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Posted to issues@ignite.apache.org by "Alexey Stelmak (JIRA)" <ji...@apache.org> on 2018/10/29 15:08:25 UTC
[jira] [Commented] (IGNITE-10045) Add fail-fast mode to bounded
iteration of StandaloneWalRecordsIterator
[ https://issues.apache.org/jira/browse/IGNITE-10045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16667329#comment-16667329 ]
Alexey Stelmak commented on IGNITE-10045:
-----------------------------------------
PR: https://github.com/apache/ignite/pull/5199
> Add fail-fast mode to bounded iteration of StandaloneWalRecordsIterator
> -----------------------------------------------------------------------
>
> Key: IGNITE-10045
> URL: https://issues.apache.org/jira/browse/IGNITE-10045
> Project: Ignite
> Issue Type: Improvement
> Reporter: Ivan Rakov
> Assignee: Alexey Stelmak
> Priority: Major
> Fix For: 2.8
>
>
> Since IGNITE-9294 StandaloneWalRecordsIterator supports bounded iteration. That means we can specify "from" and "to" WAL pointers and iterator will return records only between given bounds.
> The problem is that in current implementation StandaloneWalRecordsIterator just skips segments if they are missing. For example: if we'll specify fromIdx=0, toIdx = 10 and segments with indexes=[9, 10] will be missing, we'll just silently finish iteration on idx=8.
> To prevent that, we should be able to switch on fail-fast mode, in which StandaloneWalRecordsIterator will throw error unless iteration is really started from left bound and ended on right bound.
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