[infinispan-issues] [JBoss JIRA] (ISPN-7051) Intermittent RpcException during PUTs and GETs when topology changes

[Radim Vansa (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-7051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13298895#comment-13298895 ] 

Radim Vansa edited comment on ISPN-7051 at 9/27/16 6:57 AM:
------------------------------------------------------------

So, what happens:
1. C does a staggered get to B, A (current topologyId=4)
2. B responds first with SuccessfulResponse\{null\} - I am not sure why it does not have the value if it's an owner according to readCH
3. A responds second with actual value, but the delayed response is ignored
4. C retries to find the entry, routing accoring to pendingCH - and the owner there is C
5. C sends the command to itself, but as local node is filtered out in JGroupsTransport, it returns empty response map

A correct solution should involve a check if the actual owners - self isn't empty (or even better, forcing to send remote commands with remote recipients only), but the logic is changed in https://github.com/infinispan/infinispan/pull/4564 so I am not sure if we should invest more into this, rather than do a review & merge on the above mentioned PR.


was (Author: rvansa):
So, what happens:
1. C does a staggered get to B, A (current topologyId=4)
2. B responds first with SuccessfulResponse{null} - I am not sure why it does not have the value if it's an owner according to readCH
3. A responds second with actual value, but the delayed response is ignored
4. C retries to find the entry, routing accoring to pendingCH - and the owner there is C
5. C sends the command to itself, but as local node is filtered out in JGroupsTransport, it returns empty response map

A correct solution should involve a check if the actual owners - self isn't empty (or even better, forcing to send remote commands with remote recipients only), but the logic is changed in https://github.com/infinispan/infinispan/pull/4564 so I am not sure if we should invest more into this, rather than do a review & merge on the above mentioned PR.

> Intermittent RpcException during PUTs and GETs when topology changes
> --------------------------------------------------------------------
>
>                 Key: ISPN-7051
>                 URL: https://issues.jboss.org/browse/ISPN-7051
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Core
>            Reporter: Gustavo Fernandes
>            Priority: Critical
>         Attachments: trace-jgroups.tgz.part-00, trace-jgroups.tgz.part-01, trace-jgroups.tgz.part-02, trace-jgroups.tgz.part-03, trace-jgroups.tgz.part-04, trace.tgz
>
>
> The commit https://github.com/infinispan/infinispan/commit/6ae4e2e7707285287ef753661943a5623d8eb271 seems to be introducing intermittent errors during gets and puts under topology changes



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