# 数据库迁移因表 "post\_custom\_fields" 中 "calendar-details" 项的巨大值而中断

**URL:** https://meta.discourse.org/t/database-migration-chokes-on-huge-value-of-a-calendar-details-item-in-table-post-custom-fields/172483
**Category:** Bug
**Created:** [2020年十二月7日 11:54 UTC](https://meta.discourse.org/t/database-migration-chokes-on-huge-value-of-a-calendar-details-item-in-table-post-custom-fields/172483 "2020-12-07T11:54:54Z")
**Posts on this page:** 1
**Showing post:** 2

<div class="post-metadata">

### Author: ![amotl](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/amotl/32/109873_2.png) [@amotl](https://meta.discourse.org/u/amotl)
#### Post date: [2020年十二月7日 12:26 UTC](https://meta.discourse.org/t/database-migration-chokes-on-huge-value-of-a-calendar-details-item-in-table-post-custom-fields/172483/2 "2020-12-07T12:26:36Z")

</div>

参照 [Upgrade of postgres failed](https://meta.discourse.org/t/upgrade-of-postgres-failed/165413) 和 [https://meta.discourse.org/t/postgresql-12-update/151236，我们尚未发现任何可能对此有所帮助的特定情况。](https://meta.discourse.org/t/postgresql-12-update/151236%EF%BC%8C%E6%88%91%E4%BB%AC%E5%B0%9A%E6%9C%AA%E5%8F%91%E7%8E%B0%E4%BB%BB%E4%BD%95%E5%8F%AF%E8%83%BD%E5%AF%B9%E6%AD%A4%E6%9C%89%E6%89%80%E5%B8%AE%E5%8A%A9%E7%9A%84%E7%89%B9%E5%AE%9A%E6%83%85%E5%86%B5%E3%80%82)

此安装规模并不大：

```plaintext
root@pulp:/srv/www/organizations/panodata/community.panodata.org# du -sch .
661M	总大小

```

尝试按顺序重新启动应用程序

> [@Falco](#):
>
> 使其恢复到更好的状态。

但失败了，因为 Rails 应用无法连接到 PostgreSQL：

```plaintext
===> shared/standalone/log/rails/unicorn.stderr.log <==
I, [2020-12-07T12:20:58.960126 #459] INFO -- : 正在刷新 Gem 列表
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/pg-1.1.4/lib/pg.rb:56:in `initialize': 无法连接到服务器：没有那个文件或目录 (PG::ConnectionBad)
	服务器是否在本地运行并正在接受
	Unix 域套接字 "/var/run/postgresql/.s.PGSQL.5432" 上的连接？
	来自 /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/pg-1.1.4/lib/pg.rb:56:in `new'
	来自 /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/pg-1.1.4/lib/pg.rb:56:in `connect'

```

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_[View the full topic](https://meta.discourse.org/t/database-migration-chokes-on-huge-value-of-a-calendar-details-item-in-table-post-custom-fields/172483)._