From a3f54566d498af75d71fc33dca359f18c7c84953 Mon Sep 17 00:00:00 2001
From: Siavash Sameni <manwe@MacBook-Air.local>
Date: Thu, 9 Apr 2026 09:50:30 +0400
Subject: [PATCH] fix: call nativeSignalConnect from 8MB Java Thread, not
 Dispatchers.IO

---
 .../java/com/wzp/ui/call/CallViewModel.kt     | 24 +++++++++++--------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/android/app/src/main/java/com/wzp/ui/call/CallViewModel.kt b/android/app/src/main/java/com/wzp/ui/call/CallViewModel.kt
index 220ab2f..75a7202 100644
--- a/android/app/src/main/java/com/wzp/ui/call/CallViewModel.kt
+++ b/android/app/src/main/java/com/wzp/ui/call/CallViewModel.kt
@@ -172,22 +172,26 @@ class CallViewModel : ViewModel(), WzpCallback {
         val seed = _seedHex.value
         val resolvedRelay = resolveToIp(relay) ?: relay
 
-        // nativeSignalConnect blocks up to 10s (waits for QUIC connect + register).
-        // Internal thread does the actual work; we just wait for the result.
-        viewModelScope.launch(kotlinx.coroutines.Dispatchers.IO) {
+        // nativeSignalConnect has JNI overhead — must be on a thread with enough stack.
+        // Dispatchers.IO threads overflow. Use explicit Java Thread.
+        Thread(null, {
             try {
                 val mgr = com.wzp.engine.SignalManager()
                 val ok = mgr.connect(resolvedRelay, seed)
-                if (ok) {
-                    signalManager = mgr
-                    startSignalPolling()
-                } else {
-                    _errorMessage.value = "Failed to register on relay"
+                viewModelScope.launch {
+                    if (ok) {
+                        signalManager = mgr
+                        startSignalPolling()
+                    } else {
+                        _errorMessage.value = "Failed to register on relay"
+                    }
                 }
             } catch (e: Exception) {
-                _errorMessage.value = "Register error: ${e.message}"
+                viewModelScope.launch {
+                    _errorMessage.value = "Register error: ${e.message}"
+                }
             }
-        }
+        }, "wzp-signal-init", 8 * 1024 * 1024).start()
     }
 
     /** Poll signal manager state every 500ms */