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https://issues.apache.org/jira/browse/TEPHRA-270?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Poorna Chandra updated TEPHRA-270:
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Description:
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.
was:
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.
> 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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