{"record":{"id":"5c1a0623adcc7468","repo":"router-for-me/CLIProxyAPI","slug":"allocate-plugin-response-buffer","errorCode":null,"errorMessage":"allocate plugin response buffer","messagePattern":"allocate plugin response buffer","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/pluginhost/loader_windows.go","lineNumber":280,"sourceCode":"\t\t}\n\t}\n\tmethodBytes, errMethod := syscall.BytePtrFromString(method)\n\tif errMethod != nil {\n\t\treturn nil, errMethod\n\t}\n\tvar requestPtr uintptr\n\tif len(request) > 0 {\n\t\trequestPtr = uintptr(unsafe.Pointer(&request[0]))\n\t}\n\tresponseMem, errAlloc := windows.LocalAlloc(\n\t\twindows.LMEM_FIXED|windows.LMEM_ZEROINIT,\n\t\tuint32(unsafe.Sizeof(windowsBuffer{})),\n\t)\n\tif errAlloc != nil {\n\t\treturn nil, fmt.Errorf(\"allocate plugin response buffer: %w\", errAlloc)\n\t}\n\tif responseMem == 0 {\n\t\treturn nil, fmt.Errorf(\"allocate plugin response buffer\")\n\t}\n\tdefer func() {\n\t\t_, _ = windows.LocalFree(windows.Handle(responseMem))\n\t}()\n\tresponse := (*windowsBuffer)(unsafe.Pointer(responseMem))\n\trc, _, _ := syscall.SyscallN(\n\t\tc.api.call,\n\t\tuintptr(unsafe.Pointer(methodBytes)),\n\t\trequestPtr,\n\t\tuintptr(len(request)),\n\t\tresponseMem,\n\t)\n\tvar out []byte\n\tif response.ptr != 0 && response.len > 0 {\n\t\tout = unsafe.Slice((*byte)(unsafe.Pointer(response.ptr)), response.len)\n\t\tout = append([]byte(nil), out...)\n\t}\n\tif response.ptr != 0 {","sourceCodeStart":262,"sourceCodeEnd":298,"githubUrl":"https://github.com/router-for-me/CLIProxyAPI/blob/78f0c4079e3e6273d65d03b5549cffc898703264/internal/pluginhost/loader_windows.go#L262-L298","documentation":"LocalAlloc for the plugin response buffer returned NULL without setting a retrievable error (errAlloc == nil but responseMem == 0). Functionally identical to error 569: the host could not allocate the small fixed-size response struct, so the plugin call is abandoned before it starts.","triggerScenarios":"Severe memory exhaustion where LocalAlloc returns NULL; corrupted heap in the host process; extremely constrained sandboxed environments.","commonSituations":"Long-running process degradation; memory leaks elsewhere in the process; system commit limit reached.","solutions":["Restart the process to restore a healthy heap, then investigate what exhausted memory","Profile or monitor RSS of the server; cap plugin concurrency","If recurring, capture a memory dump at failure time"],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"if err != nil && strings.Contains(err.Error(), \"allocate plugin response buffer\") {\n    err = retryOnce(client.Call, ctx, method, body)\n}","preventionTips":["Investigate memory leaks if this recurs — a NULL LocalAlloc signals heap/commit exhaustion","Bound plugin concurrency"],"tags":["plugin","windows","memory","allocation"],"backgroundTag":null,"analyzedSha":"78f0c4079e3e6273d65d03b5549cffc898703264","analyzedAt":"2026-08-15T12:26:37.444Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}