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https://issues.apache.org/jira/browse/CLOUDSTACK-9317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15964065#comment-15964065
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ASF GitHub Bot commented on CLOUDSTACK-9317:
--------------------------------------------

Github user jayapalu commented on a diff in the pull request:

    https://github.com/apache/cloudstack/pull/1908#discussion_r110854097
  
    --- Diff: setup/db/db/schema-4920to41000.sql ---
    @@ -230,5 +230,11 @@ JOIN `cloud`.`vm_snapshots` s ON 
(s.service_offering_id = o.id AND s.vm_id = v.i
     WHERE (o.cpu is null AND o.speed IS NULL AND o.ram_size IS NULL) AND
     (d.name = 'cpuNumber' OR d.name = 'cpuSpeed' OR d.name = 'memory');
     
    +<<<<<<< 1c48deefe9b534198cad19b5528ce0dcfa8d04a5
     -- CLOUDSTACK-9827: Storage tags stored in multiple places
     DROP VIEW IF EXISTS `cloud`.`storage_tag_view`;
    +
    +ALTER TABLE `user_ip_address` ADD COLUMN `rule_state` VARCHAR(32) COMMENT 
'static  rule state while removing';
    +=======
    --- End diff --
    
    Corrected


> Disabling static NAT on many IPs can leave wrong IPs on the router
> ------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-9317
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9317
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the 
> default.) 
>          Components: Management Server, Virtual Router
>    Affects Versions: 4.7.0, 4.7.1, 4.7.2
>            Reporter: Jeff Hair
>
> The current behavior of enabling or disabling static NAT will call the apply 
> IP associations method in the management server. The method is not 
> thread-safe. If it's called from multiple threads, each thread will load up 
> the list of public IPs in different states (add or revoke)--correct for the 
> thread, but not correct overall. Depending on execution order on the virtual 
> router, the router can end up with public IPs assigned to it that are not 
> supposed to be on it anymore. When another account acquires the same IP, this 
> of course leads to network problems.
> The problem has been in CS since at least 4.2, and likely affects all 
> recently released versions. Affected version is set to 4.7.x because that's 
> what we verified against.



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