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[GH-ISSUE #1329] Out of nowhere when I run my script I get this error randomically: raise ValueError("No data received from Ollama stream.") #691
Closed
opened 2026-04-12 10:22:09 -05:00 by GiteaMirror
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Reference: github-starred/ollama#691
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Originally created by @alelagamba on GitHub (Nov 30, 2023).
Original GitHub issue: https://github.com/ollama/ollama/issues/1329
Traceback (most recent call last):
File "/Users//Desktop/python-test/display_attribute.py", line 34, in
answer = llm("Given this text:" + str(first_column_value) + "Does it talk about a display or screen of the product? Answer only 'Yes' or 'No'.")
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users//Desktop/python-test/.venv/lib/python3.11/site-packages/langchain_core/language_models/llms.py", line 879, in call
self.generate(
File "/Users//Desktop/python-test/.venv/lib/python3.11/site-packages/langchain_core/language_models/llms.py", line 656, in generate
output = self._generate_helper(
^^^^^^^^^^^^^^^^^^^^^^
File "/Users//Desktop/python-test/.venv/lib/python3.11/site-packages/langchain_core/language_models/llms.py", line 543, in _generate_helper
raise e
File "/Users//Desktop/python-test/.venv/lib/python3.11/site-packages/langchain_core/language_models/llms.py", line 530, in _generate_helper
self._generate(
File "/Users//Desktop/python-test/.venv/lib/python3.11/site-packages/langchain/llms/ollama.py", line 241, in _generate
final_chunk = super()._stream_with_aggregation(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users//Desktop/python-test/.venv/lib/python3.11/site-packages/langchain/llms/ollama.py", line 190, in _stream_with_aggregation
raise ValueError("No data received from Ollama stream.")
ValueError: No data received from Ollama stream.
(.venv) sh-3.2$
I really have no clue because previously it all worked really fine. It's just a simple script that takes a string from a csv and puts it inside the question for the LLM like so:
answer = llm("Given this text:" + str(first_column_value) + "Does it talk about a display or screen of the product? Answer only 'Yes' or 'No'.")
@Govind-S-B commented on GitHub (Dec 2, 2023):
Same issue here, my thing was working fine last week but now it just breaks , not sure why its breaking either. Related issue : https://github.com/whitead/paper-qa/issues/213
Refer :
41ee3be95f/libs/langchain/langchain/llms/ollama.py (L176-L200)@BruceMacD commented on GitHub (Dec 4, 2023):
This seems like it could be an error in Langchain. Maybe from an older version. Is anyone able to reproduce using one of our examples?
https://github.com/jmorganca/ollama/tree/main/examples/langchain-python-simple
@Govind-S-B commented on GitHub (Dec 5, 2023):
Yeah it seems to be working fine with the hello world application , I wonder what went wrong with my code , will look into it later.
But here is the result for the example :

@alelagamba commented on GitHub (Dec 5, 2023):
The thing is that also for my code it runs pretty well usually, but sometimes out of nowhere it shows me the error I wrote in the original post. Don't actually know what to do, for sure the only thing that partially solves the problem is that when I use the Run&Debug mode it tends to bring the error much later than when I run it normally.
@BruceMacD commented on GitHub (Dec 5, 2023):
Any idea which version of langchain's python library you are seeing this on?
@dennis-thevara commented on GitHub (Dec 7, 2023):
So I've been having this issue as well, and it's quite strange, because like OP I've been able to run things fine last week. I was trying to run the Private Multi-Modal RAG Cookbook in the Langchain repo.
For what it's worth, when I ran it, Ollama is indeed streaming a sequence of tokens. I've verified this with the
StreamingStdOutCallbackHandler. What I've noticed is the aforementioned error only hits at the very end of the streaming response, once the model has concluded its output.By the traceback, in
ollama.py,_stream_with_aggregationraises the error when the final chunk it gets from Ollama isNone. Out of curiosity I changed this to set the final chunk to aGenerationChunkobject with thetextattribute set to an empty string. My assumption was that the final token from Ollama would be a nonetype when it's done, so instead of raising an error, I had it return an analogue to an end-of-text object. This appears to fix the issue for my specific use case, but I highly doubt this is sensible for general use. I haven't looked into whether it will break anything else. I just figured I'd chime in, in case it provides a clue about what's causing the issue.For reference, I am using
langchain==0.0.344and this is the change I made in_stream_with_aggregation:EDIT: Update on Dec 11: Reversing this edit, and updating ollama from
0.1.12to0.1.14fixed the issue for me.@kwong99 commented on GitHub (Dec 7, 2023):
I ran into the same issue when I have 2 calls to chain.invoke()
The first chain.invoke always works. Only the second chain.invoke call failed.
What I found out is that if I used LLMChain and it would work but the placement of the import statement is important.
If the import is in the beginning of the script then it would failed the same way.
But with the the import of LLMChain right before the second chain.invoke or chain() and it would work fine
langchain Version: 0.0.340
ollama version 0.1.13
Note it used to all works fine with: ollama version 0.1.8
Here the script failed with LLMChain defined at the beginning of the script
======
This script is based on the course from deeplearning.ai
from langchain.llms import Ollama
from langchain.callbacks.manager import CallbackManager
from langchain.callbacks.streaming_stdout import StreamingStdOutCallbackHandler
from langchain.prompts import PromptTemplate
#from langchain.chains import LLMChain
customer_email = """
Arrr, I be fuming that me blender lid
flew off and splattered me kitchen walls
with smoothie! And to make matters worse,
the warranty don't cover the cost of
cleaning up me kitchen. I need yer help
right now, matey!
"""
style = """American English
in a calm and respectful tone
"""
customer_template = """Translate the text
that is delimited by triple backticks
into a style that is {style}.
text:
{customer_email}"""
customer_prompt = PromptTemplate(input_variables=["style", "customer_email"], template=customer_template)
print(f"prompt: {customer_prompt}")
llm = Ollama(model="mistral:instruct")
chain1 = customer_prompt | llm
response = chain1.invoke({"style": style, "customer_email": customer_email})
Service reply
service_reply = """Hey there customer,
the warranty does not cover
cleaning expenses for your kitchen
because it's your fault that
you misused your blender
by forgetting to put the lid on before
starting the blender.
Tough luck! See ya!
"""
service_style_pirate = """
a polite tone
that speaks in Spanish
"""
service_template = """Translate the text
that is delimited by triple backticks
into a style that is {style}.
text:
{service_reply}"""
service_prompt = PromptTemplate(input_variables=["style", "service_reply"], template=service_template)
#chain2 = service_prompt | llm
from langchain.chains import LLMChain
chain2 = LLMChain(llm=llm, prompt=service_prompt, verbose=True)
print(f"222 chain2: {chain2}")
response = chain2.invoke({"style": service_style_pirate, "service_reply": service_reply})
print(f"Service response: >>>{response}<<<")
@kennethwork101 commented on GitHub (Dec 10, 2023):
Installed ollama version is 0.1.14 and is working now.
ollama version 0.1.13 was failing.
No change to langchain Version: 0.0.340
@dennis-thevara commented on GitHub (Dec 11, 2023):
Can confirm that updating ollama fixed it for me too. Mine was 0.1.12 before update.
@BruceMacD commented on GitHub (Dec 11, 2023):
Thanks for letting us know this is working now. I suspect this was a concurrent request bug that I fixed in the last release. Resolving this now.
@kwong99 commented on GitHub (Dec 12, 2023):
Hi,
Thanks for fixing the issue.
Is there a way to install a previous version of ollama?
I am hoping to run a previous version if the current version is having
issues.
Thanks.
kenneth
On Mon, Dec 11, 2023 at 2:40 PM Bruce MacDonald @.***>
wrote:
@BruceMacD commented on GitHub (Dec 12, 2023):
@kwong99 if you're seeing the error in this issue using the most recent version will most likely fix the issue, otherwise you can download old versions from here:
https://github.com/jmorganca/ollama/releases