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Fix daedlock

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This commit is contained in:
Erik Johnston 2015-05-15 10:54:04 +01:00
parent 1d566edb81
commit a2c4f3f150
7 changed files with 118 additions and 80 deletions
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26
synapse/storage/_base.py
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@ -301,10 +301,12 @@ class SQLBaseStore(object):
self._get_event_cache = Cache("*getEvent*", keylen=3, lru=True,
max_entries=hs.config.event_cache_size)
self._event_fetch_lock = threading.Condition()
self._event_fetch_lock = threading.Lock()
self._event_fetch_list = []
self._event_fetch_ongoing = 0
self._pending_ds = []
self.database_engine = hs.database_engine
self._stream_id_gen = StreamIdGenerator()
@ -344,8 +346,7 @@ class SQLBaseStore(object):
self._clock.looping_call(loop, 10000)
@contextlib.contextmanager
def _new_transaction(self, conn, desc, after_callbacks):
def _new_transaction(self, conn, desc, after_callbacks, func, *args, **kwargs):
start = time.time() * 1000
txn_id = self._TXN_ID
@ -366,6 +367,9 @@ class SQLBaseStore(object):
txn = LoggingTransaction(
txn, name, self.database_engine, after_callbacks
)
r = func(txn, *args, **kwargs)
conn.commit()
return r
except self.database_engine.module.OperationalError as e:
# This can happen if the database disappears mid
# transaction.
@ -398,17 +402,6 @@ class SQLBaseStore(object):
)
continue
raise
try:
yield txn
conn.commit()
return
except:
try:
conn.rollback()
except:
pass
raise
except Exception as e:
logger.debug("[TXN FAIL] {%s} %s", name, e)
raise
@ -440,8 +433,9 @@ class SQLBaseStore(object):
conn.reconnect()
current_context.copy_to(context)
with self._new_transaction(conn, desc, after_callbacks) as txn:
return func(txn, *args, **kwargs)
return self._new_transaction(
conn, desc, after_callbacks, func, *args, **kwargs
)
result = yield preserve_context_over_fn(
self._db_pool.runWithConnection,