diff --git a/packages/hydrooj/src/handler/judge.ts b/packages/hydrooj/src/handler/judge.ts
index c474f7427..e196b167b 100644
--- a/packages/hydrooj/src/handler/judge.ts
+++ b/packages/hydrooj/src/handler/judge.ts
@@ -78,7 +78,7 @@ export async function next(body: Partial<JudgeResultBody>) {
         $set, $push, $unset, $inc,
     } = processPayload(body);
     const rdoc = await record.update(body.domainId, body.rid, $set, $push, $unset, $inc);
-    bus.broadcast('record/change', rdoc, $set, $push, body);
+    if (rdoc) bus.broadcast('record/change', rdoc, $set, $push, body);
     return rdoc;
 }
 
@@ -144,10 +144,9 @@ export async function end(body: Partial<JudgeResultBody>) {
     const $unset: any = { progress: '' };
     $set.judgeAt = new Date();
     $set.judger = body.judger ?? 1;
-    let rdoc = await record.update(body.domainId, body.rid, $set, $push, $unset);
+    const rdoc = await record.update(body.domainId, body.rid, $set, $push, $unset);
+    if (rdoc) bus.broadcast('record/change', rdoc, null, null, body); // trigger a full update
     await postJudge(rdoc);
-    rdoc = await record.get(body.rid);
-    bus.broadcast('record/change', rdoc, null, null, body); // trigger a full update
     return rdoc;
 }
 
@@ -246,20 +245,17 @@ export class JudgeConnectionHandler extends ConnectionHandler {
     }
 
     async newTask(t: Task) {
-        const rdoc = await record.get(t.domainId, t.rid);
-        if (!rdoc) return;
-
-        const rid = rdoc._id.toHexString();
+        const rid = t.rid.toHexString();
         let resolve: (_: any) => void;
         const p = new Promise((r) => { resolve = r; });
         this.tasks[rid] = {
             queue: new PQueue({ concurrency: 1 }),
-            domainId: rdoc.domainId,
+            domainId: t.domainId,
             resolve,
             t,
         };
-        this.send({ task: { ...rdoc, ...t } });
-        this.tasks[rid].queue.add(() => next({ status: STATUS.STATUS_FETCHED, domainId: rdoc.domainId, rid: rdoc._id }));
+        this.send({ task: t });
+        this.tasks[rid].queue.add(() => next({ status: STATUS.STATUS_FETCHED, domainId: t.domainId, rid: t.rid }));
         await p;
         delete this.tasks[rid];
     }
diff --git a/packages/hydrooj/src/model/record.ts b/packages/hydrooj/src/model/record.ts
index 3b4174590..26b6715de 100644
--- a/packages/hydrooj/src/model/record.ts
+++ b/packages/hydrooj/src/model/record.ts
@@ -2,7 +2,7 @@
 import { sum } from 'lodash';
 import moment from 'moment-timezone';
 import {
-    Filter, MatchKeysAndValues,
+    Filter, FindOptions, MatchKeysAndValues,
     ObjectId, OnlyFieldsOfType, PushOperator, UpdateFilter,
 } from 'mongodb';
 import { Context } from '../context';
@@ -78,15 +78,23 @@ export default class RecordModel {
         };
     }
 
-    static async judge(domainId: string, rids: MaybeArray<ObjectId>, priority = 0, config: ProblemConfigFile = {}, meta: Partial<JudgeMeta> = {}) {
-        rids = rids instanceof Array ? rids : [rids];
-        if (!rids.length) return null;
-        const rdocs = await RecordModel.getMulti(domainId, { _id: { $in: rids } }).toArray();
+    static async judge(
+        domainId: string, rids: MaybeArray<ObjectId> | RecordDoc, priority = 0,
+        config: ProblemConfigFile = {}, meta: Partial<JudgeMeta> = {},
+    ) {
+        let rdocs: RecordDoc[];
+        const _rids = rids instanceof Array ? rids
+            : (rids instanceof ObjectId) ? [rids]
+                : [rids._id];
+        if (!_rids.length) return null;
+        if (rids instanceof Array || rids instanceof ObjectId || ObjectId.isValid(rids.toString())) {
+            rdocs = await RecordModel.getMulti(domainId, { _id: { $in: _rids } }, { readPreference: 'primary' }).toArray();
+        } else rdocs = [rids];
         if (!rdocs.length) return null;
         let source = `${domainId}/${rdocs[0].pid}`;
         let [pdoc] = await Promise.all([
             problem.get(domainId, rdocs[0].pid),
-            task.deleteMany({ rid: { $in: rids } }),
+            task.deleteMany({ rid: { $in: _rids } }),
         ]);
         if (!pdoc) throw new ProblemNotFoundError(domainId, rdocs[0].pid);
         if (pdoc.reference) {
@@ -102,8 +110,8 @@ export default class RecordModel {
             if (pdoc.config.type === 'remote_judge' && rdoc.contest?.toHexString() !== '0'.repeat(24)) type = 'remotejudge';
             else if (meta?.type === 'generate') type = 'generate';
             return ({
+                ...rdoc,
                 ...(pdoc.config as any), // TODO deprecate this
-                lang: rdoc.lang,
                 priority,
                 type,
                 rid: rdoc._id,
@@ -167,7 +175,7 @@ export default class RecordModel {
         bus.broadcast('record/change', data);
         if (addTask) {
             const priority = await RecordModel.submissionPriority(uid, args.type === 'pretest' ? -20 : (isContest ? 50 : 0));
-            await RecordModel.judge(domainId, res.insertedId, priority, isContest ? { detail: false } : {}, {
+            await RecordModel.judge(domainId, data, priority, isContest ? { detail: false } : {}, {
                 type: args.type,
                 rejudge: data.rejudged,
             });
@@ -175,9 +183,9 @@ export default class RecordModel {
         return res.insertedId;
     }
 
-    static getMulti(domainId: string, query: any) {
+    static getMulti(domainId: string, query: any, options?: FindOptions) {
         if (domainId) query = { domainId, ...query };
-        return RecordModel.coll.find(query);
+        return RecordModel.coll.find(query, options);
     }
 
     static getMultiStat(domainId: string, query: any, sortBy: any = { _id: -1 }) {
@@ -208,7 +216,7 @@ export default class RecordModel {
             );
             return res.value || null;
         }
-        return await RecordModel.get(domainId, _id);
+        return await RecordModel.coll.findOne({ _id }, { readPreference: 'primary' });
     }
 
     static async updateMulti(
diff --git a/packages/vjudge/src/index.ts b/packages/vjudge/src/index.ts
index 19e9f0e6d..3417fc5a0 100644
--- a/packages/vjudge/src/index.ts
+++ b/packages/vjudge/src/index.ts
@@ -42,8 +42,6 @@ class AccountService {
     }
 
     async judge(task) {
-        const rdoc = await RecordModel.get(task.domainId, task.rid);
-        task = Object.assign(rdoc, task);
         const next = (payload) => JudgeHandler.next({ ...payload, rid: task.rid, domainId: task.domainId });
         const end = (payload) => JudgeHandler.end({ ...payload, rid: task.rid, domainId: task.domainId });
         await next({ status: STATUS.STATUS_FETCHED });