diff --git a/docker-compose.yml b/docker-compose.yml
index 66c1ba8..7ad6570 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,10 +3,27 @@ services:
   mongo:
     image: mongo:6
     restart: unless-stopped
+    command: ["--replSet", "rs0", "--bind_ip_all"]
     ports:
       - "27017:27017"
     volumes:
       - mongo_data:/data/db
+    healthcheck:
+      test: ["CMD", "mongosh", "--eval", "db.adminCommand('ping')"]
+      interval: 10s
+      timeout: 10s
+      retries: 5
+      start_period: 30s
+
+  mongo-init:
+    image: mongo:6
+    depends_on:
+      mongo:
+        condition: service_healthy
+    entrypoint: >
+      mongosh --host mongo:27017 --eval
+      'try { rs.status(); print("already initiated") } catch(e) { rs.initiate({_id:"rs0",members:[{_id:0,host:"localhost:27017"}]}); print("initiated") }'
+    restart: "no"
 
   redis:
     image: redis:alpine
diff --git a/src/modules/outbox/outbox-watcher.service.ts b/src/modules/outbox/outbox-watcher.service.ts
index d5c9217..a575626 100644
--- a/src/modules/outbox/outbox-watcher.service.ts
+++ b/src/modules/outbox/outbox-watcher.service.ts
@@ -130,11 +130,11 @@ export class OutboxWatcherService
     if (!acquired) return; // 다른 인스턴스가 먼저 처리함
 
     // 금액 오류는 프로세서에서 즉시 중단, 그 외(네트워크 등)는 적극 재시도
-    // 10회, 초기 60초 지수 백오프 → 최대 누적 대기 ~17시간
+    // 10회, 초기 5초 지수 백오프 → 최대 누적 대기 ~43분
     try {
       await this.escrowCreateQueue.add(doc.payload as EscrowCreateJobData, {
         attempts: 10,
-        backoff: { type: "exponential", delay: 60_000 },
+        backoff: { type: "exponential", delay: 5_000 },
       });
     } catch (err: any) {
       this.logger.error(
diff --git a/src/modules/xrpl/xrpl.service.ts b/src/modules/xrpl/xrpl.service.ts
index 56eea7f..ef0f5ec 100644
--- a/src/modules/xrpl/xrpl.service.ts
+++ b/src/modules/xrpl/xrpl.service.ts
@@ -92,20 +92,31 @@ export class XrplService implements OnModuleInit, OnModuleDestroy {
 
   // 중복 websocket 중복 연결 방지 및 재연결 로직
   private async connect() {
-    if (!this.client) {
-      this.client = new Client(this.wsUrl);
-    }
-    if (this.client.isConnected()) {
+    if (this.client?.isConnected()) {
       return;
     }
     if (!this.connectPromise) {
-      this.connectPromise = this.client.connect().finally(() => {
-        this.connectPromise = undefined;
-      });
+      // 연결이 끊긴 상태에서 재연결 시 기존 Client를 버리고 새로 생성
+      // 기존 Client를 재사용하면 "Websocket connection never cleaned up" 에러 발생
+      this.client = new Client(this.wsUrl, { connectionTimeout: 3_000 });
+      this.logger.log(`[XRPL] Connecting to ${this.wsUrl}`);
+      this.connectPromise = this.client
+        .connect()
+        .then(() => {
+          this.logger.log(`[XRPL] Connected to ${this.wsUrl}`);
+        })
+        .catch((err: Error) => {
+          this.logger.error(
+            `[XRPL] Connection failed (${this.wsUrl}): ${err.message}`,
+          );
+          throw err;
+        })
+        .finally(() => {
+          this.connectPromise = undefined;
+        });
     }
 
     await this.connectPromise;
-    this.logger.log(`Connected to XRPL: ${this.wsUrl}`);
   }
 
   // 신규 지갑 생성