[BUG] torelant find participants for new leafer

src/storage/tx/ob_tx_2pc_msg_handler.cpp

@@ -634,7 +634,17 @@ int ObPartTransCtx::handle_tx_2pc_prepare_resp(const Ob2pcPrepareRespMsg &msg)
   if (OB_FAIL(set_2pc_request_id_(msg.request_id_))) {
     TRANS_LOG(WARN, "set request id failed", KR(ret), K(msg), K(*this));
   } else if (OB_FAIL(find_participant_id_(msg.sender_, participant_id))) {
-    TRANS_LOG(ERROR, "find participant failed", KR(ret), K(msg), K(*this));
+    if (0 == exec_info_.participants_.count()) {
+      // It may be possible that when the coordinator switches to the new
+      // leader, compensates the abort log while it may have already broadcasted
+      // the prepare requests by the old leader. And during the paxos of the
+      // abort log, it may receive the prepare response and has no participants
+      // list to handle the response, so we need tolerate it here.
+      ret = OB_SUCCESS;
+      TRANS_LOG(INFO, "find participant failed", KR(ret), K(msg), K(*this));
+    } else {
+      TRANS_LOG(ERROR, "find participant failed", KR(ret), K(msg), K(*this));
+    }
   } else if (OB_FAIL(handle_2pc_resp(msg_type, participant_id))) {
     TRANS_LOG(WARN, "handle 2pc response failed", KR(ret), K(msg), K(participant_id), K(*this));
   }