فشل الاستعادة، وتعليق، وانتهاء مهلة في ALTER TABLE

deargle · 2 أبريل 2021، 11:43م

حدث عطل في القرص على خادم Discourse، وأحاول استعادة نسخة احتياطية من S3 إلى مثيل AWS EC2 من نوع t2.small. أحصل باستمرار على الخطأ أدناه.

باستخدام هذه العملية:

git clone https://github.com/discourse/discourse_docker /var/discourse

أستخدم ملف app.yml هذا

./launcher bootstrap app
./launcher start app

ثم أنقل النسخة الاحتياطية عبر scp، وأدخل إلى التطبيق بـ ./launcher enter app، ثم أُفعّل الاستعادة بـ discourse enable_restore وأُجري الاستعادة بـ discourse restore <الملف>.

ثم يحدث هذا، مع اقتطاع البداية:

14
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setval
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setval
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1
(1 row)
ALTER TABLE
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ALTER TABLE
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 #<Thread:0x0000562604925448 /var/www/discourse/lib/sidekiq/pausable.rb:79 run> terminated with exception (report_on_exception is true):
Traceback (most recent call last):
        33: from /var/www/discourse/lib/sidekiq/pausable.rb:83:in `block (2 levels) in extend_lease_thread'
        32: from /var/www/discourse/lib/sidekiq/pausable.rb:83:in `synchronize'
        31: from /var/www/discourse/lib/sidekiq/pausable.rb:84:in `block (3 levels) in extend_lease_thread'
        30: from /usr/local/lib/ruby/2.7.0/set.rb:328:in `each'
        29: from /usr/local/lib/ruby/2.7.0/set.rb:328:in `each_key'
        28: from /var/www/discourse/lib/sidekiq/pausable.rb:85:in `block (4 levels) in extend_lease_thread'
        27: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rails_multisite-2.5.0/lib/rails_multisite/connection_management.rb:76:in `with_connection'
        26: from /var/www/discourse/lib/sidekiq/pausable.rb:86:in `block (5 levels) in extend_lease_thread'
        25: from /var/www/discourse/lib/discourse_redis.rb:59:in `block (2 levels) in <class:DiscourseRedis>'
        24: from /var/www/discourse/lib/discourse_redis.rb:29:in `ignore_readonly'
        23: from /var/www/discourse/lib/discourse_redis.rb:59:in `block (3 levels) in <class:DiscourseRedis>'
        22: from /var/www/discourse/lib/discourse_redis.rb:59:in `public_send'
        21: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis.rb:425:in `expire'
        20: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis.rb:69:in `synchronize'
        19: from /usr/local/lib/ruby/2.7.0/monitor.rb:202:in `mon_synchronize'
        18: from /usr/local/lib/ruby/2.7.0/monitor.rb:202:in `synchronize'
        17: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis.rb:69:in `block in synchronize'
        16: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis.rb:426:in `block in expire'
        15: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rack-mini-profiler-2.3.1/lib/mini_profiler/profiling_methods.rb:85:in `block in profile_method'
        14: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:131:in `call'
        13: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:237:in `process'
        12: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:325:in `logging'
        11: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:238:in `block in process'
        10: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:389:in `ensure_connected'
         9: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:248:in `block (2 levels) in process'
         8: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:131:in `block in call'
         7: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:279:in `read'
         6: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:268:in `io'
         5: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:280:in `block in read'
         4: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/connection/ruby.rb:378:in `read'
         3: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/connection/ruby.rb:45:in `gets'
         2: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/connection/ruby.rb:52:in `_read_from_socket'
         1: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/connection/ruby.rb:52:in `loop'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/connection/ruby.rb:56:in `block in _read_from_socket': Redis::TimeoutError (Redis::TimeoutError)
        33: from /var/www/discourse/lib/sidekiq/pausable.rb:83:in `block (2 levels) in extend_lease_thread'
        32: from /var/www/discourse/lib/sidekiq/pausable.rb:83:in `synchronize'
        31: from /var/www/discourse/lib/sidekiq/pausable.rb:84:in `block (3 levels) in extend_lease_thread'
        30: from /usr/local/lib/ruby/2.7.0/set.rb:328:in `each'
        29: from /usr/local/lib/ruby/2.7.0/set.rb:328:in `each_key'
        28: from /var/www/discourse/lib/sidekiq/pausable.rb:85:in `block (4 levels) in extend_lease_thread'
        27: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rails_multisite-2.5.0/lib/rails_multisite/connection_management.rb:76:in `with_connection'
        26: from /var/www/discourse/lib/sidekiq/pausable.rb:86:in `block (5 levels) in extend_lease_thread'
        25: from /var/www/discourse/lib/discourse_redis.rb:59:in `block (2 levels) in <class:DiscourseRedis>'
        24: from /var/www/discourse/lib/discourse_redis.rb:29:in `ignore_readonly'
        23: from /var/www/discourse/lib/discourse_redis.rb:59:in `block (3 levels) in <class:DiscourseRedis>'
        22: from /var/www/discourse/lib/discourse_redis.rb:59:in `public_send'
        21: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis.rb:425:in `expire'
        20: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis.rb:69:in `synchronize'
        19: from /usr/local/lib/ruby/2.7.0/monitor.rb:202:in `mon_synchronize'
        18: from /usr/local/lib/ruby/2.7.0/monitor.rb:202:in `synchronize'
        17: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis.rb:69:in `block in synchronize'
        16: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis.rb:426:in `block in expire'
        15: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rack-mini-profiler-2.3.1/lib/mini_profiler/profiling_methods.rb:85:in `block in profile_method'
        14: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:131:in `call'
        13: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:237:in `process'
        12: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:325:in `logging'
        11: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:238:in `block in process'
        10: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:389:in `ensure_connected'
         9: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:248:in `block (2 levels) in process'
         8: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:131:in `block in call'
         7: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:279:in `read'
         6: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:268:in `io'
         5: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/client.rb:280:in `block in read'
         4: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/connection/ruby.rb:378:in `read'
         3: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/connection/ruby.rb:45:in `gets'
         2: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/connection/ruby.rb:52:in `_read_from_socket'
         1: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/connection/ruby.rb:52:in `loop'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/redis-4.2.5/lib/redis/connection/ruby.rb:56:in `block in _read_from_socket': Connection timed out (Redis::TimeoutError)
^[[A  ^[[A^[[B       server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
connection to server was lost
EXCEPTION: psql failed: connection to server was lost

باستمرار، تصل العملية إلى هذه النقطة في عملية الاستعادة، ثم تتوقف عند أمر ALTER TABLE الأخير (الـ 85). قمت باستخراج ملف dump.sql من النسخة الاحتياطية، والجدول رقم 85، إذا كان عدّي صحيحًا، هو هذا الجدول: “public.reviewables”:

هل لديك أي فكرة مما قد يكون خاطئًا بناءً على ما ورد أعلاه؟

deargle · 3 أبريل 2021، 12:57ص

أعتقد أنني وجدت الحل. كان يجب أن أشغّل ./discourse-setup مرة واحدة على المضيف الجديد لـ (1) إنشاء ملف تبديل، و (2) ضبط db_shared_buffers بشكل صحيح. ربما كان أحد هذين الخطأين، أو كلاهما، هو ما تسبب في التعليد المستمر.

pfaffman · 3 أبريل 2021، 1:03ص

أحسنت! أهلاً بك مرة أخرى، وأهلاً بك في نادي “أجب على سؤالك الخاص”! لديّ مجموعة من هذه المواضيع، على الرغم من أنني متأكد من أن العديد منها قد حُذِف.

الأمر الآخر هو نسخ ملف app.yml، لكنك كنت ستظل بحاجة إلى تذكر عملية التبديل. باستثناء مشكلة التبديل، فإن ملف yml هو كل ما تحتاجه إذا كانت إعدادات S3 موجودة في ملف yml.

سعيد بعودتك للعمل!

الموضوع		الردود	مرات العرض
Help restoring - system hung at midnight Self-hosting	26	2506	13 يونيو 2022
Can't restore saved backup Self-hosting	3	1263	7 مارس 2017
Backup failed due to PG/SQL errors Self-hosting	9	2420	17 ديسمبر 2020
Hangs discourse and discourse restore FAILED Self-hosting	24	2083	26 أغسطس 2020
Restore has failed. when i backup and restore to a new discourse Support	13	1679	16 سبتمبر 2019

فشل الاستعادة، وتعليق، وانتهاء مهلة في ALTER TABLE

الموضوعات ذات الصلة