fix

lbry/wallet/server/block_processor.py

@@ -275,6 +275,7 @@ class BlockProcessor:
         await self.run_in_thread_with_lock(self.db.sql.delete_claims_above_height, self.height)
         await self.prefetcher.reset_height(self.height)
         self.reorg_count_metric.inc()
+        await reopen_rocksdb_ctx(self.db.executor)
 
     async def reorg_hashes(self, count):
         """Return a pair (start, last, hashes) of blocks to back up during a
@@ -289,7 +290,7 @@ class BlockProcessor:
         self.logger.info(f'chain was reorganised replacing {count:,d} '
                          f'block{s} at heights {start:,d}-{last:,d}')
 
-        return start, last, await self.db.fs_block_hashes(start, count)
+        return start, last, self.db.fs_block_hashes(start, count)
 
     async def calc_reorg_range(self, count: Optional[int]):
         """Calculate the reorg range"""
@@ -307,7 +308,7 @@ class BlockProcessor:
             start = self.height - 1
             count = 1
             while start > 0:
-                hashes = await self.db.fs_block_hashes(start, count)
+                hashes = self.db.fs_block_hashes(start, count)
                 hex_hashes = [hash_to_hex_str(hash) for hash in hashes]
                 d_hex_hashes = await self.daemon.block_hex_hashes(start, count)
                 n = diff_pos(hex_hashes, d_hex_hashes)

lbry/wallet/server/leveldb.py

@@ -226,6 +226,11 @@ def read_headers():
     ]
 
 
+def read_block_file(path):
+    with util.open_file(path) as f:
+        return f.read(-1)
+
+
 def tx_hash(self, tx_num):
     """Return a par (tx_hash, tx_height) for the given tx number.
 
@@ -773,8 +778,9 @@ class LevelDB:
             self.executor, transaction_info_get_batch, txids
         )
 
-    async def fs_block_hashes(self, height, count):
+    def fs_block_hashes(self, height, count):
         if height + count > len(self.headers):
+            print("boom")
             raise self.DBError(f'only got {len(self.headers) - height:,d} headers starting at {height:,d}, not {count:,d}')
         return [self.coin.header_hash(header) for header in self.headers[height:height + count]]
 
@@ -823,11 +829,7 @@ class LevelDB:
         """Returns a raw block read from disk.  Raises FileNotFoundError
         if the block isn't on-disk."""
 
-        def read():
-            with util.open_file(self.raw_block_path(height)) as f:
-                return f.read(-1)
-
-        return await asyncio.get_event_loop().run_in_executor(self.executor, read)
+        return await asyncio.get_event_loop().run_in_executor(self.executor, read_block_file, self.raw_block_path(height))
 
     def write_raw_block(self, block, height):
         """Write a raw block to disk."""

lbry/wallet/server/merkle.py

@@ -196,7 +196,7 @@ class MerkleCache:
         # Start from the beginning of any final partial segment.
         # Retain the value of depth_higher; in practice this is fine
         start = self._leaf_start(self.length)
-        hashes = await self.source_func(start, length - start)
+        hashes = self.source_func(start, length - start)
         self.level[start >> self.depth_higher:] = self._level(hashes)
         self.length = length
 
@@ -208,7 +208,7 @@ class MerkleCache:
         level = self.level[:length >> self.depth_higher]
         leaf_start = self._leaf_start(length)
         count = min(self._segment_length(), length - leaf_start)
-        hashes = await self.source_func(leaf_start, count)
+        hashes = self.source_func(leaf_start, count)
         level += self._level(hashes)
         return level
 
@@ -216,7 +216,7 @@ class MerkleCache:
         """Call to initialize the cache to a source of given length."""
         self.length = length
         self.depth_higher = self.merkle.tree_depth(length) // 2
-        self.level = self._level(await self.source_func(0, length))
+        self.level = self._level(self.source_func(0, length))
         self.initialized.set()
 
     def truncate(self, length):
@@ -250,7 +250,7 @@ class MerkleCache:
         await self._extend_to(length)
         leaf_start = self._leaf_start(index)
         count = min(self._segment_length(), length - leaf_start)
-        leaf_hashes = await self.source_func(leaf_start, count)
+        leaf_hashes = self.source_func(leaf_start, count)
         if length < self._segment_length():
             return self.merkle.branch_and_root(leaf_hashes, index)
         level = await self._level_for(length)

tests/integration/blockchain/test_blockchain_reorganization.py

@@ -2,6 +2,15 @@ import logging
 import asyncio
 from binascii import hexlify
 from lbry.testcase import CommandTestCase
+from lbry.wallet.server.leveldb import proc_ctx
+
+
+def get_txids(height):
+    ctx = proc_ctx.get()
+    return [
+        ctx.ctx_tx_hash(tx_num)[0][::-1].hex()
+        for tx_num in range(ctx.tx_counts[height - 1], ctx.tx_counts[height])
+    ]
 
 
 class BlockchainReorganizationTests(CommandTestCase):
@@ -11,18 +20,12 @@ class BlockchainReorganizationTests(CommandTestCase):
     async def assertBlockHash(self, height):
         bp = self.conductor.spv_node.server.bp
 
-        def get_txids():
-            return [
-                bp.db.fs_tx_hash(tx_num)[0][::-1].hex()
-                for tx_num in range(bp.db.tx_counts[height - 1], bp.db.tx_counts[height])
-            ]
-
         block_hash = await self.blockchain.get_block_hash(height)
 
         self.assertEqual(block_hash, (await self.ledger.headers.hash(height)).decode())
-        self.assertEqual(block_hash, (await bp.db.fs_block_hashes(height, 1))[0][::-1].hex())
+        self.assertEqual(block_hash, (bp.db.fs_block_hashes(height, 1))[0][::-1].hex())
 
-        txids = await asyncio.get_event_loop().run_in_executor(bp.db.executor, get_txids)
+        txids = await asyncio.get_event_loop().run_in_executor(bp.db.executor, get_txids, height)
         txs = await bp.db.fs_transactions(txids)
         block_txs = (await bp.daemon.deserialised_block(block_hash))['tx']
         self.assertSetEqual(set(block_txs), set(txs.keys()), msg='leveldb/lbrycrd is missing transactions')