litellm/tests/unit/caching
devin-ai-integration[bot] 41890bdf64
fix(token_counter): stop re-downloading a HuggingFace tokenizer after a failed download (#47586)
* fix(token_counter): stop re-downloading a HuggingFace tokenizer after a failed download

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* test(tokenizer): isolate HuggingFace tokenizer caches

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* fix(token_counter): clear the traceback before re-raising a cached tokenizer load error

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* fix(token_counter): retry failed HuggingFace tokenizer loads after the cache window

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* fix(token_counter): start tokenizer retry TTL after a failure

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* fix(utils): lock every HuggingFace tokenizer load and keep load failures as values

Concurrent llama-2, llama-3 and cohere counts each started their own failed
download because only the bundled tokenizers took a load lock. Every tokenizer
kind now has one, so a burst during an outage makes a single attempt and two
counts can no longer read the same expiring entry at once.

A failed load is now remembered as a small value with the error message
instead of the error object, so re-raising it no longer keeps the first
failing request's frames alive. Adds tests for the concurrent outage and for
fork-guard errors staying raised and unremembered.

* fix(utils): keep Hugging Face tokenizer downloads unlocked and warn once per failed download

Reverts the per-kind load lock so concurrent first downloads still run in parallel, as #47353 intends. A short lock around the failure cache read and write stops two counts racing on an expiring entry, and the tiktoken fallback warning now fires only when a download fails, not on every count that reuses the remembered failure.

* fix(caching): read an entry another reader just expired as a cache miss

Two threads reading the same expiring key in InMemoryCache could both pass the membership check, and the second then raised KeyError after the first removed it. get_cache now treats that key as a miss. This replaces the extra lock the tokenizer failure cache took, and the regression test forces the interleaving without timing.

* fix(caching): treat a TTL another reader just removed as not expired

InMemoryCache's expiry check read the TTL after a separate membership check, so a reader racing another reader's eviction raised KeyError. It now reads the TTL once and treats a missing one as not expired, and get_cache already reads the vanished entry as a miss.

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: mateo-berri <277851410+mateo-berri@users.noreply.github.com>
2026-10-20 18:24:22 -07:00
..
__init__.py ci: move caching, proxy-extras, gateway and enterprise tests into tests/unit and run them from litellm-tests (#42902) 2026-09-24 15:49:59 -07:00
test_azure_blob_cache.py test: move tests/test_litellm core utils, routing, responses, caching and rust_bridge into tests/unit (#43199) 2026-09-25 17:10:13 -07:00
test_cache_preset_key.py ci: move caching, proxy-extras, gateway and enterprise tests into tests/unit and run them from litellm-tests (#42902) 2026-09-24 15:49:59 -07:00
test_caching.py feat(gemini): allow disabling thought summaries while keeping thinking on (#36460) 2026-10-16 09:01:33 +00:00
test_caching_handler.py test(caching): assert sync cache-hit logging without depending on thread order (#47093) 2026-10-17 14:00:03 -07:00
test_check_and_fix_namespace_none_guard.py test: move tests/test_litellm core utils, routing, responses, caching and rust_bridge into tests/unit (#43199) 2026-09-25 17:10:13 -07:00
test_disk_cache.py test: migrate legacy unit dirs and unrun folders into tests/unit, tests/integration and tests/e2e (#45940) 2026-10-11 06:24:57 -07:00
test_dual_cache.py fix(caching): make Redis Cluster commands wait for a pool slot instead of tripping the circuit breaker (#46488) 2026-10-14 15:27:00 -07:00
test_embedding_router.py test: move tests/test_litellm core utils, routing, responses, caching and rust_bridge into tests/unit (#43199) 2026-09-25 17:10:13 -07:00
test_evicted_client_closer.py test: move tests/test_litellm core utils, routing, responses, caching and rust_bridge into tests/unit (#43199) 2026-09-25 17:10:13 -07:00
test_gcs_cache.py test: migrate legacy unit dirs and unrun folders into tests/unit, tests/integration and tests/e2e (#45940) 2026-10-11 06:24:57 -07:00
test_in_memory_cache.py fix(token_counter): stop re-downloading a HuggingFace tokenizer after a failed download (#47586) 2026-10-20 18:24:22 -07:00
test_llm_caching_handler.py refactor(llms): expose public names for private provider helpers (#45037) 2026-10-07 08:49:25 -07:00
test_llm_client_cache_e2e.py test: move tests/test_litellm core utils, routing, responses, caching and rust_bridge into tests/unit (#43199) 2026-09-25 17:10:13 -07:00
test_qdrant_semantic_cache.py refactor(llms): expose public names for private provider helpers (#45037) 2026-10-07 08:49:25 -07:00
test_redis_batch.py fix(otel): nest cache spans under their operation and name service spans by purpose (#44150) 2026-10-03 09:20:27 -07:00
test_redis_cache.py test(caching): baseline breaker metrics from live state after gc (#46652) 2026-10-15 05:53:30 -07:00
test_redis_cluster_cache.py fix(caching): make Redis Cluster commands wait for a pool slot instead of tripping the circuit breaker (#46488) 2026-10-14 15:27:00 -07:00
test_redis_cluster_node_isolation.py test: move tests/test_litellm core utils, routing, responses, caching and rust_bridge into tests/unit (#43199) 2026-09-25 17:10:13 -07:00
test_redis_connection_pool.py test: move tests/test_litellm core utils, routing, responses, caching and rust_bridge into tests/unit (#43199) 2026-09-25 17:10:13 -07:00
test_redis_semantic_cache.py fix(caching): skip the cache past max_messages and keep tool_result text in semantic prompts (#43878) 2026-10-07 17:32:39 +00:00
test_request_redis_batch_post_call.py fix(proxy)!: stop update_cache from resurrecting evicted auth cache entries (#46997) 2026-10-20 17:09:53 +00:00
test_request_redis_batch_pre_call.py fix: cap cold MCP schema workers at usable CPUs and deflake wall-clock unit tests (#45791) 2026-10-15 00:47:59 -07:00
test_responses_stream_cache_keys.py refactor: expose core private helpers under public names (#44871) 2026-10-07 00:05:27 +00:00
test_s3_cache.py test: move routing, caching and callback tests out of local_testing (#45761) 2026-10-10 09:33:09 -07:00
test_unit_test_caching.py refactor: expose core private helpers under public names (#44871) 2026-10-07 00:05:27 +00:00
test_valkey_semantic_cache.py test: move tests/test_litellm core utils, routing, responses, caching and rust_bridge into tests/unit (#43199) 2026-09-25 17:10:13 -07:00