diff --git a/docs/RELEASE-NOTES b/docs/RELEASE-NOTES
index cf34aed..aea65ec 100644
--- a/docs/RELEASE-NOTES
+++ b/docs/RELEASE-NOTES
@@ -1,3 +1,10 @@
+Version 0.2.2.1
+---------------
+
+- fixes issues #12, #13
+- only attempt to flush on asyncio.CancelledError to avoid spurious
+  secondary errors
+
 Version 0.2.2
 -------------
 
diff --git a/server/block_processor.py b/server/block_processor.py
index feb4eee..1eee6b1 100644
--- a/server/block_processor.py
+++ b/server/block_processor.py
@@ -382,8 +382,9 @@ class BlockProcessor(server.db.DB):
             while True:
                 await self._wait_for_update()
                 await asyncio.sleep(0)   # Yield
-        finally:
+        except asyncio.CancelledError:
             self.flush(True)
+            raise
 
     async def _wait_for_update(self):
         '''Wait for the prefetcher to deliver blocks or a mempool update.
@@ -535,6 +536,9 @@ class BlockProcessor(server.db.DB):
                                  self.height - self.db_height))
         self.utxo_cache.flush(batch)
         self.utxo_flush_count = self.flush_count
+        self.db_tx_count = self.tx_count
+        self.db_height = self.height
+        self.db_tip = self.tip
 
     def assert_flushed(self):
         '''Asserts state is fully flushed.'''
@@ -572,13 +576,6 @@ class BlockProcessor(server.db.DB):
             self.flush_state(batch)
             self.logger.info('committing transaction...')
 
-        # Update our in-memory state after successful flush
-        self.db_tx_count = self.tx_count
-        self.db_height = self.height
-        self.db_tip = self.tip
-        self.tx_hashes = []
-        self.headers = []
-
         # Update and put the wall time again - otherwise we drop the
         # time it took to commit the batch
         self.flush_state(self.db)
@@ -670,6 +667,8 @@ class BlockProcessor(server.db.DB):
 
         os.sync()
 
+        self.tx_hashes = []
+        self.headers = []
         self.logger.info('FS flush took {:.1f} seconds'
                          .format(time.time() - flush_start))
 
diff --git a/server/db.py b/server/db.py
index 414eb75..51b2c59 100644
--- a/server/db.py
+++ b/server/db.py
@@ -119,7 +119,6 @@ class DB(LoggedClass):
 
         if tx_height > self.db_height:
             return None, tx_height
-            raise self.DBError('tx_num {:,d} is not on disk')
 
         file_pos = tx_num * 32
         file_num, offset = divmod(file_pos, self.tx_hash_file_size)
diff --git a/server/protocol.py b/server/protocol.py
index 0ea78f6..5f5ae54 100644
--- a/server/protocol.py
+++ b/server/protocol.py
@@ -331,8 +331,8 @@ class ElectrumX(JSONRPC):
 
     @classmethod
     def watched_address_count(cls):
-        sessions = self.SESSION_MGR.sessions
-        return sum(len(session.hash168s) for session in session
+        sessions = cls.SESSION_MGR.sessions
+        return sum(len(session.hash168s) for session in sessions
                    if isinstance(session, cls))
 
     @classmethod
diff --git a/server/version.py b/server/version.py
index 79efc29..e6541a2 100644
--- a/server/version.py
+++ b/server/version.py
@@ -1 +1 @@
-VERSION = "ElectrumX 0.2.2"
+VERSION = "ElectrumX 0.2.2.1"