Github user kkhatua commented on a diff in the pull request:
https://github.com/apache/drill/pull/827#discussion_r115548554
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/store/sys/store/EphemeralPersistentStore.java
---
@@ -93,6 +107,14 @@ public void put(final String key, final V value, final
DataChangeVersion dataCha
throw new VersionMismatchException("Version mismatch detected",
dataChangeVersion.getVersion());
}
store.put(key, value);
+ currentSize.incrementAndGet();
+
+ if (currentSize.get() > maxCapacity) {
+ //Pop Out Oldest
+ ((ConcurrentSkipListMap<String, V>) store).pollLastEntry();
--- End diff --
The natural ordering of the profiles actually has the 'smallest' key being
the latest. Hence, we pop out the oldest entry by getting the 'largest'/last
entry
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