大家好，
我想通过运行 ./launcher rebuild app 来更新我的 Discourse。它之前运行正常，大约有一年了。我通常每 2-4 周进行一次更新，以确保系统处于最新状态。
我的系统是 Ubuntu 18.04.5 LTS：
***@***:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.5 LTS
Release: 18.04
Codename: bionic
今天更新时出现了以下错误并停止：
FAILED
--------------------
Pups::ExecError: cd /var/www/discourse && su discourse -c 'bundle exec rake themes:update assets:precompile' failed with return #<Process::Status: pid 726 exit 1>
Location of failure: /pups/lib/pups/exec_command.rb:112:in `spawn'
exec failed with the params {"cd"=>"$home", "hook"=>"assets_precompile", "cmd"=>["su discourse -c 'bundle exec rake themes:update assets:precompile'"]}
db6d1b1dd685de69942a3df05c9cbd622860faaa286b042635878519d5b69b7b
** FAILED TO BOOTSTRAP ** please scroll up and look for earlier error messages, there may be more than one.
./discourse-doctor may help diagnose the problem.
该消息之前的第一个错误是：
<--- JS stacktrace --->
FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - JavaScript heap out of memory
1: 0xa04200 node::Abort() [node]
2: 0x94e4e9 node::FatalError(char const*, char const*) [node]
3: 0xb7978e v8::Utils::ReportOOMFailure(v8::internal::Isolate*, char const*, bool) [node]
4: 0xb79b07 v8::internal::V8::FatalProcessOutOfMemory(v8::internal::Isolate*, char const*, bool) [node]
5: 0xd34395 [node]
6: 0xd46c01 v8::internal::Heap::AllocateRawWithRetryOrFailSlowPath(int, v8::internal::AllocationType, v8::internal::AllocationOrigin, v8::internal::AllocationAlignment) [node]
7: 0xd0c472 v8::internal::Factory::AllocateRaw(int, v8::internal::AllocationType, v8::internal::AllocationAlignment) [node]
8: 0xd086c2 v8::internal::FactoryBase<v8::internal::Factory>::AllocateRawArray(int, v8::internal::AllocationType) [node]
9: 0xd08774 v8::internal::FactoryBase<v8::internal::Factory>::NewFixedArrayWithFiller(v8::internal::Handle<v8::internal::Map>, int, v8::internal::Handle<v8::internal::Oddball>, v8::internal::AllocationType) [node]
10: 0xf4ef4b v8::internal::OrderedHashTable<v8::internal::OrderedHashSet, 1>::Allocate(v8::internal::Isolate*, int, v8::internal::AllocationType) [node]
11: 0xf4f0df v8::internal::OrderedHashTable<v8::internal::OrderedHashSet, 1>::Rehash(v8::internal::Isolate*, v8::internal::Handle<v8::internal::OrderedHashSet>, int) [node]
12: 0x103eb98 v8::internal::Runtime_SetGrow(int, unsigned long*, v8::internal::Isolate*) [node]
13: 0x1401219 [node]
Aborted (core dumped)
rake aborted!
Errno::ENOENT: No such file or directory @ rb_file_s_size - /var/www/discourse/public/assets/discourse/tests/test_helper-a9cbc4e1abdd1f2e9afced86d051cbd63c2e224dafe782533646a01592cc1f42.js
/var/www/discourse/lib/tasks/assets.rake:290:in `size'
/var/www/discourse/lib/tasks/assets.rake:290:in `block (4 levels) in <main>'
/var/www/discourse/lib/tasks/assets.rake:181:in `block in concurrent?'
/var/www/discourse/lib/tasks/assets.rake:281:in `block (3 levels) in <main>'
/var/www/discourse/lib/tasks/assets.rake:272:in `each'
/var/www/discourse/lib/tasks/assets.rake:272:in `block (2 levels) in <main>'
/var/www/discourse/lib/tasks/assets.rake:181:in `concurrent?'
/var/www/discourse/lib/tasks/assets.rake:269:in `block in <main>'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.3/exe/rake:27:in `<top (required)>'
/usr/local/bin/bundle:23:in `load'
/usr/local/bin/bundle:23:in `<main>'
Tasks: TOP => assets:precompile
(See full trace by running task with --trace)
I, [2021-04-26T13:10:13.996101 #1] INFO -- : Downloading MaxMindDB...
Compressing Javascript and Generating Source Maps
I, [2021-04-26T13:10:14.018697 #1] INFO -- : Terminating async processes
I, [2021-04-26T13:10:14.020721 #1] INFO -- : Sending INT to HOME=/var/lib/postgresql USER=postgres exec chpst -u postgres:postgres:ssl-cert -U postgres:postgres:ssl-cert /usr/lib/postgresql/13/bin/postmaster -D /etc/postgresql/13/main pid: 55
I, [2021-04-26T13:10:14.022854 #1] INFO -- : Sending TERM to exec chpst -u redis -U redis /usr/bin/redis-server /etc/redis/redis.conf pid: 172
172:signal-handler (1619442614) Received SIGTERM scheduling shutdown...
2021-04-26 13:10:14.023 UTC [55] LOG: received fast shutdown request
2021-04-26 13:10:14.030 UTC [55] LOG: aborting any active transactions
2021-04-26 13:10:14.043 UTC [55] LOG: background worker "logical replication launcher" (PID 64) exited with exit code 1
2021-04-26 13:10:14.045 UTC [59] LOG: shutting down
2021-04-26 13:10:14.073 UTC [55] LOG: database system is shut down
172:M 26 Apr 2021 13:10:14.122 # User requested shutdown...
172:M 26 Apr 2021 13:10:14.123 * Saving the final RDB snapshot before exiting.
172:M 26 Apr 2021 13:10:14.270 * DB saved on disk
172:M 26 Apr 2021 13:10:14.271 # Redis is now ready to exit, bye bye...
更新失败后，Discourse 无法运行。只有重启服务器后 Discourse 才能再次运行，但此时再次运行 rebuild app 时仍会出现相同的错误。
您能和我一起排查一下这个问题吗？
此致
