Azure Content Safety blocklist inconsistent across backend clusters

Question

Azure Content Safety blocklist inconsistent across backend clusters

JUNED KHAN 0

Hello Azure Support,

We are experiencing inconsistent behavior with Azure AI Content Safety text analysis.

Resource details:

Resource: trimlink-resource
Region: East US
Endpoint: <endpoint>cognitiveservices.azure.com
API version: 2024-09-15-preview
Operation: POST /contentsafety/text:analyze

We use these text blocklists:

["Drugs", "Gambling", "Illegal_Content"]

The blocklists are visible through the list API and are returned successfully.

However, the same API key, endpoint, API version, request format, and blocklist names produce different results depending on the backend cluster:

Successful request:

Cluster: hyena-eastus-01
Status: 200
Request ID: 9aed0b3a-b73f-4c1b-8572-ba57e53b95e7

Failing request:

Cluster: hyena-eastus-02
Status: 400
Error: Blocklist with name Drugs not found, index = 0
Request ID: 38e0d260-40db-478f-89f9-5fa13ddc5cad

The failing response is:

{
  "error": {
    "code": "InvalidRequestBody",
    "message": "Blocklist with name Drugs not found, index = 0",
    "details": []
  }
}

The successful request returns normal analysis results:

{
  "blocklistsMatch": [],
  "categoriesAnalysis": [
    {"category": "Hate", "severity": 0},
    {"category": "SelfHarm", "severity": 0},
    {"category": "Sexual", "severity": 0},
    {"category": "Violence", "severity": 0}
  ]
}

The blocklist listing API returns all three lists, including Drugs, Gambling, and Illegal_Content. The issue appears to be inconsistent blocklist replication or availability between hyena-eastus-01 and hyena-eastus-02.

Please investigate and synchronize the blocklist configuration across the East US backend clusters.

Screenshot 2026-09-01 at 8.54.34 AM

Screenshot 2026-09-01 at 8.55.34 AM

Here is the sample queries by curl


  junedkhan@Juneds-MacBook-Air-2 Downloads % 
curl -i -X POST \
  -H "Ocp-Apim-Subscription-Key: sssss" \
  -H "Content-Type: application/json" \
  "<endpoint>contentsafety/text:analyze?api-version=2024-09-15-preview" \
  --data-raw '{
    "text": "Cold Drink Tax: Expert On Why Fanta In UK Has Less Sugar Than In IndiaA can of Fanta in the UK contains 63 calories while the version sold in India has three times as much sugar.", 
    "blocklistNames": ["Drugs", "Gambling", "Illegal_Content"],
    "haltOnBlocklistHit": false
  }'
HTTP/2 400 
content-type: application/json
date: Tue, 01 Sep 2026 03:14:17 GMT
server: istio-envoy
apim-request-id: 38e0d260-40db-478f-89f9-5fa13ddc5cad
csp-billing-usage: CognitiveServices.ContentSafety.Text:Analyze=1
api-supported-versions: 2023-04-30-preview,2023-05-30-preview,2023-10-01,2023-10-15-preview,2023-10-30-preview,2024-02-15-preview,2024-03-10-preview,2024-03-30-preview,2024-09-01,2024-09-15-preview,2024-09-30-preview,2025-09-15-preview,2026-07-01-preview
azureml-served-by-cluster: hyena-eastus-02
strict-transport-security: max-age=31536000; includeSubDomains; preload
x-content-type-options: nosniff
x-ms-region: East US

{"error":{"code":"InvalidRequestBody","message":"Blocklist with name Drugs not found, index = 0 | Request Id: 38e0d260-40db-478f-89f9-5fa13ddc5cad, Timestamp: 2026-09-01T03:14:17Z.","details":[]}}%                                                                                                                                                                                             





junedkhan@Juneds-MacBook-Air-2 Downloads % curl -i -X POST \
  -H "Ocp-Apim-Subscription-Key: sssss" \
  -H "Content-Type: application/json" \
  "<endpoint>/contentsafety/text:analyze?api-version=2024-09-15-preview" \
  --data-raw '{
    "text": "test content",
    "blocklistNames": ["Drugs", "Gambling", "Illegal_Content"],
    "haltOnBlocklistHit": false
  }'
HTTP/2 200 
content-type: application/json; charset=utf-8
date: Tue, 01 Sep 2026 03:14:34 GMT
server: istio-envoy
apim-request-id: 9aed0b3a-b73f-4c1b-8572-ba57e53b95e7
csp-billing-usage: CognitiveServices.ContentSafety.Text:Analyze=1
api-supported-versions: 2023-04-30-preview,2023-05-30-preview,2023-10-01,2023-10-15-preview,2023-10-30-preview,2024-02-15-preview,2024-03-10-preview,2024-03-30-preview,2024-09-01,2024-09-15-preview,2024-09-30-preview,2025-09-15-preview,2026-07-01-preview
azureml-served-by-cluster: hyena-eastus-01
strict-transport-security: max-age=31536000; includeSubDomains; preload
x-content-type-options: nosniff
x-ms-region: East US

{"blocklistsMatch":[],"categoriesAnalysis":[{"category":"Hate","severity":0},{"category":"SelfHarm","severity":0},{"category":"Sexual","severity":0},{"category":"Violence","severity":0}]}%

Thank you.

Ganesh Gurram 7,570 Reputation points Microsoft External Staff Moderator

2026-09-01T09:44:49.54+00:00

Hi @JUNED KHAN

We are checking with our backend team on this issue, and we will get back to you soon with an update.

Thank you.
Ganesh Gurram 7,570 Reputation points Microsoft External Staff Moderator

2026-09-07T05:43:04.1766667+00:00

@JUNED KHAN - Could you please retry the operation now and do let us know if the issue still persists?

Thank you!
Ganesh Gurram 7,570 Reputation points Microsoft External Staff Moderator

2026-09-10T04:00:51.0366667+00:00

@JUNED KHAN - We haven’t heard from you on the last response and was just checking back to see if you have a resolution yet. In case if you have any resolution please do share that same with the community as it can be helpful to others. Otherwise, will respond with more details and we will try to help.

2 answers

Your answer

Ganesh Gurram 7,570 Reputation points Microsoft External Staff Moderator

2026-09-01T09:44:49.54+00:00

Hi @JUNED KHAN

We are checking with our backend team on this issue, and we will get back to you soon with an update.

Thank you.
Ganesh Gurram 7,570 Reputation points Microsoft External Staff Moderator

2026-09-07T05:43:04.1766667+00:00

@JUNED KHAN - Could you please retry the operation now and do let us know if the issue still persists?

Thank you!
Ganesh Gurram 7,570 Reputation points Microsoft External Staff Moderator

2026-09-10T04:00:51.0366667+00:00

@JUNED KHAN - We haven’t heard from you on the last response and was just checking back to see if you have a resolution yet. In case if you have any resolution please do share that same with the community as it can be helpful to others. Otherwise, will respond with more details and we will try to help.

Answer 1

Hi @JUNED KHAN

Glad to know that the original block-list issue has been resolved.

Regarding the new Content Safety error, the logs indicate a 500 InternalError with the message “Service unavailable. Please try again later.” This is different from the previously reported block-list issue.

As a few troubleshooting steps, you can try the following:

Retry the request when the 500 error occurs. Microsoft documentation identifies 500/503 responses as transient failures where retrying with exponential backoff is recommended.
Capture the Request ID and timestamp for each failed request. These are important for correlating the failure with the service-side telemetry.
Check whether the issue is intermittent or consistently reproducible by retrying the same request with the same endpoint and configuration.
Verify the Content Safety endpoint and API version being used. The Content Safety Analyze Text API requires a valid Content Safety endpoint and supported API version.
Check the request size against the documented limits. For example, the Analyze Text API has a default maximum input length of 10K characters.
If the issue continues, please share a recent failed Request ID, UTC timestamp, HTTP status code, region, and API version. These details will help with further investigation.

For reference, Microsoft documentation:

I Hope this helps. Do let me know if you have any further queries.

Answer 2

@Ganesh Gurram

Thanks for answering as i reveiw my logs i did not see the error in last 7 Days regarding block list but i am getting new Error
Here is the logs can you please review with that request ID why i am getting that error. I have investigate on my production i did not found any issue during testing but some time that is happen and getting that error log

ContentSafety error: ContentSafety API call failed:

Context:

{
  "error": {
    "code": "InternalError",
    "message": "Service unavailable. Please try again later. | Request Id: 4cdd66bf-55c1-4fa2-9977-a171741bf556, Timestamp: 2026-09-19T11:46:36Z.",
    "details": []
  }
}

ContentSafety error: ContentSafety API call failed:

Context:

{
  "error": {
    "code": "InternalError",
    "message": "Service unavailable. Please try again later. | Request Id: 4cdd66bf-55c1-4fa2-9977-a171741bf556, Timestamp: 2026-09-19T11:46:36Z.",
    "details": []
  }
}

ContentSafety API error

Context:

{
  "status": 500,
  "body": "{\"error\":{\"code\":\"InternalError\",\"message\":\"Service unavailable. Please try again later. | Request Id: 4cdd66bf-55c1-4fa2-9977-a171741bf556, Timestamp: 2026-09-19T11:46:36Z.\",\"details\":[]}}"
}