diff --git a/src/main/kotlin/OneDriveTransferCenter.kt b/src/main/kotlin/OneDriveTransferCenter.kt
index f9e7d03..3bdb775 100644
--- a/src/main/kotlin/OneDriveTransferCenter.kt
+++ b/src/main/kotlin/OneDriveTransferCenter.kt
@@ -29,11 +29,9 @@ import java.util.concurrent.*
 object OneDriveTransferCenter {
 
     val executor =
-        OneDriveTransferTaskExecutor(1, DefaultOneDriveTransferCallback, ArrayBlockingQueue(100))
+        OneDriveTransferTaskExecutor(1, DefaultOneDriveTransferCallback, ArrayBlockingQueue(Integer.MAX_VALUE))
 
-    fun submitUploadTask(task: OneDriveTransferTask) {
-        executor.submitTransferTask(task)
-    }
+    fun submitUploadTask(task: OneDriveTransferTask): Boolean = executor.submitTransferTask(task)
 
     fun cancelUploadTask(task: OneDriveTransferTask): Boolean = executor.cancelTransferTask(task)
 
@@ -291,9 +289,12 @@ class OneDriveTransferTaskExecutor(
         }
     }
 
-    fun submitTransferTask(task: OneDriveTransferTask) {
-        callback.onTransferTaskCreated(task)
-        taskQueue.offer(task)
+    fun submitTransferTask(task: OneDriveTransferTask): Boolean {
+        if (taskQueue.remainingCapacity() > 0) {
+            callback.onTransferTaskCreated(task)
+            return taskQueue.offer(task)
+        }
+        return false
     }
 
     fun cancelTransferTask(task: OneDriveTransferTask): Boolean {
@@ -348,9 +349,13 @@ class OneDriveTransferTaskExecutor(
                 }
                 logger.warn(e) { "OneDrive 中转任务执行失败: ${e.message}" }
                 progress.status = OneDriveTransferStatus.FAILURE
-                callback.onTransferFailure(task, progress.apply {
-                    this.exception = e
-                })
+                try {
+                    callback.onTransferFailure(task, progress.apply {
+                        this.exception = e
+                    })
+                } catch (e: Exception) {
+                    logger.warn(e) { "OneDrive 中转任务失败回调失败: ${e.message}" }
+                }
             } finally {
                 logger.info { "线程 $id 任务执行完毕: ${task.document.fileName}" }
                 threadStatusMap.remove(id)
diff --git a/src/main/kotlin/Services.kt b/src/main/kotlin/Services.kt
index 3a52fbc..37ea8fa 100644
--- a/src/main/kotlin/Services.kt
+++ b/src/main/kotlin/Services.kt
@@ -109,19 +109,21 @@ class OneDriveTransferService(
     fun submitUploadDocumentTask(userId: Long, messageId: Int, document: Document) {
         val transferSetting =
             accountManager.getTransferSetting(userId) ?: throw OneDriveNotLoginException()
-        OneDriveTransferCenter.submitUploadTask(
-            OneDriveTransferTask(
-                userId,
-                bot,
-                this,
-                document,
-                transferSetting.driveId,
-                transferSetting.storagePath,
-            ).apply {
-                extra["chatId"] = userId
-                extra["messageId"] = messageId
-            }.also { tasks.add(it) }
-        )
+        val task = OneDriveTransferTask(
+            userId,
+            bot,
+            this,
+            document,
+            transferSetting.driveId,
+            transferSetting.storagePath,
+        ).apply {
+            extra["chatId"] = userId
+            extra["messageId"] = messageId
+        }
+        val submitted = OneDriveTransferCenter.submitUploadTask(task)
+        if (submitted) {
+            tasks.add(task)
+        }
     }
 
     fun cancelTask(userId: Long, replyMessageId: Int): Boolean {