Kafka扩分区和分区副本重分配之后消费组会自动均衡吗？

    @Override
    public boolean rejoinNeededOrPending() {
        if (!subscriptions.hasAutoAssignedPartitions())
            return false;

        // we need to rejoin if we performed the assignment and metadata has changed;
        // also for those owned-but-no-longer-existed partitions we should drop them as lost
        // 如果订阅的Topic元信息有过变更，则需要重新发起joinGroup请求
        if (assignmentSnapshot != null && !assignmentSnapshot.matches(metadataSnapshot)) {
            log.info("Requesting to re-join the group and trigger rebalance since the assignment metadata has changed from {} to {}",
                    assignmentSnapshot, metadataSnapshot);

            requestRejoin();
            return true;
        }

        // we need to join if our subscription has changed since the last join
        //如果我们的订阅自上次加入以来发生了变化，我们需要重新发起请求 JoinGroup
        if (joinedSubscription != null && !joinedSubscription.equals(subscriptions.subscription())) {
            log.info("Requesting to re-join the group and trigger rebalance since the subscription has changed from {} to {}",
                joinedSubscription, subscriptions.subscription());

            requestRejoin();
            return true;
        }

        return super.rejoinNeededOrPending();
    }