Seems like TransactionSynchronizer has been rolled back to state it was in August. I think this was caused by little typo in commit 469b4c303dd0d5c39f3476a5972556d8b9537b44

296: Record record = records.get(tx);
But 'records' map uses TransactionKey as key and above line should be written as

296:TransactionKey key = new TransactionKey(tx);
297: Record record = records.get(key);

I've checked 1.0.22 containing applied fix and mem-leaks and deadlocks are all gone