Job exception: undefined method `finish' for nil when using ai bot

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AI-generated summary

A user reports an error when using the Discourse AI plugin with a custom OpenAI-compatible API (jabirproject.org). The error, Job exception: undefined method finish’ for nil`, occurs during AI chatbot interactions, though summarization works. The backtrace points to an issue in the plugin’s OpenAI endpoint handling. user1 identifies the problem as a lack of streaming data chunks from the API, which causes the error. sam notes the issue stems from incompatibility and that even if the exception is fixed, responses would remain empty. The thread is marked as stale by sam.

1

Hi, i had recently installed the discourse ai plugin, and i had configured it to use a custom openai compatible api (jabirproject.org).

it works in summarizing the threads but not as an ai chatbot.
when sending a message it shows this error:

 Job exception: undefined method `finish' for nil

this is the backtrace:

Message (6 copies reported)

Job exception: undefined method `finish' for nil

Backtrace

/var/www/discourse/plugins/discourse-ai/lib/completions/endpoints/open_ai.rb:122:in `decode_chunk_finish'
/var/www/discourse/plugins/discourse-ai/lib/completions/endpoints/base.rb:185:in `block (2 levels) in perform_completion!'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/net-http-0.6.0/lib/net/http.rb:2433:in `block in transport_request'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/net-http-0.6.0/lib/net/http/response.rb:320:in `reading_body'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/net-http-0.6.0/lib/net/http.rb:2430:in `transport_request'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/net-http-0.6.0/lib/net/http.rb:2384:in `request'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-3.3.1/lib/patches/net_patches.rb:19:in `block in request_with_mini_profiler'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-3.3.1/lib/mini_profiler/profiling_methods.rb:50:in `step'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-3.3.1/lib/patches/net_patches.rb:18:in `request_with_mini_profiler'
/var/www/discourse/plugins/discourse-ai/lib/completions/endpoints/base.rb:93:in `block in perform_completion!'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/net-http-0.6.0/lib/net/http.rb:1632:in `start'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/net-http-0.6.0/lib/net/http.rb:1070:in `start'
/var/www/discourse/plugins/discourse-ai/lib/completions/endpoints/base.rb:76:in `perform_completion!'
/var/www/discourse/plugins/discourse-ai/lib/completions/endpoints/open_ai.rb:40:in `perform_completion!'
/var/www/discourse/plugins/discourse-ai/lib/completions/llm.rb:279:in `generate'
/var/www/discourse/plugins/discourse-ai/lib/ai_bot/bot.rb:115:in `reply'
/var/www/discourse/plugins/discourse-ai/lib/ai_bot/playground.rb:477:in `reply_to'
/var/www/discourse/plugins/discourse-ai/app/jobs/regular/create_ai_reply.rb:18:in `execute'
/var/www/discourse/app/jobs/base.rb:316:in `block (2 levels) in perform'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rails_multisite-6.1.0/lib/rails_multisite/connection_management/null_instance.rb:49:in `with_connection'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rails_multisite-6.1.0/lib/rails_multisite/connection_management.rb:21:in `with_connection'
/var/www/discourse/app/jobs/base.rb:303:in `block in perform'
/var/www/discourse/app/jobs/base.rb:299:in `each'
/var/www/discourse/app/jobs/base.rb:299:in `perform'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/processor.rb:202:in `execute_job'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/processor.rb:170:in `block (2 levels) in process'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/middleware/chain.rb:177:in `block in invoke'
/var/www/discourse/lib/sidekiq/pausable.rb:132:in `call'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/middleware/chain.rb:179:in `block in invoke'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/middleware/chain.rb:182:in `invoke'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/processor.rb:169:in `block in process'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/processor.rb:136:in `block (6 levels) in dispatch'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/job_retry.rb:113:in `local'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/processor.rb:135:in `block (5 levels) in dispatch'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq.rb:44:in `block in <module:Sidekiq>'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/processor.rb:131:in `block (4 levels) in dispatch'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/processor.rb:263:in `stats'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/processor.rb:126:in `block (3 levels) in dispatch'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/job_logger.rb:13:in `call'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/processor.rb:125:in `block (2 levels) in dispatch'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/job_retry.rb:80:in `global'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/processor.rb:124:in `block in dispatch'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/job_logger.rb:39:in `prepare'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/processor.rb:123:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/processor.rb:168:in `process'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/processor.rb:78:in `process_one'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/processor.rb:68:in `run'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/component.rb:8:in `watchdog'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/sidekiq-6.5.12/lib/sidekiq/component.rb:17:in `block in safe_thread'

my discourse version is 3.4.0.beta4-dev

1 Like
DeepSeek-R1 randomly producing "Job exception: undefined method `finish' for nil" error
2

I would say it is not quite compatible…

This means it was streaming a response but got no actual chunks of data from the provider.

We can fix the exception there but you would still just be left with empty responses.

3 Likes
3

closing this as stale for now.