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Fix Flaky test IndicesRequestCacheIT.testStaleKeysCleanupWithMultipleIndices #13453

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merged 2 commits into from
Apr 30, 2024
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Fix Flaky test IndicesRequestCacheIT.testStaleKeysCleanupWithMultipleIndices #13453

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d81d42a
Update IndicesRequestCacheIT.java
kiranprakash154 Apr 29, 2024
5b6926e
Update IndicesRequestCacheIT.java
kiranprakash154 Apr 29, 2024
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45 changes: 28 additions & 17 deletions server/src/internalClusterTest/java/org/opensearch/indices/IndicesRequestCacheIT.java
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Original file line number Diff line number Diff line change
Expand Up @@ -1119,6 +1119,10 @@ public void testCacheClearanceAfterIndexClosure() throws Exception {
String index = "index";
setupIndex(client, index);

// assert there are no entries in the cache for index
assertEquals(0, getRequestCacheStats(client, index).getMemorySizeInBytes());
// assert there are no entries in the cache from other indices in the node
assertEquals(0, getNodeCacheStats(client).getMemorySizeInBytes());
// create first cache entry in index
createCacheEntry(client, index, "hello");
assertCacheState(client, index, 0, 1);
Expand All @@ -1136,7 +1140,7 @@ public void testCacheClearanceAfterIndexClosure() throws Exception {
// sleep until cache cleaner would have cleaned up the stale key from index
assertBusy(() -> {
// cache cleaner should have cleaned up the stale keys from index
assertFalse(getNodeCacheStats(client).getMemorySizeInBytes() > 0);
assertEquals(0, getNodeCacheStats(client).getMemorySizeInBytes());
}, cacheCleanIntervalInMillis * 2, TimeUnit.MILLISECONDS);
}

Expand All @@ -1155,6 +1159,10 @@ public void testCacheCleanupAfterIndexDeletion() throws Exception {
String index = "index";
setupIndex(client, index);

// assert there are no entries in the cache for index
assertEquals(0, getRequestCacheStats(client, index).getMemorySizeInBytes());
// assert there are no entries in the cache from other indices in the node
assertEquals(0, getNodeCacheStats(client).getMemorySizeInBytes());
// create first cache entry in index
createCacheEntry(client, index, "hello");
assertCacheState(client, index, 0, 1);
Expand All @@ -1173,13 +1181,13 @@ public void testCacheCleanupAfterIndexDeletion() throws Exception {
// sleep until cache cleaner would have cleaned up the stale key from index
assertBusy(() -> {
// cache cleaner should have cleaned up the stale keys from index
assertFalse(getNodeCacheStats(client).getMemorySizeInBytes() > 0);
assertEquals(0, getNodeCacheStats(client).getMemorySizeInBytes());
}, cacheCleanIntervalInMillis * 2, TimeUnit.MILLISECONDS);
}

// when staleness threshold is lower than staleness, it should clean the cache from all indices having stale keys
public void testStaleKeysCleanupWithMultipleIndices() throws Exception {
int cacheCleanIntervalInMillis = 300;
int cacheCleanIntervalInMillis = 10;
String node = internalCluster().startNode(
Settings.builder()
.put(IndicesRequestCache.INDICES_REQUEST_CACHE_CLEANUP_STALENESS_THRESHOLD_SETTING_KEY, 0.10)
Expand All @@ -1194,37 +1202,40 @@ public void testStaleKeysCleanupWithMultipleIndices() throws Exception {
setupIndex(client, index1);
setupIndex(client, index2);

// assert cache is empty for index1
assertEquals(0, getRequestCacheStats(client, index1).getMemorySizeInBytes());
// create first cache entry in index1
createCacheEntry(client, index1, "hello");
assertCacheState(client, index1, 0, 1);
long memorySizeForIndex1 = getRequestCacheStats(client, index1).getMemorySizeInBytes();
assertTrue(memorySizeForIndex1 > 0);
long memorySizeForIndex1With1Entries = getRequestCacheStats(client, index1).getMemorySizeInBytes();
assertTrue(memorySizeForIndex1With1Entries > 0);

// create second cache entry in index1
createCacheEntry(client, index1, "there");
assertCacheState(client, index1, 0, 2);
long finalMemorySizeForIndex1 = getRequestCacheStats(client, index1).getMemorySizeInBytes();
assertTrue(finalMemorySizeForIndex1 > memorySizeForIndex1);
long memorySizeForIndex1With2Entries = getRequestCacheStats(client, index1).getMemorySizeInBytes();
assertTrue(memorySizeForIndex1With2Entries > memorySizeForIndex1With1Entries);

// assert cache is empty for index2
assertEquals(0, getRequestCacheStats(client, index2).getMemorySizeInBytes());
// create first cache entry in index2
createCacheEntry(client, index2, "hello");
assertCacheState(client, index2, 0, 1);
assertTrue(getRequestCacheStats(client, index2).getMemorySizeInBytes() > 0);

// force refresh index 1 so that it creates 2 stale keys
flushAndRefresh(index1);
// force refresh both index1 and index2
flushAndRefresh(index1, index2);
// create another cache entry in index 1, this should not be cleaned up.
createCacheEntry(client, index1, "hello");
// record the size of this entry
long memorySizeOfLatestEntryForIndex1 = getRequestCacheStats(client, index1).getMemorySizeInBytes() - finalMemorySizeForIndex1;
// force refresh index 2 so that it creates 1 stale key
flushAndRefresh(index2);
// sleep until cache cleaner would have cleaned up the stale key from index 2
// sleep until cache cleaner would have cleaned up the stale key from index2
assertBusy(() -> {
// cache cleaner should have cleaned up the stale key from index 2
// cache cleaner should have cleaned up the stale key from index2 and hence cache should be empty
assertEquals(0, getRequestCacheStats(client, index2).getMemorySizeInBytes());
// cache cleaner should have only cleaned up the stale entities
assertEquals(memorySizeOfLatestEntryForIndex1, getRequestCacheStats(client, index1).getMemorySizeInBytes());
// cache cleaner should have only cleaned up the stale entities for index1
long currentMemorySizeInBytesForIndex1 = getRequestCacheStats(client, index1).getMemorySizeInBytes();
assertTrue(currentMemorySizeInBytesForIndex1 < memorySizeForIndex1With2Entries);
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// cache for index1 should not be empty since there was an item cached after flushAndRefresh
assertTrue(currentMemorySizeInBytesForIndex1 > 0);
}, cacheCleanIntervalInMillis * 2, TimeUnit.MILLISECONDS);
}

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