Fix duplicated ID DTFile that cause inconsistent query result (pingca…

…p#2770) (pingcap#2772)

* Add guard for adding DTFiles with duplicated id
* Get rid of generating DTFile with duplicated ID
Signed-off-by: JaySon-Huang <[email protected]>

.gitignore

@@ -6,6 +6,10 @@
 # vscode clangd cache
 .cache
 
+# JSON Compilation Database Format Specification
+# https://clang.llvm.org/docs/JSONCompilationDatabase.html
+compile_commands.json
+
 # git patch reject report
 *.rej
 

dbms/src/Common/FailPoint.cpp

@@ -58,7 +58,8 @@ std::unordered_map<String, std::shared_ptr<FailPointChannel>> FailPointHelper::f
     M(random_slow_page_storage_remove_expired_snapshots)     \
     M(random_slow_page_storage_list_all_live_files)          \
     M(force_set_safepoint_when_decode_block)                 \
-    M(force_set_page_data_compact_batch)
+    M(force_set_page_data_compact_batch)                     \
+    M(force_set_dtfile_exist_when_acquire_id)
 
 #define APPLY_FOR_FAILPOINTS_ONCE_WITH_CHANNEL(M) \
     M(pause_after_learner_read)                   \

dbms/src/Storages/DeltaMerge/Delta/DeltaValueSpace.cpp

@@ -163,10 +163,11 @@ DeltaPacks DeltaValueSpace::checkHeadAndCloneTail(DMContext &         context,
         }
         else if (auto f = pack->tryToFile(); f)
         {
-            auto new_ref_id = context.storage_pool.newDataPageId();
-            auto file_id    = f->getFile()->fileId();
+            auto delegator = context.path_pool.getStableDiskDelegator();
+            auto new_ref_id = context.storage_pool.newDataPageIdForDTFile(delegator, __PRETTY_FUNCTION__);
+            auto file_id = f->getFile()->fileId();
             wbs.data.putRefPage(new_ref_id, file_id);
-            auto file_parent_path = context.path_pool.getStableDiskDelegator().getDTFilePath(file_id);
+            auto file_parent_path = delegator.getDTFilePath(file_id);
             auto new_file = DMFile::restore(context.db_context.getFileProvider(), file_id, /* ref_id= */ new_ref_id, file_parent_path);
 
             auto new_pack = f->cloneWith(context, new_file, target_range);

dbms/src/Storages/DeltaMerge/DeltaMergeStore.cpp

@@ -571,7 +571,7 @@ std::tuple<String, PageId> DeltaMergeStore::preAllocateIngestFile()
 
     auto delegator   = path_pool.getStableDiskDelegator();
     auto parent_path = delegator.choosePath();
-    auto new_id      = storage_pool.newDataPageId();
+    auto new_id      = storage_pool.newDataPageIdForDTFile(delegator, __PRETTY_FUNCTION__);
     return {parent_path, new_id};
 }
 
@@ -679,7 +679,7 @@ void DeltaMergeStore::ingestFiles(const DMContextPtr &        dm_context,
                 /// Generate DMFile instance with a new ref_id pointed to the file_id.
                 auto   file_id          = file->fileId();
                 auto & file_parent_path = file->parentPath();
-                auto   ref_id           = storage_pool.newDataPageId();
+                auto   ref_id           = storage_pool.newDataPageIdForDTFile(delegate, __PRETTY_FUNCTION__);
 
                 auto ref_file = DMFile::restore(file_provider, file_id, ref_id, file_parent_path);
                 auto pack     = std::make_shared<DeltaPackFile>(*dm_context, ref_file, segment_range);

dbms/src/Storages/DeltaMerge/StoragePool.cpp

@@ -1,44 +1,50 @@
+#include <Common/FailPoint.h>
 #include <Interpreters/Context.h>
 #include <Interpreters/Settings.h>
 #include <Storages/DeltaMerge/StoragePool.h>
 #include <Storages/Page/ConfigSettings.h>
 #include <Storages/PathPool.h>
+#include <fmt/format.h>
 
 namespace DB
 {
+namespace FailPoints
+{
+extern const char force_set_dtfile_exist_when_acquire_id[];
+} // namespace FailPoints
 namespace DM
 {
 enum class StorageType
 {
-    Log  = 1,
+    Log = 1,
     Data = 2,
     Meta = 3,
 };
 
 PageStorage::Config extractConfig(const Settings & settings, StorageType subtype)
 {
 #define SET_CONFIG(NAME)                                                            \
-    config.num_write_slots   = settings.dt_storage_pool_##NAME##_write_slots;       \
-    config.gc_min_files      = settings.dt_storage_pool_##NAME##_gc_min_file_num;   \
-    config.gc_min_bytes      = settings.dt_storage_pool_##NAME##_gc_min_bytes;      \
+    config.num_write_slots = settings.dt_storage_pool_##NAME##_write_slots;         \
+    config.gc_min_files = settings.dt_storage_pool_##NAME##_gc_min_file_num;        \
+    config.gc_min_bytes = settings.dt_storage_pool_##NAME##_gc_min_bytes;           \
     config.gc_min_legacy_num = settings.dt_storage_pool_##NAME##_gc_min_legacy_num; \
     config.gc_max_valid_rate = settings.dt_storage_pool_##NAME##_gc_max_valid_rate;
 
     PageStorage::Config config = getConfigFromSettings(settings);
 
     switch (subtype)
     {
-    case StorageType::Log:
-        SET_CONFIG(log);
-        break;
-    case StorageType::Data:
-        SET_CONFIG(data);
-        break;
-    case StorageType::Meta:
-        SET_CONFIG(meta);
-        break;
-    default:
-        throw Exception("Unknown subtype in extractConfig: " + DB::toString(static_cast<Int32>(subtype)));
+        case StorageType::Log:
+            SET_CONFIG(log);
+            break;
+        case StorageType::Data:
+            SET_CONFIG(data);
+            break;
+        case StorageType::Meta:
+            SET_CONFIG(meta);
+            break;
+        default:
+            throw Exception("Unknown subtype in extractConfig: " + DB::toString(static_cast<Int32>(subtype)));
     }
 #undef SET_CONFIG
 
@@ -47,37 +53,31 @@ PageStorage::Config extractConfig(const Settings & settings, StorageType subtype
 
 StoragePool::StoragePool(const String & name, StoragePathPool & path_pool, const Context & global_ctx, const Settings & settings)
     : // The iops and bandwidth in log_storage are relatively high, use multi-disks if possible
-      log_storage(name + ".log",
-                  path_pool.getPSDiskDelegatorMulti("log"),
-                  extractConfig(settings, StorageType::Log),
-                  global_ctx.getFileProvider(),
-                  global_ctx.getTiFlashMetrics()),
+      log_storage(
+          name + ".log", path_pool.getPSDiskDelegatorMulti("log"), extractConfig(settings, StorageType::Log), global_ctx.getFileProvider()),
       // The iops in data_storage is low, only use the first disk for storing data
       data_storage(name + ".data",
-                   path_pool.getPSDiskDelegatorSingle("data"),
-                   extractConfig(settings, StorageType::Data),
-                   global_ctx.getFileProvider(),
-                   global_ctx.getTiFlashMetrics()),
+          path_pool.getPSDiskDelegatorSingle("data"),
+          extractConfig(settings, StorageType::Data),
+          global_ctx.getFileProvider()),
       // The iops in meta_storage is relatively high, use multi-disks if possible
       meta_storage(name + ".meta",
-                   path_pool.getPSDiskDelegatorMulti("meta"),
-                   extractConfig(settings, StorageType::Meta),
-                   global_ctx.getFileProvider(),
-                   global_ctx.getTiFlashMetrics()),
+          path_pool.getPSDiskDelegatorMulti("meta"),
+          extractConfig(settings, StorageType::Meta),
+          global_ctx.getFileProvider()),
       max_log_page_id(0),
       max_data_page_id(0),
       max_meta_page_id(0),
       global_context(global_ctx)
-{
-}
+{}
 
 void StoragePool::restore()
 {
     log_storage.restore();
     data_storage.restore();
     meta_storage.restore();
 
-    max_log_page_id  = log_storage.getMaxId();
+    max_log_page_id = log_storage.getMaxId();
     max_data_page_id = data_storage.getMaxId();
     max_meta_page_id = meta_storage.getMaxId();
 }
@@ -89,6 +89,36 @@ void StoragePool::drop()
     log_storage.drop();
 }
 
+PageId StoragePool::newDataPageIdForDTFile(StableDiskDelegator & delegator, const char * who)
+{
+    // In case that there is a DTFile created on disk but TiFlash crashes without persisting the ID.
+    // After TiFlash process restored, the ID will be inserted into the stable delegator, but we may
+    // get a duplicated ID from the `storage_pool.data`. (tics#2756)
+    PageId dtfile_id;
+    do
+    {
+        dtfile_id = ++max_data_page_id;
+
+        auto existed_path = delegator.getDTFilePath(dtfile_id, /*throw_on_not_exist=*/false);
+        fiu_do_on(FailPoints::force_set_dtfile_exist_when_acquire_id, {
+            static size_t fail_point_called = 0;
+            if (existed_path.empty() && fail_point_called % 10 == 0)
+            {
+                existed_path = "<mock for existed path>";
+            }
+            fail_point_called++;
+        });
+        if (likely(existed_path.empty()))
+        {
+            break;
+        }
+        // else there is a DTFile with that id, continue to acquire a new ID.
+        LOG_WARNING(&Poco::Logger::get(who),
+            fmt::format("The DTFile is already exists, continute to acquire another ID. [path={}] [id={}]", existed_path, dtfile_id));
+    } while (true);
+    return dtfile_id;
+}
+
 bool StoragePool::gc(const Settings & /*settings*/, const Seconds & try_gc_period)
 {
     {
@@ -102,8 +132,8 @@ bool StoragePool::gc(const Settings & /*settings*/, const Seconds & try_gc_perio
     }
 
     bool done_anything = false;
-    auto write_limiter  = global_context.getWriteLimiter();
-    auto read_limiter  = global_context.getReadLimiter();
+    auto write_limiter = global_context.getWriteLimiter();
+    auto read_limiter = global_context.getReadLimiter();
     // FIXME: The global_context.settings is mutable, we need a way to reload thses settings.
     // auto config = extractConfig(settings, StorageType::Meta);
     // meta_storage.reloadSettings(config);

dbms/src/Storages/DeltaMerge/StoragePool.h

@@ -10,6 +10,7 @@ namespace DB
 struct Settings;
 class Context;
 class StoragePathPool;
+class StableDiskDelegator;
 
 namespace DM
 {
@@ -19,10 +20,10 @@ static const std::chrono::seconds DELTA_MERGE_GC_PERIOD(60);
 class StoragePool : private boost::noncopyable
 {
 public:
-    using Clock     = std::chrono::system_clock;
+    using Clock = std::chrono::system_clock;
     using Timepoint = Clock::time_point;
-    using Duration  = Clock::duration;
-    using Seconds   = std::chrono::seconds;
+    using Duration = Clock::duration;
+    using Seconds = std::chrono::seconds;
 
     StoragePool(const String & name, StoragePathPool & path_pool, const Context & global_ctx, const Settings & settings);
 
@@ -33,9 +34,10 @@ class StoragePool : private boost::noncopyable
     PageId maxMetaPageId() { return max_meta_page_id; }
 
     PageId newLogPageId() { return ++max_log_page_id; }
-    PageId newDataPageId() { return ++max_data_page_id; }
     PageId newMetaPageId() { return ++max_meta_page_id; }
 
+    PageId newDataPageIdForDTFile(StableDiskDelegator & delegator, const char * who);
+
     PageStorage & log() { return log_storage; }
     PageStorage & data() { return data_storage; }
     PageStorage & meta() { return meta_storage; }
@@ -58,7 +60,7 @@ class StoragePool : private boost::noncopyable
 
     std::mutex mutex;
 
-    const Context& global_context;
+    const Context & global_context;
 };
 
 struct StorageSnapshot : private boost::noncopyable
@@ -67,8 +69,7 @@ struct StorageSnapshot : private boost::noncopyable
         : log_reader(storage.log(), snapshot_read ? storage.log().getSnapshot() : nullptr, read_limiter),
           data_reader(storage.data(), snapshot_read ? storage.data().getSnapshot() : nullptr, read_limiter),
           meta_reader(storage.meta(), snapshot_read ? storage.meta().getSnapshot() : nullptr, read_limiter)
-    {
-    }
+    {}
 
     PageReader log_reader;
     PageReader data_reader;

dbms/src/Storages/DeltaMerge/tests/dm_basic_include.h

@@ -32,8 +32,7 @@ inline ::testing::AssertionResult HandleRangeCompare(const char *        lhs_exp
 {
     if (lhs == rhs)
         return ::testing::AssertionSuccess();
-    else
-        return ::testing::internal::EqFailure(lhs_expr, rhs_expr, lhs.toDebugString(), rhs.toDebugString(), false);
+    return ::testing::internal::EqFailure(lhs_expr, rhs_expr, lhs.toDebugString(), rhs.toDebugString(), false);
 }
 /// helper functions for comparing HandleRange
 inline ::testing::AssertionResult RowKeyRangeCompare(const char *        lhs_expr,
@@ -43,8 +42,7 @@ inline ::testing::AssertionResult RowKeyRangeCompare(const char *        lhs_exp
 {
     if (lhs == rhs)
         return ::testing::AssertionSuccess();
-    else
-        return ::testing::internal::EqFailure(lhs_expr, rhs_expr, lhs.toDebugString(), rhs.toDebugString(), false);
+    return ::testing::internal::EqFailure(lhs_expr, rhs_expr, lhs.toDebugString(), rhs.toDebugString(), false);
 }
 #define ASSERT_RANGE_EQ(val1, val2) ASSERT_PRED_FORMAT2(::DB::DM::tests::HandleRangeCompare, val1, val2)
 #define ASSERT_ROWKEY_RANGE_EQ(val1, val2) ASSERT_PRED_FORMAT2(::DB::DM::tests::RowKeyRangeCompare, val1, val2)

dbms/src/Storages/DeltaMerge/tests/gtest_dm_delta_merge_store.cpp

@@ -1323,7 +1323,7 @@ try
                                             /* max_version= */ tso1,
                                             EMPTY_FILTER,
                                             /* expected_block_size= */ 1024);
-        ASSERT_EQ(ins.size(), 1UL);
+        ASSERT_EQ(ins.size(), 1);
         BlockInputStreamPtr in = ins[0];
 
         size_t num_rows_read = 0;
@@ -1345,7 +1345,7 @@ try
             num_rows_read += block.rows();
         }
         in->readSuffix();
-        EXPECT_EQ(num_rows_read, 32UL) << "Data [32, 128) before ingest should be erased, should only get [0, 32)";
+        EXPECT_EQ(num_rows_read, 32) << "Data [32, 128) before ingest should be erased, should only get [0, 32)";
     }
 
     {
@@ -1359,15 +1359,15 @@ try
                                             /* max_version= */ std::numeric_limits<UInt64>::max(),
                                             EMPTY_FILTER,
                                             /* expected_block_size= */ 1024);
-        ASSERT_EQ(ins.size(), 1UL);
+        ASSERT_EQ(ins.size(), 1);
         BlockInputStreamPtr in = ins[0];
 
         size_t num_rows_read = 0;
         in->readPrefix();
         while (Block block = in->read())
             num_rows_read += block.rows();
         in->readSuffix();
-        EXPECT_EQ(num_rows_read, 32UL) << "The rows number after ingest is not match";
+        EXPECT_EQ(num_rows_read, 32) << "The rows number after ingest is not match";
     }
 }
 CATCH

dbms/src/Storages/DeltaMerge/tests/gtest_dm_segment.cpp

@@ -1033,22 +1033,22 @@ class Segment_test_2 : public Segment_test, public testing::WithParamInterface<S
 
     std::pair<RowKeyRange, std::vector<PageId>> genDMFile(DMContext & context, const Block & block)
     {
-        auto file_id      = context.storage_pool.newDataPageId();
+        auto delegator = context.path_pool.getStableDiskDelegator();
+        auto file_id = context.storage_pool.newDataPageIdForDTFile(delegator, __PRETTY_FUNCTION__);
         auto input_stream = std::make_shared<OneBlockInputStream>(block);
-        auto delegate     = context.path_pool.getStableDiskDelegator();
-        auto store_path   = delegate.choosePath();
+        auto store_path = delegator.choosePath();
 
         DMFileBlockOutputStream::Flags flags;
         flags.setSingleFile(DMTestEnv::getPseudoRandomNumber() % 2);
 
         auto dmfile
             = writeIntoNewDMFile(context, std::make_shared<ColumnDefines>(*tableColumns()), input_stream, file_id, store_path, flags);
 
-        delegate.addDTFile(file_id, dmfile->getBytesOnDisk(), store_path);
+        delegator.addDTFile(file_id, dmfile->getBytesOnDisk(), store_path);
 
-        auto &      pk_column = block.getByPosition(0).column;
-        auto        min_pk    = pk_column->getInt(0);
-        auto        max_pk    = pk_column->getInt(block.rows() - 1);
+        auto & pk_column = block.getByPosition(0).column;
+        auto min_pk = pk_column->getInt(0);
+        auto max_pk = pk_column->getInt(block.rows() - 1);
         HandleRange range(min_pk, max_pk + 1);
 
         return {RowKeyRange::fromHandleRange(range), {file_id}};
@@ -1080,7 +1080,6 @@ try
                 auto file_parent_path  = delegate.getDTFilePath(file_id);
                 auto file              = DMFile::restore(file_provider, file_id, file_id, file_parent_path);
                 auto pack              = std::make_shared<DeltaPackFile>(dmContext(), file, range);
-                delegate.addDTFile(file_id, file->getBytesOnDisk(), file_parent_path);
                 WriteBatches wbs(*storage_pool);
                 wbs.data.putExternal(file_id, 0);
                 wbs.writeLogAndData();