Revert "Delete filter before closing the table"

Summary:
This reverts commit 89833577a8.
Closes https://github.com/facebook/rocksdb/pull/2240

Differential Revision: D4986982

Pulled By: maysamyabandeh

fbshipit-source-id: 56c4c07b7b5b7c6fe122d5c2f2199d221c8510c0

table/block_based_table_factory.cc

@@ -101,11 +101,6 @@ Status BlockBasedTableFactory::SanitizeOptions(
         "Unsupported BlockBasedTable format_version. Please check "
         "include/rocksdb/table.h for more info");
   }
-  if (table_options_.block_cache &&
-      table_options_.no_block_cache) {
-    return Status::InvalidArgument("Block cache is initialized"
-        ", but it is disabled");
-  }
   return Status::OK();
 }
 

table/block_based_table_reader.cc

@@ -2063,17 +2063,21 @@ Status BlockBasedTable::DumpTable(WritableFile* out_file) {
 }
 
 void BlockBasedTable::Close() {
-  const bool force_erase = true;
-  auto block_cache = rep_->table_options.block_cache.get();
-  if (block_cache) {
-    // The filter_entry and inde_entry's lifetime ends with table's and is
-    // forced to be released.
-    // Note that if the xxx_entry is not set then the cached entry might remian
-    // in the  cache for some more time. The destrcutor hence must take int
-    // account that the table object migth no longer be available.
-    rep_->filter_entry.Release(block_cache, force_erase);
-    rep_->index_entry.Release(block_cache, force_erase);
-    rep_->range_del_entry.Release(block_cache);
+  rep_->filter_entry.Release(rep_->table_options.block_cache.get());
+  rep_->index_entry.Release(rep_->table_options.block_cache.get());
+  rep_->range_del_entry.Release(rep_->table_options.block_cache.get());
+  // cleanup index and filter blocks to avoid accessing dangling pointer
+  if (!rep_->table_options.no_block_cache) {
+    char cache_key[kMaxCacheKeyPrefixSize + kMaxVarint64Length];
+    // Get the filter block key
+    auto key = GetCacheKey(rep_->cache_key_prefix, rep_->cache_key_prefix_size,
+                           rep_->footer.metaindex_handle(), cache_key);
+    rep_->table_options.block_cache.get()->Erase(key);
+    // Get the index block key
+    key = GetCacheKeyFromOffset(rep_->cache_key_prefix,
+                                rep_->cache_key_prefix_size,
+                                rep_->dummy_index_reader_offset, cache_key);
+    rep_->table_options.block_cache.get()->Erase(key);
   }
 }
 

table/block_based_table_reader.h

@@ -370,10 +370,9 @@ struct BlockBasedTable::CachableEntry {
   CachableEntry(TValue* _value, Cache::Handle* _cache_handle)
       : value(_value), cache_handle(_cache_handle) {}
   CachableEntry() : CachableEntry(nullptr, nullptr) {}
-  void Release(Cache* cache, bool force_erase = false) {
+  void Release(Cache* cache) {
     if (cache_handle) {
-      bool erased = cache->Release(cache_handle, force_erase);
-      assert(!force_erase || erased);
+      cache->Release(cache_handle);
       value = nullptr;
       cache_handle = nullptr;
     }

table/partitioned_filter_block.cc

@@ -82,21 +82,16 @@ PartitionedFilterBlockReader::PartitionedFilterBlockReader(
     : FilterBlockReader(contents.data.size(), stats, _whole_key_filtering),
       prefix_extractor_(prefix_extractor),
       comparator_(comparator),
-      table_(table),
-      block_cache_(table_->rep_->table_options.block_cache.get()){
+      table_(table) {
   idx_on_fltr_blk_.reset(new Block(std::move(contents),
                                    kDisableGlobalSequenceNumber,
                                    0 /* read_amp_bytes_per_bit */, stats));
 }
 
 PartitionedFilterBlockReader::~PartitionedFilterBlockReader() {
-  // The destructor migh be called via cache evict after the table is deleted.
-  // We should avoid using table_ pointer in destructor then.
-  if (block_cache_) {
   ReadLock rl(&mu_);
   for (auto it = handle_list_.begin(); it != handle_list_.end(); ++it) {
-      block_cache_->Release(*it);
-    }
+    table_->rep_->table_options.block_cache.get()->Release(*it);
   }
 }
 
@@ -127,7 +122,7 @@ bool PartitionedFilterBlockReader::KeyMayMatch(
     return res;
   }
   if (LIKELY(filter_partition.IsSet())) {
-    filter_partition.Release(block_cache_);
+    filter_partition.Release(table_->rep_->table_options.block_cache.get());
   } else {
     delete filter_partition.value;
   }
@@ -159,7 +154,7 @@ bool PartitionedFilterBlockReader::PrefixMayMatch(
     return res;
   }
   if (LIKELY(filter_partition.IsSet())) {
-    filter_partition.Release(block_cache_);
+    filter_partition.Release(table_->rep_->table_options.block_cache.get());
   } else {
     delete filter_partition.value;
   }
@@ -187,7 +182,8 @@ PartitionedFilterBlockReader::GetFilterPartition(Slice* handle_value,
   auto s = fltr_blk_handle.DecodeFrom(handle_value);
   assert(s.ok());
   const bool is_a_filter_partition = true;
-  if (LIKELY(block_cache_ != nullptr)) {
+  auto block_cache = table_->rep_->table_options.block_cache.get();
+  if (LIKELY(block_cache != nullptr)) {
     bool pin_cached_filters =
         GetLevel() == 0 &&
         table_->rep_->table_options.pin_l0_filter_and_index_blocks_in_cache;

table/partitioned_filter_block.h

@@ -85,7 +85,6 @@ class PartitionedFilterBlockReader : public FilterBlockReader {
   std::unique_ptr<Block> idx_on_fltr_blk_;
   const Comparator& comparator_;
   const BlockBasedTable* table_;
-  Cache* block_cache_;
   std::unordered_map<uint64_t, FilterBlockReader*> filter_cache_;
   autovector<Cache::Handle*> handle_list_;
   port::RWMutex mu_;

table/table_test.cc

@@ -9,6 +9,7 @@
 // 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 <inttypes.h>
 #include <stdio.h>
 
 #include <algorithm>
@@ -1849,10 +1850,7 @@ TEST_F(BlockBasedTableTest, FilterBlockInBlockCache) {
   // -- Table construction
   Options options;
   options.create_if_missing = true;
-  // Keep a ref to statistic to prevent it from being destructed before
-  // block cache gets cleaned up upon next table_factory.reset
-  auto statistics = CreateDBStatistics();
-  options.statistics = statistics;
+  options.statistics = CreateDBStatistics();
 
   // Enable the cache for index/filter blocks
   BlockBasedTableOptions table_options;
@@ -1932,17 +1930,15 @@ TEST_F(BlockBasedTableTest, FilterBlockInBlockCache) {
   }
   // release the iterator so that the block cache can reset correctly.
   iter.reset();
+
   c.ResetTableReader();
 
   // -- PART 2: Open with very small block cache
   // In this test, no block will ever get hit since the block cache is
   // too small to fit even one entry.
   table_options.block_cache = NewLRUCache(1, 4);
+  options.statistics = CreateDBStatistics();
   options.table_factory.reset(new BlockBasedTableFactory(table_options));
-  // Keep a ref to statistic to prevent it from being destructed before
-  // block cache gets cleaned up upon next table_factory.reset
-  statistics = CreateDBStatistics();
-  options.statistics = statistics;
   const ImmutableCFOptions ioptions2(options);
   c.Reopen(ioptions2);
   {
@@ -1997,10 +1993,7 @@ TEST_F(BlockBasedTableTest, FilterBlockInBlockCache) {
   // Open table with filter policy
   table_options.filter_policy.reset(NewBloomFilterPolicy(1));
   options.table_factory.reset(new BlockBasedTableFactory(table_options));
-  // Keep a ref to statistic to prevent it from being destructed before
-  // block cache gets cleaned up upon next table_factory.reset
-  statistics = CreateDBStatistics();
-  options.statistics = statistics;
+  options.statistics = CreateDBStatistics();
   ImmutableCFOptions ioptions4(options);
   ASSERT_OK(c3.Reopen(ioptions4));
   reader = dynamic_cast<BlockBasedTable*>(c3.GetTableReader());