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Posted to dev@qpid.apache.org by "Ken Giusti (Jira)" <ji...@apache.org> on 2019/09/06 12:20:00 UTC
[jira] [Commented] (DISPATCH-1406) Inter-router link stall on
receive client failover
[ https://issues.apache.org/jira/browse/DISPATCH-1406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16924200#comment-16924200 ]
Ken Giusti commented on DISPATCH-1406:
--------------------------------------
The root cause has been identified:
The problem occurs when a router's defaultTreatment is set to "unavailable", and a message traveling between routers (over the inter-router link) can no longer be forwarded (target address is removed from the routing table - think subscriber lost).
In this situation the router incorrectly avoids replenishing credit on the inter-router link, which causes eventual credit starvation (after linkCapacity is exhausted). The router never recovers credit in this situation and forwarding between the affected routers stalls.
> Inter-router link stall on receive client failover
> --------------------------------------------------
>
> Key: DISPATCH-1406
> URL: https://issues.apache.org/jira/browse/DISPATCH-1406
> Project: Qpid Dispatch
> Issue Type: Bug
> Components: Router Node
> Affects Versions: 1.7.0, 1.8.0
> Reporter: Ken Giusti
> Assignee: Ken Giusti
> Priority: Major
> Fix For: 1.9.0
>
>
> I have a test that simulates a receive client fail-over that results on an inter-router link "stalling" - no longer able to forward over the link. From what it appears there is 250 (inter-router link capacity) messages that are sent over the link but are not accounted for on the receiver end.
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