Add file extension metadata to cache miss counter from SharedBlobCacheService #134374
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tteofili
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…search into cachemiss_metric_filext
andreidan
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Sep 15, 2025
...ugin/blob-cache/src/main/java/org/elasticsearch/blobcache/shared/SharedBlobCacheService.java
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| @Nullable | ||
| public static boolean isLuceneExtension(String ext) { | ||
| return extensions.containsKey(ext); |
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nit: this is not nullable
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if I'm not mistaken, IndexFileNames#getExtension might return null in case the fileName doesn't contain a ., that's why I had put the @Nullable annotation.
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Oh yes. I see what you mean.
We should @Nullable the ext method parameter ++
Being on the method it indicates the method can return null.
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...ugin/blob-cache/src/main/java/org/elasticsearch/blobcache/shared/SharedBlobCacheService.java
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| return LuceneFilesExtensions.CFS.getExtension(); | ||
| } | ||
| try { | ||
| String extension = IndexFileNames.getExtension(resourceDescription); |
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extension can be null here
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this is considered in the if statement
if (LuceneFilesExtensions.isLuceneExtension(extension)) ...
so a null here will result in other extension.
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...ugin/blob-cache/src/main/java/org/elasticsearch/blobcache/shared/SharedBlobCacheService.java
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* upstream/main: Add additional logging to make spotting stats issues easier (elastic#133972) [ESQL] Clean up ESQL enrich landing page (elastic#134820) ES|QL: Make kibana docs for Query settings more consistent (elastic#134881) Add file extension metadata to cache miss counter from SharedBlobCacheService (elastic#134374) Add IT for num_reduced_phases with batched query execution (elastic#134312) Remove `SizeValue` (elastic#134871)
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This adds file extension metadata to cache miss counter when that's updated by
SharedBlobCacheService.In particular this updates the
es.blob_cache.miss_that_triggered_read.totalcounter with file extensions.At the moment, we don't introspect into compound files, we might do it or not in the future.