Rushabh Shah created PHOENIX-7113:
-------------------------------------
Summary: Create a feature flag for invoking
MDEI#invalidateServerMetadataCache
Key: PHOENIX-7113
URL: https://issues.apache.org/jira/browse/PHOENIX-7113
Project: Phoenix
Issue Type: Sub-task
Reporter: Rushabh Shah
During schema changes, we invoke
PhoenixRegionServerEndpoint#invalidateServerMetadataCache on all regionservers
to invalidate cache for the table which is undergoing schema changes.
To handle incompatibilitues during upgrade, we check if
PhoenixRegionServerEndpoint coproc is loaded or not. If it is not loaded on
SYSCAT regionserver, then we don't invalidate the cache but if it is loaded on
SYSCAT regionserver then we call this coproc method on all regionservers. But
it is possible that during upgrade if we upgrade the system regionservers first
then PhoenixRegionServerEndpoint is loaded on SYSCAT RS but not loaded on other
regionservers. This can cause failures during upgrade.
To avoid this, lets create a new conf property and once all the reginservers
are upgraded then set that to true.
{code}
String value = conf.get(REGIONSERVER_COPROCESSOR_CONF_KEY);
if (value == null
||
!value.contains(PhoenixRegionServerEndpoint.class.getName())) {
// PhoenixRegionServerEndpoint is not loaded. We don't have to
invalidate the cache.
LOGGER.info("Skip invalidating server metadata cache since
PhoenixRegionServerEndpoint"
+ " is not loaded");
return;
}
{code}
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