diff --git a/sdk-bugcollect/src/main/java/com/xuqm/sdk/bugcollect/BugCollect.kt b/sdk-bugcollect/src/main/java/com/xuqm/sdk/bugcollect/BugCollect.kt
index 811b3e3..13ba96a 100644
--- a/sdk-bugcollect/src/main/java/com/xuqm/sdk/bugcollect/BugCollect.kt
+++ b/sdk-bugcollect/src/main/java/com/xuqm/sdk/bugcollect/BugCollect.kt
@@ -154,6 +154,7 @@ object BugCollect {
         if (crashCaptureStarted) return
         if (!XuqmSDK.isInitialized()) return
         crashCaptureStarted = true
+        android.util.Log.w("BugCollect", "startCrashCapture: registering crash handler")
         CrashCapture.start(
             appContext = XuqmSDK.appContext,
             appKey = XuqmSDK.appKey,
diff --git a/sdk-bugcollect/src/main/java/com/xuqm/sdk/bugcollect/internal/LogUploader.kt b/sdk-bugcollect/src/main/java/com/xuqm/sdk/bugcollect/internal/LogUploader.kt
index b647c75..9c98320 100644
--- a/sdk-bugcollect/src/main/java/com/xuqm/sdk/bugcollect/internal/LogUploader.kt
+++ b/sdk-bugcollect/src/main/java/com/xuqm/sdk/bugcollect/internal/LogUploader.kt
@@ -38,7 +38,7 @@ internal object LogUploader {
     fun uploadIssues(logApiUrl: String, issues: List<IssueEvent>) {
         if (issues.isEmpty()) return
         val url = "${resolveUrl(logApiUrl)}/bugcollect/v1/issues/batch"
-        Log.w(TAG, "uploadIssues: url=$url, count=${issues.size}")
+        Log.w(TAG, "uploadIssues: url=$url, count=${issues.size}, thread=${Thread.currentThread().name}")
         val envelope = createEnvelope()
         val events = JSONArray()
         for (issue in issues) {
@@ -79,14 +79,17 @@ internal object LogUploader {
     }
 
     private fun post(url: String, body: String) {
+        android.util.Log.w(TAG, "POST_START url=$url bodyLen=${body.length}")
         val request = Request.Builder()
             .url(url)
             .post(body.toRequestBody(JSON_MEDIA))
             .build()
-        client.newCall(request).execute().use { response ->
-            if (!response.isSuccessful) {
-                Log.w(TAG, "Upload failed: HTTP ${response.code} url=$url")
-            }
+        try {
+            val response = client.newCall(request).execute()
+            android.util.Log.w(TAG, "POST_DONE code=${response.code} url=$url")
+            response.close()
+        } catch (e: Exception) {
+            android.util.Log.e(TAG, "POST_FAIL url=$url", e)
         }
     }