261 lines
8.3 KiB
C++
261 lines
8.3 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "db/db_test_util.h"
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#include "port/stack_trace.h"
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namespace rocksdb {
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class DBIOFailureTest : public DBTestBase {
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public:
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DBIOFailureTest() : DBTestBase("/db_io_failure_test") {}
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};
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#ifndef ROCKSDB_LITE
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// Check that number of files does not grow when writes are dropped
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TEST_F(DBIOFailureTest, DropWrites) {
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do {
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Options options = CurrentOptions();
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options.env = env_;
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options.paranoid_checks = false;
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Reopen(options);
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ASSERT_OK(Put("foo", "v1"));
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ASSERT_EQ("v1", Get("foo"));
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Compact("a", "z");
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const size_t num_files = CountFiles();
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// Force out-of-space errors
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env_->drop_writes_.store(true, std::memory_order_release);
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env_->sleep_counter_.Reset();
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env_->no_sleep_ = true;
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for (int i = 0; i < 5; i++) {
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if (option_config_ != kUniversalCompactionMultiLevel &&
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option_config_ != kUniversalSubcompactions) {
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for (int level = 0; level < dbfull()->NumberLevels(); level++) {
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if (level > 0 && level == dbfull()->NumberLevels() - 1) {
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break;
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}
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dbfull()->TEST_CompactRange(level, nullptr, nullptr, nullptr,
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true /* disallow trivial move */);
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}
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} else {
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dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
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}
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}
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std::string property_value;
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ASSERT_TRUE(db_->GetProperty("rocksdb.background-errors", &property_value));
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ASSERT_EQ("5", property_value);
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env_->drop_writes_.store(false, std::memory_order_release);
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ASSERT_LT(CountFiles(), num_files + 3);
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// Check that compaction attempts slept after errors
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// TODO @krad: Figure out why ASSERT_EQ 5 keeps failing in certain compiler
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// versions
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ASSERT_GE(env_->sleep_counter_.Read(), 4);
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} while (ChangeCompactOptions());
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}
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// Check background error counter bumped on flush failures.
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TEST_F(DBIOFailureTest, DropWritesFlush) {
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do {
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Options options = CurrentOptions();
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options.env = env_;
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options.max_background_flushes = 1;
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Reopen(options);
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ASSERT_OK(Put("foo", "v1"));
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// Force out-of-space errors
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env_->drop_writes_.store(true, std::memory_order_release);
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std::string property_value;
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// Background error count is 0 now.
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ASSERT_TRUE(db_->GetProperty("rocksdb.background-errors", &property_value));
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ASSERT_EQ("0", property_value);
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dbfull()->TEST_FlushMemTable(true);
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ASSERT_TRUE(db_->GetProperty("rocksdb.background-errors", &property_value));
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ASSERT_EQ("1", property_value);
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env_->drop_writes_.store(false, std::memory_order_release);
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} while (ChangeCompactOptions());
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}
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#endif // ROCKSDB_LITE
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// Check that CompactRange() returns failure if there is not enough space left
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// on device
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TEST_F(DBIOFailureTest, NoSpaceCompactRange) {
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do {
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Options options = CurrentOptions();
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options.env = env_;
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options.disable_auto_compactions = true;
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Reopen(options);
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// generate 5 tables
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for (int i = 0; i < 5; ++i) {
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ASSERT_OK(Put(Key(i), Key(i) + "v"));
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ASSERT_OK(Flush());
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}
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// Force out-of-space errors
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env_->no_space_.store(true, std::memory_order_release);
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Status s = dbfull()->TEST_CompactRange(0, nullptr, nullptr, nullptr,
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true /* disallow trivial move */);
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ASSERT_TRUE(s.IsIOError());
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ASSERT_TRUE(s.IsNoSpace());
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env_->no_space_.store(false, std::memory_order_release);
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} while (ChangeCompactOptions());
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}
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TEST_F(DBIOFailureTest, NonWritableFileSystem) {
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do {
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Options options = CurrentOptions();
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options.write_buffer_size = 4096;
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options.arena_block_size = 4096;
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options.env = env_;
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Reopen(options);
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ASSERT_OK(Put("foo", "v1"));
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env_->non_writeable_rate_.store(100);
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std::string big(100000, 'x');
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int errors = 0;
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for (int i = 0; i < 20; i++) {
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if (!Put("foo", big).ok()) {
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errors++;
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env_->SleepForMicroseconds(100000);
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}
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}
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ASSERT_GT(errors, 0);
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env_->non_writeable_rate_.store(0);
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} while (ChangeCompactOptions());
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}
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#ifndef ROCKSDB_LITE
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TEST_F(DBIOFailureTest, ManifestWriteError) {
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// Test for the following problem:
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// (a) Compaction produces file F
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// (b) Log record containing F is written to MANIFEST file, but Sync() fails
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// (c) GC deletes F
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// (d) After reopening DB, reads fail since deleted F is named in log record
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// We iterate twice. In the second iteration, everything is the
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// same except the log record never makes it to the MANIFEST file.
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for (int iter = 0; iter < 2; iter++) {
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std::atomic<bool>* error_type = (iter == 0) ? &env_->manifest_sync_error_
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: &env_->manifest_write_error_;
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// Insert foo=>bar mapping
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Options options = CurrentOptions();
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options.env = env_;
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options.create_if_missing = true;
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options.error_if_exists = false;
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options.paranoid_checks = true;
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DestroyAndReopen(options);
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ASSERT_OK(Put("foo", "bar"));
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ASSERT_EQ("bar", Get("foo"));
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// Memtable compaction (will succeed)
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Flush();
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ASSERT_EQ("bar", Get("foo"));
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const int last = 2;
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MoveFilesToLevel(2);
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ASSERT_EQ(NumTableFilesAtLevel(last), 1); // foo=>bar is now in last level
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// Merging compaction (will fail)
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error_type->store(true, std::memory_order_release);
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dbfull()->TEST_CompactRange(last, nullptr, nullptr); // Should fail
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ASSERT_EQ("bar", Get("foo"));
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error_type->store(false, std::memory_order_release);
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// Since paranoid_checks=true, writes should fail
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ASSERT_NOK(Put("foo2", "bar2"));
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// Recovery: should not lose data
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ASSERT_EQ("bar", Get("foo"));
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// Try again with paranoid_checks=false
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Close();
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options.paranoid_checks = false;
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Reopen(options);
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// Merging compaction (will fail)
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error_type->store(true, std::memory_order_release);
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dbfull()->TEST_CompactRange(last, nullptr, nullptr); // Should fail
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ASSERT_EQ("bar", Get("foo"));
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// Recovery: should not lose data
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error_type->store(false, std::memory_order_release);
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Reopen(options);
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ASSERT_EQ("bar", Get("foo"));
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// Since paranoid_checks=false, writes should succeed
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ASSERT_OK(Put("foo2", "bar2"));
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ASSERT_EQ("bar", Get("foo"));
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ASSERT_EQ("bar2", Get("foo2"));
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}
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}
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#endif // ROCKSDB_LITE
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TEST_F(DBIOFailureTest, PutFailsParanoid) {
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// Test the following:
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// (a) A random put fails in paranoid mode (simulate by sync fail)
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// (b) All other puts have to fail, even if writes would succeed
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// (c) All of that should happen ONLY if paranoid_checks = true
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Options options = CurrentOptions();
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options.env = env_;
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options.create_if_missing = true;
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options.error_if_exists = false;
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options.paranoid_checks = true;
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DestroyAndReopen(options);
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CreateAndReopenWithCF({"pikachu"}, options);
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Status s;
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ASSERT_OK(Put(1, "foo", "bar"));
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ASSERT_OK(Put(1, "foo1", "bar1"));
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// simulate error
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env_->log_write_error_.store(true, std::memory_order_release);
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s = Put(1, "foo2", "bar2");
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ASSERT_TRUE(!s.ok());
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env_->log_write_error_.store(false, std::memory_order_release);
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s = Put(1, "foo3", "bar3");
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// the next put should fail, too
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ASSERT_TRUE(!s.ok());
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// but we're still able to read
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ASSERT_EQ("bar", Get(1, "foo"));
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// do the same thing with paranoid checks off
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options.paranoid_checks = false;
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DestroyAndReopen(options);
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CreateAndReopenWithCF({"pikachu"}, options);
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ASSERT_OK(Put(1, "foo", "bar"));
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ASSERT_OK(Put(1, "foo1", "bar1"));
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// simulate error
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env_->log_write_error_.store(true, std::memory_order_release);
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s = Put(1, "foo2", "bar2");
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ASSERT_TRUE(!s.ok());
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env_->log_write_error_.store(false, std::memory_order_release);
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s = Put(1, "foo3", "bar3");
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// the next put should NOT fail
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ASSERT_TRUE(s.ok());
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}
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} // namespace rocksdb
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int main(int argc, char** argv) {
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rocksdb::port::InstallStackTraceHandler();
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::testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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