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From "Alexey Goncharuk (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-2645) Assertion error in ATOMIC cachce for invokeAll and cache store
Date Fri, 12 Feb 2016 14:50:18 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-2645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15144652#comment-15144652
] 

Alexey Goncharuk commented on IGNITE-2645:
------------------------------------------

I think we can pass the generated update version to innerGet(), so that this version is used
for read-through. If read-through happened on innerGet(), but entry processor did not change
the value, we still need to propagate the updated value to backups.

> Assertion error in ATOMIC cachce for invokeAll and cache store
> --------------------------------------------------------------
>
>                 Key: IGNITE-2645
>                 URL: https://issues.apache.org/jira/browse/IGNITE-2645
>             Project: Ignite
>          Issue Type: Bug
>          Components: cache
>    Affects Versions: ignite-1.4
>            Reporter: Alexey Goncharuk
>         Attachments: EntryProcessorFails.java
>
>
> Assertion happens under the following conditions:
>  * Cache is empty
>  * Cache store contains non-null values for some keys
>  * invokeAll is invoked for those keys
> Update version is generated when update request reaches the primary node. Then, we need
to read-through stored values (the cache is empty) and pass them to transformers. Since read-through
changes entry version, subsequent update fails with an assertion because read-through version
is generated later than update version.
> The scenario when a read-through is implemented via a separate loop with innerGet() is
possible only with invokeAll() because this is the only multi-key cache operation that requires
the previous entry value.



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