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Patch tokenizer race condition bug #4091

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Merged
merged 2 commits into from
Jul 7, 2025
+22 βˆ’6
Merged

Patch tokenizer race condition bug #4091

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b0e66e7
patch tokenizer race condition bug
shatfield4 Jul 2, 2025
7871a41
Merge branch 'master' into 4032-bug-typeerror-tokenizer-is-not-a-func…
timothycarambat Jul 7, 2025
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28 changes: 22 additions & 6 deletions server/utils/EmbeddingRerankers/native/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@ class NativeEmbeddingReranker {
static #model = null;
static #tokenizer = null;
static #transformers = null;
static #initializationPromise = null;

// This is a folder that Mintplex Labs hosts for those who cannot capture the HF model download
// endpoint for various reasons. This endpoint is not guaranteed to be active or maintained
Expand Down Expand Up @@ -71,13 +72,25 @@ class NativeEmbeddingReranker {
}

async initClient() {
if (NativeEmbeddingReranker.#transformers) {
this.log(`Reranker suite already initialized - reusing.`);
if (
NativeEmbeddingReranker.#transformers &&
NativeEmbeddingReranker.#model &&
NativeEmbeddingReranker.#tokenizer
) {
this.log(`Reranker suite already fully initialized - reusing.`);
return;
}

await import("@xenova/transformers").then(
async ({ AutoModelForSequenceClassification, AutoTokenizer, env }) => {
if (NativeEmbeddingReranker.#initializationPromise) {
this.log(`Waiting for existing initialization to complete...`);
await NativeEmbeddingReranker.#initializationPromise;
return;
}

NativeEmbeddingReranker.#initializationPromise = (async () => {
try {
const { AutoModelForSequenceClassification, AutoTokenizer, env } =
await import("@xenova/transformers");
this.log(`Loading reranker suite...`);
NativeEmbeddingReranker.#transformers = {
AutoModelForSequenceClassification,
Expand All @@ -90,9 +103,12 @@ class NativeEmbeddingReranker {
// 3. Download and cache from fallback host (cdn.anythingllm.com)
await this.#getPreTrainedModel();
await this.#getPreTrainedTokenizer();
} finally {
NativeEmbeddingReranker.#initializationPromise = null;
}
);
return;
})();

await NativeEmbeddingReranker.#initializationPromise;
}

/**
Expand Down