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https://issues.apache.org/jira/browse/IGNITE-7156?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andrey Kornev updated IGNITE-7156:
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Description:
This line in GridNearGetFuture:
{{boolean allowLocRead = !forcePrimary ||
cctx.localNode().equals(affNodes.get(0));}} [(github
link)|https://github.com/apache/ignite/blob/1e8b5501ee9fde61f979c104b4d271a1a458eb1d/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/distributed/near/GridNearGetFuture.java#L434]
effectively disables Near Cache if "read from backup" is not enabled in the
cache config and the local node is not the primary node. Disabling backup reads
should not affect near cache usage.
If this is by design (which would be unfortunate), then the javadocs of
{{CacheConfiguration.setReadFromBackup(boolean)}} should be updated to reflect
the behavior.
was:
This line in GridNearGetFuture:
{{boolean allowLocRead = !forcePrimary ||
cctx.localNode().equals(affNodes.get(0));}} [(github
link)|https://github.com/apache/ignite/blob/1e8b5501ee9fde61f979c104b4d271a1a458eb1d/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/distributed/near/GridNearGetFuture.java#L434]
effectively disables Near Cache if "read from backup" is not enabled in the
cache config and the local node is not one of the affinity nodes. Disabling
backup reads should not affect near cache usage.
If this is by design (which would be unfortunate), then the javadocs of
{{CacheConfiguration.setReadFromBackup(boolean)}} should be updated to reflect
the behavior.
> Disabling readFromBackup for a cache effectively disables near cache on
> non-affinity nodes
> ------------------------------------------------------------------------------------------
>
> Key: IGNITE-7156
> URL: https://issues.apache.org/jira/browse/IGNITE-7156
> Project: Ignite
> Issue Type: Bug
> Components: cache
> Affects Versions: 2.3
> Reporter: Andrey Kornev
>
> This line in GridNearGetFuture:
> {{boolean allowLocRead = !forcePrimary ||
> cctx.localNode().equals(affNodes.get(0));}} [(github
> link)|https://github.com/apache/ignite/blob/1e8b5501ee9fde61f979c104b4d271a1a458eb1d/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/distributed/near/GridNearGetFuture.java#L434]
> effectively disables Near Cache if "read from backup" is not enabled in the
> cache config and the local node is not the primary node. Disabling backup
> reads should not affect near cache usage.
> If this is by design (which would be unfortunate), then the javadocs of
> {{CacheConfiguration.setReadFromBackup(boolean)}} should be updated to
> reflect the behavior.
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