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[GH-ISSUE #1182] Bug: --json mode going into a infinite loop? #47114

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opened 2026-04-28 03:16:34 -05:00 by GiteaMirror · 6 comments
GiteaMirror commented 2026-04-28 03:16:34 -05:00
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Originally created by @hemanth on GitHub (Nov 17, 2023).
Original GitHub issue: https://github.com/ollama/ollama/issues/1182

Originally assigned to: @BruceMacD on GitHub.

/tmp took 37s 
❯ ollama run llama2 --format json
>>> give me 10 emojis with their meanings
{   

  

 

 

 

 .... # never ends for that input

https://github.com/jmorganca/ollama/assets/18315/6771fd1f-d0e3-4f1f-9e7b-e15bacf8acad

^ recording

Originally created by @hemanth on GitHub (Nov 17, 2023). Original GitHub issue: https://github.com/ollama/ollama/issues/1182 Originally assigned to: @BruceMacD on GitHub. ```sh /tmp took 37s ❯ ollama run llama2 --format json >>> give me 10 emojis with their meanings { .... # never ends for that input ``` https://github.com/jmorganca/ollama/assets/18315/6771fd1f-d0e3-4f1f-9e7b-e15bacf8acad ^ recording
GiteaMirror added the bug label 2026-04-28 03:16:34 -05:00
GiteaMirror commented 2026-04-28 03:16:44 -05:00
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@jmorganca commented on GitHub (Nov 17, 2023):

Hi @hemanth sorry you hit this issue. It's important sometimes to add Answer in JSON in the response so the model can better predict JSON fields (I'll still label this as a bug)

<!-- gh-comment-id:1817183106 --> @jmorganca commented on GitHub (Nov 17, 2023): Hi @hemanth sorry you hit this issue. It's important sometimes to add `Answer in JSON` in the response so the model can better predict JSON fields (I'll still label this as a bug)
GiteaMirror commented 2026-04-28 03:16:48 -05:00
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@hemanth commented on GitHub (Nov 17, 2023):

>>> give me 3 emojis and meanings in JSON format
{
  "emojis":[
    {"name":"😂", "meaning":"laughter"},
    {"name":"🤔", "meaning":"thoughtfulness"},
    {"name":"🎉", "meaning":"celebration"}
  ] 
}

Nice!

Interestingly:

>>> give me 5 emojis and meanings
{"emojis":[
"😂",
"🤔",
"🎉",
"🚀",
"👍"
] }

>>> give me 5 emojis and meanings in JSON format
{"emojis":[
{"name":"😂", "meaning":"laughter"},
{"name":"🤔", "meaning":"thoughtfulness"},
{"name":"🎉", "meaning":"celebration"},
{"name":"🚀", "meaning":"aspiration"},
{"name":"👍", "meaning":"approval"}
] }
<!-- gh-comment-id:1817216722 --> @hemanth commented on GitHub (Nov 17, 2023): ```sh >>> give me 3 emojis and meanings in JSON format { "emojis":[ {"name":"😂", "meaning":"laughter"}, {"name":"🤔", "meaning":"thoughtfulness"}, {"name":"🎉", "meaning":"celebration"} ] } ``` Nice! Interestingly: ```sh >>> give me 5 emojis and meanings {"emojis":[ "😂", "🤔", "🎉", "🚀", "👍" ] } >>> give me 5 emojis and meanings in JSON format {"emojis":[ {"name":"😂", "meaning":"laughter"}, {"name":"🤔", "meaning":"thoughtfulness"}, {"name":"🎉", "meaning":"celebration"}, {"name":"🚀", "meaning":"aspiration"}, {"name":"👍", "meaning":"approval"} ] } ```
GiteaMirror commented 2026-04-28 03:16:55 -05:00
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@igorschlum commented on GitHub (Nov 18, 2023):

For me it's working without specifying json in the prompt. (I have 32Gb on M1Pro MacBook)

(base) igor@macIgor ~ % ollama run llama2 --format json

give me 10 emojis with their meanings
{ "😊": "Happy", "👍": "Okay", "🤔": "Thinking", "🚀": "Space", "🎉": "Celebration", "💭": "Thoughts", "🤝":
"Friendship", "🌈": "Rainbow", "🏆": "Trophy", "📚": "Book" }

<!-- gh-comment-id:1817574613 --> @igorschlum commented on GitHub (Nov 18, 2023): For me it's working without specifying json in the prompt. (I have 32Gb on M1Pro MacBook) (base) igor@macIgor ~ % ollama run llama2 --format json >>> give me 10 emojis with their meanings { "😊": "Happy", "👍": "Okay", "🤔": "Thinking", "🚀": "Space", "🎉": "Celebration", "💭": "Thoughts", "🤝": "Friendship", "🌈": "Rainbow", "🏆": "Trophy", "📚": "Book" }
GiteaMirror commented 2026-04-28 03:16:57 -05:00
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@nathanleclaire commented on GitHub (Feb 7, 2024):

It seems to spin out of control for me quite often in the "REPL" mode specifically. It will just go nutty dumping newlines after it finishes the JSON object.

<!-- gh-comment-id:1933017316 --> @nathanleclaire commented on GitHub (Feb 7, 2024): It seems to spin out of control for me quite often in the "REPL" mode specifically. It will just go nutty dumping newlines after it finishes the JSON object.
GiteaMirror commented 2026-04-28 03:16:58 -05:00
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@BruceMacD commented on GitHub (Mar 12, 2024):

Resolving this to unify with #1910, which will be solved by #3080

<!-- gh-comment-id:1992315257 --> @BruceMacD commented on GitHub (Mar 12, 2024): Resolving this to unify with #1910, which will be solved by #3080
GiteaMirror commented 2026-04-28 03:17:00 -05:00
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@bitsydarel commented on GitHub (May 12, 2025):

This seems to be back with 0.6.8 on gemma3 and qwen3

<!-- gh-comment-id:2870547375 --> @bitsydarel commented on GitHub (May 12, 2025): This seems to be back with 0.6.8 on gemma3 and qwen3
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