danny0405 commented on a change in pull request #10620:
[FLINK-15239][table-planner-blink] TM Metaspace memory leak
URL: https://github.com/apache/flink/pull/10620#discussion_r361083233
##########
File path:
flink-table/flink-table-runtime-blink/src/main/java/org/apache/flink/table/runtime/generated/CompileUtils.java
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@@ -45,7 +48,7 @@
* number of Meta zone GC (class unloading), resulting in performance
bottlenecks. So we add
* a cache to avoid this problem.
*/
- protected static final Cache<Tuple2<ClassLoader, String>, Class<?>>
COMPILED_CACHE = CacheBuilder
+ protected static final Cache<String, Cache<ClassLoader, Class>>
COMPILED_CACHE = CacheBuilder
.newBuilder()
.maximumSize(100) // estimated cache size
Review comment:
Why not invoke `.softValues()` here instead of a new `Cache` value ?
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