marton-bod commented on a change in pull request #2261:
URL: https://github.com/apache/hive/pull/2261#discussion_r634500584
##########
File path:
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/Catalogs.java
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@@ -284,4 +334,42 @@ private static String getCatalogType(Configuration conf,
String catalogName) {
}
}
}
+
+ public static class TableCache {
+ private static final Cache<String, Table> tableCache =
Caffeine.newBuilder()
+ .expireAfterAccess(12, TimeUnit.HOURS).build();
+ private static final Logger LOG =
LoggerFactory.getLogger(TableCache.class);
+
+ public static void removeTables(Configuration conf) {
+ String queryId = conf.get(HiveConf.ConfVars.HIVEQUERYID.varname);
+ if (queryId != null && !queryId.isEmpty()) {
+ Set<String> queryKeys = tableCache.asMap().keySet().stream()
+ .filter(k -> k.startsWith(queryId)).collect(Collectors.toSet());
+ tableCache.invalidateAll(queryKeys);
+ } else {
+ LOG.warn("Query id is not present in config, therefore no Iceberg
table object is removed " +
Review comment:
I think what we do expect is that the `hive.query.id` is always
populated in the config. If it's absent, that's a warning sign and something
which could prevent us from evicting from the cache. This could be a useful log
line in case we see that the cache gets overly large and we're looking for the
root cause why the iceberg tables are not evicted.
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