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From serg38 <>
Subject [GitHub] cloudstack issue #1762: CLOUDSTACK-9595 Transactions are not getting retried...
Date Fri, 25 Nov 2016 01:03:33 GMT
Github user serg38 commented on the issue:
    @rafaelweingartner Looks  like the deadlocks 2 and 3 are the same. I scanned our production
 log  and since last December we had 6400 deadlocks. Out of them close to 6000 were Deadlock
    20 were Deadlock 2 and 700 of a different Deadlock 5. The other deadlocks were in negligible
numbers. I think if we figure out Deadlock 1 and Deadlock 5 this will be good start. I will
try to find the source of transactions for them. In production we run a commercial distribution
based in most part on  4.7 branch of ACS. 
    Deadlock 5
    *** (1) TRANSACTION:
    TRANSACTION D518886F8, ACTIVE 2 sec fetching rows
    mysql tables in use 4, locked 4
    LOCK WAIT 24 lock struct(s), heap size 3112, 8 row lock(s), undo log entries 17
    MySQL thread id 29781, OS thread handle 0x7f9df36db700, query id 3625404021 cloud Sorting result
    SELECT, user_ip_address.account_id, user_ip_address.domain_id, user_ip_address.public_ip_address,
user_ip_address.data_center_id, user_ip_address.source_n
    at, user_ip_address.allocated, user_ip_address.vlan_db_id, user_ip_address.one_to_one_nat,
user_ip_address.vm_id, user_ip_address.state, user_ip_address.mac_address, user_ip
    _address.source_network_id, user_ip_address.network_id, user_ip_address.uuid, user_ip_address.physical_network_id,
user_ip_address.is_system, user_ip_address.vpc_id, user_ip
    _address.dnat_vmip, user_ip_address.is_portable, user_ip_address.display, user_ip_address.removed,
user_ip_address.created FROM user_ip_address  INNER JOIN vlan ON user_ip_a WHERE user_ip_address.data_center_id = 6  AND user_ip_address.allocated
IS NULL  AND user_ip_address.vlan_db_id IN (32,33,36,37,41,61,62,91,92,93,9
    *** (2) TRANSACTION:
    TRANSACTION D5188582B, ACTIVE 17 sec updating or deleting, thread declared inside InnoDB
    mysql tables in use 1, locked 1
    25 lock struct(s), heap size 3112, 13 row lock(s), undo log entries 18
    MySQL thread id 29820, OS thread handle 0x7fa35a868700, query id 3625417999 cloud Updating
    UPDATE user_ip_address SET user_ip_address.source_nat=0, user_ip_address.is_system=0,
user_ip_address.account_id=3309, user_ip_address.allocated='2016-03-25 15:36:39', user_ip_address.state='Allocated',
user_ip_address.domain_id=335 WHERE = 3284
    *** (2) HOLDS THE LOCK(S):

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