Enhancements to IndicesQueryCache. (#39099) #40445
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This commit adds the following: - more tests to IndicesServiceCloseTests, one of them found a bug in the order in which `IndicesQueryCache#onClose` and `IndicesService.indicesRefCount#decRef` are called. - made `IndicesQueryCache.stats2` a synchronized map. All writes to it are already protected by the lock of the Lucene cache, but the final read from an assertion in `IndicesQueryCache#close()` was not so this change should avoid any potential visibility issues. - human-readable `toString`s to make debugging easier. Relates elastic#37117
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This commit adds the following:
in which
IndicesQueryCache#onCloseandIndicesService.indicesRefCount#decRefare called.IndicesQueryCache.stats2a synchronized map. All writes to it arealready protected by the lock of the Lucene cache, but the final read from
an assertion in
IndicesQueryCache#close()was not so this change shouldavoid any potential visibility issues.
toStrings to make debugging easier.Relates #37117