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Fix WebGPU device destroyed on session release, breaking session recreation #27634

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Fix WebGPU device destroyed on session release, breaking session recreation #27634

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e2084c8
fixed webgpu device destroyed on session release
nico-martin Mar 12, 2026
eddb599
Merge branch 'main' into fix/create-webgpu-device-after-release
nico-martin Mar 12, 2026
cbd49fa
simplify fix
nico-martin Mar 12, 2026
507c5d0
fixed Web CI Pipeline / precheck
nico-martin Mar 12, 2026
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10 changes: 9 additions & 1 deletion js/web/lib/wasm/jsep/backend-webgpu.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -278,7 +278,7 @@ export class WebGpuBackend {
value: this.device,
writable: false,
enumerable: true,
configurable: false,
configurable: true, // Allow deletion when device is destroyed
});
Object.defineProperty(this.env.webgpu, 'adapter', {
value: adapter,
Expand All @@ -296,6 +296,14 @@ export class WebGpuBackend {
this.querySet.destroy();
}
this.gpuDataManager.dispose();

// Clear the device reference when it's lost to allow new sessions to create a fresh device
// This handles the case where preserve_device=false (default) causes the C++ side to destroy the device
if (this.device && this.env?.webgpu) {
void this.device.lost.then(() => {
delete (this.env.webgpu as unknown as Record<string, unknown>).device;
});
}
}

getCommandEncoder(): GPUCommandEncoder {
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