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Posted to dev@tephra.apache.org by "Poorna Chandra (JIRA)" <ji...@apache.org> on 2018/05/01 23:53:00 UTC
[jira] [Resolved] (TEPHRA-270) Avoid transaction state cache
refresh on co-procesor startup
[ https://issues.apache.org/jira/browse/TEPHRA-270?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Poorna Chandra resolved TEPHRA-270.
-----------------------------------
Resolution: Fixed
> Avoid transaction state cache refresh on co-procesor startup
> ------------------------------------------------------------
>
> Key: TEPHRA-270
> URL: https://issues.apache.org/jira/browse/TEPHRA-270
> Project: Tephra
> Issue Type: Improvement
> Components: core
> Reporter: Poorna Chandra
> Assignee: Poorna Chandra
> Priority: Major
> Fix For: 0.14.0-incubating
>
>
> Transaction state cache, on startup, refreshes the transaction snapshot from HDFS. The transaction state cache startup is called during HBase co-processor startup. The refresh of the transaction snapshot can block, thus blocking the co-processor startup.
> The subsequent transaction snapshot refreshes happen in the background. Also - there is no guarantee that a snapshot will be present during the refresh on startup. Hence it is okay not to refresh the snapshot during snapshot, but do it in background.
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