[
https://issues.apache.org/jira/browse/HIVE-25900?focusedWorklogId=717780&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-717780
]
ASF GitHub Bot logged work on HIVE-25900:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 31/Jan/22 07:15
Start Date: 31/Jan/22 07:15
Worklog Time Spent: 10m
Work Description: kasakrisz commented on a change in pull request #2984:
URL: https://github.com/apache/hive/pull/2984#discussion_r795393121
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/metadata/HiveMaterializedViewsRegistry.java
##########
@@ -139,109 +200,262 @@ public void init() {
}
}
- public void init(Hive db) {
+ private static void init(Hive db) {
final boolean dummy =
db.getConf().get(HiveConf.ConfVars.HIVE_SERVER2_MATERIALIZED_VIEWS_REGISTRY_IMPL.varname)
.equals("DUMMY");
if (dummy) {
// Dummy registry does not cache information and forwards all requests
to metastore
- initialized.set(true);
+ SINGLETON = new MaterializedViewsRegistry() {};
LOG.info("Using dummy materialized views registry");
} else {
+ SINGLETON = new
InMemoryMaterializedViewsRegistry(HiveMaterializedViewsRegistry::createMaterialization);
// We initialize the cache
long period = HiveConf.getTimeVar(db.getConf(),
ConfVars.HIVE_SERVER2_MATERIALIZED_VIEWS_REGISTRY_REFRESH, TimeUnit.SECONDS);
+ if (period <= 0) {
+ return;
+ }
+
ScheduledExecutorService pool =
Executors.newSingleThreadScheduledExecutor(
new ThreadFactoryBuilder()
.setDaemon(true)
.setNameFormat("HiveMaterializedViewsRegistry-%d")
.build());
- pool.scheduleAtFixedRate(new Loader(db), 0, period, TimeUnit.SECONDS);
+
+ MaterializedViewObjects objects =
db::getAllMaterializedViewObjectsForRewriting;
+ pool.scheduleAtFixedRate(new Loader(db.getConf(), SINGLETON, objects),
0, period, TimeUnit.SECONDS);
}
}
- private class Loader implements Runnable {
- private final Hive db;
+ public interface MaterializedViewObjects {
+ List<Table> getAllMaterializedViewObjectsForRewriting() throws
HiveException;
+ }
- private Loader(Hive db) {
- this.db = db;
+ public static class Loader implements Runnable {
Review comment:
Changed to package private.
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Issue Time Tracking
-------------------
Worklog Id: (was: 717780)
Time Spent: 1.5h (was: 1h 20m)
> Materialized view registry does not clean non existing views at refresh
> -----------------------------------------------------------------------
>
> Key: HIVE-25900
> URL: https://issues.apache.org/jira/browse/HIVE-25900
> Project: Hive
> Issue Type: Bug
> Components: Materialized views
> Reporter: Krisztian Kasa
> Assignee: Krisztian Kasa
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> CBO plans of materialized views which are enabled for query rewrite are
> cached in HS2 (MaterializedViewsCache, HiveMaterializedViewsRegistry)
> The registry is refreshed periodically from HMS:
> {code:java}
> set hive.server2.materializedviews.registry.refresh.period=1500s;
> {code}
> This functionality is required when multiple HS2 instances are used in a
> cluster: MV drop operation is served by one of the HS2 instances and the
> registry is updated at that time in that instance. However other HS2
> instances still cache the non-existent view and need to be refreshed by the
> updater thread.
> Currently the updater thread adds new entries, refresh existing ones but does
> not remove the outdated entries.
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