bytes_per_sync / 2));
std::string rnd_str_512kb = rnd.RandomString(512 * 1024);
ASSERT_OK(Put(1, "foo", "bar"));
// First 1MB doesn't get range synced
ASSERT_OK(Put(1, "foo0_0", rnd_str_512kb));
ASSERT_OK(Put(1, "foo0_1", rnd_str_512kb));
ASSERT_OK(Put(1, "foo1_1", rnd_str));
ASSERT_OK(Put(1, "foo1_2", rnd_str));
ASSERT_OK(Put(1, "foo1_3", rnd_str));
ASSERT_OK(Flush(1));
ASSERT_OK(Put(1, "foo", "bar"));
ASSERT_OK(Put(1, "foo3_1", rnd_str));
ASSERT_OK(Put(1, "foo3_2", rnd_str));
ASSERT_OK(Put(1, "foo3_3", rnd_str));
ASSERT_OK(Put(1, "foo4", "bar"));
ASSERT_OK(Flush(1));
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable(handles_[1]));
const char* io_error_msg = "range sync dummy error";
std::atomic<int> range_sync_called(0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"SpecialEnv::SStableFile::RangeSync", [&](void* arg) {
if (range_sync_called.fetch_add(1) == 0) {
Status* st = static_cast<Status*>(arg);
*st = Status::IOError(io_error_msg);
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
ASSERT_OK(dbfull()->SetOptions(handles_[1],
{
{"disable_auto_compactions", "false"},
}));
Status s = dbfull()->TEST_WaitForCompact();
ASSERT_TRUE(s.IsIOError());
ASSERT_STREQ(s.getState(), io_error_msg);
// Following writes should fail as flush failed.
ASSERT_NOK(Put(1, "foo2", "bar3"));
ASSERT_EQ("bar", Get(1, "foo"));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
ASSERT_GE(1, range_sync_called.load());
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_EQ("bar", Get(1, "foo"));
}
TEST_F(DBIOFailureTest, FlushSstCloseError) {
Options options = CurrentOptions();
options.env = env_;
options.create_if_missing = true;
options.error_if_exists = false;
options.paranoid_checks = true;
options.level0_file_num_compaction_trigger = 4;
options.memtable_factory.reset(test::NewSpecialSkipListFactory(2));
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
const char* io_error_msg = "close dummy error";
std::atomic<int> close_called(0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"SpecialEnv::SStableFile::Close", [&](void* arg) {
if (close_called.fetch_add(1) == 0) {
Status* st = static_cast<Status*>(arg);
*st = Status::IOError(io_error_msg);
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
ASSERT_OK(Put(1, "foo", "bar"));
ASSERT_OK(Put(1, "foo1", "bar1"));
ASSERT_OK(Put(1, "foo", "bar2"));
Status s = dbfull()->TEST_WaitForFlushMemTable(handles_[1]);
ASSERT_TRUE(s.IsIOError());
ASSERT_STREQ(s.getState(), io_error_msg);
// Following writes should fail as flush failed.
ASSERT_NOK(Put(1, "foo2", "bar3"));
ASSERT_EQ("bar2", Get(1, "foo"));
ASSERT_EQ("bar1", Get(1, "foo1"));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_EQ("bar2", Get(1, "foo"));
ASSERT_EQ("bar1", Get(1, "foo1"));
}
TEST_F(DBIOFailureTest, CompactionSstCloseError) {
Options options = CurrentOptions();
options.env = env_;
options.create_if_missing = true;
options.error_if_exists = false;
options.paranoid_checks = true;
options.level0_file_num_compaction_trigger = 2;
options.disable_auto_compactions = true;
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_OK(Put(1, "foo", "bar"));
ASSERT_OK(Put(1, "foo2", "bar"));
ASSERT_OK(Flush(1));
ASSERT_OK(Put(1, "foo", "bar2"));
ASSERT_OK(Put(1, "foo2", "bar"));
ASSERT_OK(Flush(1));
ASSERT_OK(Put(1, "foo", "bar3"));
ASSERT_OK(Put(1, "foo2", "bar"));
ASSERT_OK(Flush(1));
ASSERT_OK(dbfull()->TEST_WaitForCompact());
const char* io_error_msg = "close dummy error";
std::atomic<int> close_called(0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"SpecialEnv::SStableFile::Close", [&](void* arg) {
if (close_called.fetch_add(1) == 0) {
Status* st = static_cast<Status*>(arg);
*st = Status::IOError(io_error_msg);
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
ASSERT_OK(dbfull()->SetOptions(handles_[1],
{
{"disable_auto_compactions", "false"},
}));
Status s = dbfull()->TEST_WaitForCompact();
ASSERT_TRUE(s.IsIOError());
ASSERT_STREQ(s.getState(), io_error_msg);
// Following writes should fail as compaction failed.
ASSERT_NOK(Put(1, "foo2", "bar3"));
ASSERT_EQ("bar3", Get(1, "foo"));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_EQ("bar3", Get(1, "foo"));
}
TEST_F(DBIOFailureTest, FlushSstSyncError) {
Options options = CurrentOptions();
options.env = env_;
options.create_if_missing = true;
options.error_if_exists = false;
options.paranoid_checks = true;
options.use_fsync = false;
options.level0_file_num_compaction_trigger = 4;
options.memtable_factory.reset(test::NewSpecialSkipListFactory(2));
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
const char* io_error_msg = "sync dummy error";
std::atomic<int> sync_called(0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"SpecialEnv::SStableFile::Sync", [&](void* arg) {
if (sync_called.fetch_add(1) == 0) {
Status* st = static_cast<Status*>(arg);
*st = Status::IOError(io_error_msg);
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
ASSERT_OK(Put(1, "foo", "bar"));
ASSERT_OK(Put(1, "foo1", "bar1"));
ASSERT_OK(Put(1, "foo", "bar2"));
Status s = dbfull()->TEST_WaitForFlushMemTable(handles_[1]);
ASSERT_TRUE(s.IsIOError());
ASSERT_STREQ(s.getState(), io_error_msg);
// Following writes should fail as flush failed.
ASSERT_NOK(Put(1, "foo2", "bar3"));
ASSERT_EQ("bar2", Get(1, "foo"));
ASSERT_EQ("bar1", Get(1, "foo1"));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_EQ("bar2", Get(1, "foo"));
ASSERT_EQ("bar1", Get(1, "foo1"));
}
TEST_F(DBIOFailureTest, CompactionSstSyncError) {
Options options = CurrentOptions();
options.env = env_;
options.create_if_missing = true;
options.error_if_exists = false;
options.paranoid_checks = true;
options.level0_file_num_compaction_trigger = 2;
options.disable_auto_compactions = true;
options.use_fsync = false;
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
ASSERT_OK(Put(1, "foo", "bar"));
ASSERT_OK(Put(1, "foo2", "bar"));
ASSERT_OK(Flush(1));
ASSERT_OK(Put(1, "foo", "bar2"));
ASSERT_OK(Put(1, "foo2", "bar"));
ASSERT_OK(Flush(1));
ASSERT_OK(Put(1, "foo", "bar3"));
ASSERT_OK(Put(1, "foo2", "bar"));
ASSERT_OK(Flush(1));
ASSERT_OK(dbfull()->TEST_WaitForCompact());
const char* io_error_msg = "sync dummy error";
std::atomic<int> sync_called(0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"SpecialEnv::SStableFile::Sync", [&](void* arg) {
if (sync_called.fetch_add(1) == 0) {
Status* st = static_cast<Status*>(arg);
*st = Status::IOError(io_error_msg);
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
ASSERT_OK(dbfull()->SetOptions(handles_[1],
{
{"disable_auto_compactions", "false"},
}));
Status s = dbfull()->TEST_WaitForCompact();
ASSERT_TRUE(s.IsIOError());
ASSERT_STREQ(s.getState(), io_error_msg);
// Following writes should fail as compaction failed.
ASSERT_NOK(Put(1, "foo2", "bar3"));
ASSERT_EQ("bar3", Get(1, "foo"));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_EQ("bar3", Get(1, "foo"));
}
#endif // !(defined NDEBUG) || !defined(OS_WIN)
class DBIOCorruptionTest
: public DBIOFailureTest,
public testing::WithParamInterface<std::tuple<bool, bool, bool>> {
public:
DBIOCorruptionTest() : DBIOFailureTest() {
BlockBasedTableOptions bbto;
options_ = CurrentOptions();
options_.statistics = CreateDBStatistics();
base_env_ = env_;
EXPECT_NE(base_env_, nullptr);
fs_.reset(new CorruptionFS(base_env_->GetFileSystem(),
std::get<0>(GetParam()),
std::get<2>(GetParam())));
env_guard_ = NewCompositeEnv(fs_);
options_.env = env_guard_.get();
bbto.num_file_reads_for_auto_readahead = 0;
options_.table_factory.reset(NewBlockBasedTableFactory(bbto));
options_.disable_auto_compactions = true;
options_.max_file_opening_threads = 0;
Reopen(options_);
}
~DBIOCorruptionTest() {
Close();
db_ = nullptr;
}
Status ReopenDB() { return TryReopen(options_); }
Statistics* stats() { return options_.statistics.get(); }
protected:
std::unique_ptr<Env> env_guard_;
std::shared_ptr<CorruptionFS> fs_;
Env* base_env_;
Options options_;
};
TEST_P(DBIOCorruptionTest, GetReadCorruptionRetry) {
CorruptionFS* fs =
static_cast<CorruptionFS*>(env_guard_->GetFileSystem().get());
ASSERT_OK(Put("key1", "val1"));
ASSERT_OK(Flush());
fs->SetCorruptionTrigger(1);
std::string val;
ReadOptions ro;
ro.async_io = std::get<1>(GetParam());
Status s = dbfull()->Get(ReadOptions(), "key1", &val);
if (std::get<2>(GetParam())) {
ASSERT_OK(s);
ASSERT_EQ(val, "val1");
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 1);
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_SUCCESS_COUNT),
1);
} else {
ASSERT_TRUE(s.IsCorruption());
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 0);
}
}
TEST_P(DBIOCorruptionTest, IterReadCorruptionRetry) {
CorruptionFS* fs =
static_cast<CorruptionFS*>(env_guard_->GetFileSystem().get());
ASSERT_OK(Put("key1", "val1"));
ASSERT_OK(Flush());
fs->SetCorruptionTrigger(1);
ReadOptions ro;
ro.readahead_size = 65536;
ro.async_io = std::get<1>(GetParam());
Iterator* iter = dbfull()->NewIterator(ro);
iter->SeekToFirst();
while (iter->status().ok() && iter->Valid()) {
iter->Next();
}
if (std::get<2>(GetParam())) {
ASSERT_OK(iter->status());
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 1);
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_SUCCESS_COUNT),
1);
} else {
ASSERT_TRUE(iter->status().IsCorruption());
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 0);
}
delete iter;
}
TEST_P(DBIOCorruptionTest, MultiGetReadCorruptionRetry) {
CorruptionFS* fs =
static_cast<CorruptionFS*>(env_guard_->GetFileSystem().get());
ASSERT_OK(Put("key1", "val1"));
ASSERT_OK(Put("key2", "val2"));
ASSERT_OK(Flush());
fs->SetCorruptionTrigger(1);
std::vector<std::string> keystr{"key1", "key2"};
std::vector<Slice> keys{Slice(keystr[0]), Slice(keystr[1])};
std::vector<PinnableSlice> values(keys.size());
std::vector<Status> statuses(keys.size());
ReadOptions ro;
ro.async_io = std::get<1>(GetParam());
dbfull()->MultiGet(ro, dbfull()->DefaultColumnFamily(), keys.size(),
keys.data(), values.data(), statuses.data());
if (std::get<2>(GetParam())) {
ASSERT_EQ(values[0].ToString(), "val1");
ASSERT_EQ(values[1].ToString(), "val2");
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 1);
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_SUCCESS_COUNT),
1);
} else {
ASSERT_TRUE(statuses[0].IsCorruption());
ASSERT_TRUE(statuses[1].IsCorruption());
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 0);
}
}
TEST_P(DBIOCorruptionTest, CompactionReadCorruptionRetry) {
CorruptionFS* fs =
static_cast<CorruptionFS*>(env_guard_->GetFileSystem().get());
ASSERT_OK(Put("key1", "val1"));
ASSERT_OK(Put("key3", "val3"));
ASSERT_OK(Flush());
ASSERT_OK(Put("key2", "val2"));
ASSERT_OK(Flush());
fs->SetCorruptionTrigger(1);
Status s = dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
if (std::get<2>(GetParam())) {
ASSERT_OK(s);
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 1);
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_SUCCESS_COUNT),
1);
std::string val;
ReadOptions ro;
ro.async_io = std::get<1>(GetParam());
ASSERT_OK(dbfull()->Get(ro, "key1", &val));
ASSERT_EQ(val, "val1");
} else {
ASSERT_TRUE(s.IsCorruption());
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 0);
}
}
TEST_P(DBIOCorruptionTest, FlushReadCorruptionRetry) {
CorruptionFS* fs =
static_cast<CorruptionFS*>(env_guard_->GetFileSystem().get());
ASSERT_OK(Put("key1", "val1"));
fs->SetCorruptionTrigger(1);
Status s = Flush();
if (std::get<2>(GetParam())) {
ASSERT_OK(s);
ASSERT_GT(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 1);
ASSERT_GT(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_SUCCESS_COUNT),
1);
std::string val;
ReadOptions ro;
ro.async_io = std::get<1>(GetParam());
ASSERT_OK(dbfull()->Get(ro, "key1", &val));
ASSERT_EQ(val, "val1");
} else {
ASSERT_NOK(s);
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 0);
}
}
TEST_P(DBIOCorruptionTest, ManifestCorruptionRetry) {
CorruptionFS* fs =
static_cast<CorruptionFS*>(env_guard_->GetFileSystem().get());
ASSERT_OK(Put("key1", "val1"));
ASSERT_OK(Flush());
SyncPoint::GetInstance()->SetCallBack(
"VersionSet::Recover:StartManifestRead",
[&](void* /*arg*/) { fs->SetCorruptionTrigger(0); });
SyncPoint::GetInstance()->EnableProcessing();
if (std::get<2>(GetParam())) {
ASSERT_OK(ReopenDB());
ASSERT_GT(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 1);
ASSERT_GT(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_SUCCESS_COUNT),
1);
} else {
ASSERT_EQ(ReopenDB(), Status::Corruption());
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 0);
}
SyncPoint::GetInstance()->DisableProcessing();
}
TEST_P(DBIOCorruptionTest, FooterReadCorruptionRetry) {
Random rnd(300);
bool retry = false;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"ReadFooterFromFileInternal:0", [&](void* arg) {
Slice* data = static_cast<Slice*>(arg);
if (!retry) {
std::memcpy(const_cast<char*>(data->data()),
rnd.RandomString(static_cast<int>(data->size())).c_str(),
data->size());
retry = true;
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
ASSERT_OK(Put("key1", "val1"));
Status s = Flush();
if (std::get<2>(GetParam())) {
ASSERT_OK(s);
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 1);
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_SUCCESS_COUNT),
1);
std::string val;
ReadOptions ro;
ro.async_io = std::get<1>(GetParam());
ASSERT_OK(dbfull()->Get(ro, "key1", &val));
ASSERT_EQ(val, "val1");
} else {
ASSERT_NOK(s);
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 0);
ASSERT_GT(stats()->getTickerCount(SST_FOOTER_CORRUPTION_COUNT), 0);
}
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearAllCallBacks();
}
TEST_P(DBIOCorruptionTest, TablePropertiesCorruptionRetry) {
Random rnd(300);
bool retry = false;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"ReadTablePropertiesHelper:0", [&](void* arg) {
Slice* data = static_cast<Slice*>(arg);
if (!retry) {
std::memcpy(const_cast<char*>(data->data()),
rnd.RandomString(static_cast<int>(data->size())).c_str(),
data->size());
retry = true;
}
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
ASSERT_OK(Put("key1", "val1"));
Status s = Flush();
if (std::get<2>(GetParam())) {
ASSERT_OK(s);
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 1);
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_SUCCESS_COUNT),
1);
std::string val;
ReadOptions ro;
ro.async_io = std::get<1>(GetParam());
ASSERT_OK(dbfull()->Get(ro, "key1", &val));
ASSERT_EQ(val, "val1");
} else {
ASSERT_NOK(s);
ASSERT_EQ(stats()->getTickerCount(FILE_READ_CORRUPTION_RETRY_COUNT), 0);
}
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearAllCallBacks();
}
TEST_P(DBIOCorruptionTest, DBOpenReadCorruptionRetry) {
if (!std::get<2>(GetParam())) {
return;
}
CorruptionFS* fs =
static_cast<CorruptionFS*>(env_guard_->GetFileSystem().get());
for (int sst = 0; sst < 3; ++sst) {
for (int key = 0; key < 100; ++key) {
std::stringstream ss;
ss << std::setw(3) << 100 * sst + key;
ASSERT_OK(Put("key" + ss.str(), "val" + ss.str()));
}
ASSERT_OK(Flush());
}
Close();
// DB open will create table readers unless we reduce the table cache
// capacity.
// SanitizeOptions will set max_open_files to minimum of 20. Table cache
// is allocated with max_open_files - 10 as capacity. So override
// max_open_files to 11 so table cache capacity will become 1. This will
// prevent file open during DB open and force the file to be opened
// during MultiGet
SyncPoint::GetInstance()->SetCallBack(
"SanitizeOptions::AfterChangeMaxOpenFiles", [&](void* arg) {
int* max_open_files = (int*)arg;
*max_open_files = 11;
});
SyncPoint::GetInstance()->EnableProcessing();
// Progressively increase the IO count trigger for corruption, and verify
// that it was retried
int corruption_trigger = 1;
fs->SetCorruptionTrigger(corruption_trigger);
do {
fs->SetCorruptionTrigger(corruption_trigger);
ASSERT_OK(ReopenDB());
for (int sst = 0; sst < 3; ++sst) {
for (int key = 0; key < 100; ++key) {
std::stringstream ss;
ss << std::setw(3) << 100 * sst + key;
ASSERT_EQ(Get("key" + ss.str()), "val" + ss.str());
}
}
// Verify that the injected corruption was repaired
ASSERT_TRUE(fs->VerifyRetry());
corruption_trigger++;
} while (fs->corruption_trigger() == INT_MAX);
}
// The parameters are - 1. Use FS provided buffer, 2. Use async IO ReadOption,
// 3. Retry with verify_and_reconstruct_read IOOption
INSTANTIATE_TEST_CASE_P(DBIOCorruptionTest, DBIOCorruptionTest,
testing::Combine(testing::Bool(), testing::Bool(),
testing::Bool()));
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
RegisterCustomObjects(argc, argv);
return RUN_ALL_TESTS();
}
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