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azure-openai error: The server had an error processing your request - GPT-5.2-chat

Althaf Ali V A 5 Reputation points
2026-04-14T10:09:43.5233333+00:00

Hi Team,

Starting April 13th, 4 PM IST onwards we started seeing weird 408 timeout error for Azure Open AI calls with following error message.

Error Message:

azure-openai error: The server had an error processing your request. Please retry your request. (Request ID [REQUEST ID HIDDEN])

Observations:

Issue started occurring intermittently, especially during peak hours (post ~4 PM IST)

Requests sometimes take a long time and eventually fail with 500 or timeout

No recent changes were made on our application or infrastructure side

Other services are functioning as expected

Configuration Details:

  • Service: Azure OpenAI
  • Model: GPT-5.2-chat (Preview)
  • Deployment Type: Global Standard
  • Region: [East US 2]

Questions:

Are there any known ongoing issues or capacity constraints for GPT-5.x models in this region?

  1. Is this expected behavior for Global Standard deployments under peak load?

Would switching regions or deployment types improve reliability in this case?

Any guidance or confirmation from the Azure team or community would be helpful.

Note: PII redacted at support side for confidentially of customer.

Azure OpenAI in Foundry Models

2 answers

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  1. SRILAKSHMI C 18,745 Reputation points Microsoft External Staff Moderator
    2026-04-14T14:11:52.9033333+00:00

    Hello Althaf Ali V A,

    Thank you for reaching out and for the detailed information.

    Based on your observations and the additional context, the behavior you’re seeing (intermittent 408 timeouts and 5xx errors, especially during peak hours) is consistent with capacity pressure and transient conditions in Global Standard deployments, particularly when using a preview model such as GPT-5.2-chat.

    What is happening

    The combination of:

    • Intermittent failures
    • Increased latency before failure
    • Higher occurrence during post ~4 PM IST (peak hours)
    • No recent changes on your side

    indicates that requests are likely experiencing:

    • Queuing delays
    • Backend contention
    • Timeouts under load

    This is typical of shared-capacity environments under high demand.

    Why this is occurring in your setup

    Your current configuration:

    • Model: GPT-5.2-chat (Preview)
    • Deployment: Global Standard
    • Region: East US 2

    Key characteristics:

    Preview models

    • Do not have strict latency SLAs
    • Operate with shared and evolving capacity
    • More sensitive to traffic spikes

    Global Standard deployments

    • Multi-tenant (shared infrastructure)
    • No guaranteed throughput or latency
    • Can experience:
      • Increased response times
      • Intermittent request failures under load

    Answers to your questions

    1. Are there known issues or capacity constraints?

    There may not always be a publicly reported outage, but Capacity constraints during peak hours are expected behavior for preview models on Global Standard deployments.

    2. Is this expected behavior?

    Yes, given your current configuration, intermittent latency and timeout errors during high-demand periods are expected.

    3. Would switching regions or deployment types help?

    Yes, this would significantly improve reliability.

    Recommended actions

    1. Implement retry logic

    • Handle 408, 429, and 5xx responses
    • Use exponential backoff
    • This is essential for production scenarios

    2. Introduce fallback handling

    • Route failed requests to:
      • A secondary deployment
      • Alternate model/version

    3. Evaluate Provisioned Throughput (PTU)

    For production workloads, this is the recommended approach:

    • Dedicated capacity
    • Predictable latency
    • Eliminates shared pool contention

    4. Consider multi-region deployment

    • Deploy in an additional region
    • Route traffic based on availability

    This helps Reduce regional dependency, Improve resiliency

    5. Monitor service metrics

    Use Azure Monitor to track:

    • Request volume
    • Latency
    • Server errors (5xx)

    Set alerts to proactively detect spikes.

    6. Optimize request patterns

    • Reduce token usage where possible
    • Avoid long-running requests
    • Configure reasonable output limits

    7. Check service health

    Review Azure Service Health, Resource Health for any regional degradation.

    The issue is not caused by your application

    It is due to shared capacity constraints in Global Standard deployments

    More prominent with preview models during peak hours

    Can be mitigated through:

    • Retry logic
    • PTU deployment
    • Multi-region strategy

    The behavior you are observing aligns with expected characteristics of Global Standard deployments under peak demand, particularly for preview models. For improved stability and consistent performance, we recommend implementing retry mechanisms, evaluating Provisioned Throughput deployments, and considering multi-region architecture.

    Please refer this

    Transient Fault Handling guidance: https://learn.microsoft.com/azure/architecture/best-practices/transient-faults

    Azure Monitor overview: https://learn.microsoft.com/azure/azure-monitor/

    Model region availability: https://learn.microsoft.com/azure/ai-foundry/openai/concepts/models#model-summary-table-and-region-availability

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

    Thank you!

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  2. AI answer

    2026-04-14T10:10:07.4966667+00:00

    The behavior described matches transient service-side or capacity issues rather than an application bug, especially given:

    • The errors started suddenly without changes on the application side.
    • They are intermittent and correlate with peak hours.
    • Requests fail with 408/500 and the message “The server had an error processing your request. Please retry your request.”

    From the available guidance:

    1. Handling 408/500 and intermittent failures
    • 408 (timeout) and 5xx errors are treated as transient internal errors and are expected to be retried with exponential backoff.
    • The Azure OpenAI client libraries automatically retry connection errors, 408, 429, and >=500 internal errors twice by default with exponential backoff. This applies to both Python and JavaScript SDKs.
    • If requests fail unexpectedly, recommended actions include:
      • Implementing or tuning retry logic (increasing max_retries / maxRetries).
      • Retrying with smaller prompts to rule out payload-size issues.

    Relevant configuration examples:

    • Python:
    from openai import OpenAI
    client = OpenAI(max_retries=0)  # adjust higher instead of 0 for resilience
    
    client.with_options(max_retries=5).chat.completions.create(
        messages=[{"role": "user", "content": "When was Microsoft founded?"}],
        model="gpt-4o",
    )
    
    • JavaScript/TypeScript:
    const client = new OpenAI({
      maxRetries: 0, // default is 2; increase for more resilience
    });
    
    await client.chat.completions.create(
      { messages: [{ role: 'user', content: '...' }], model: '' },
      { maxRetries: 5 },
    );
    
    1. 500 internal errors and sampling parameters For some 500 errors related to model output (for example, invalid Unicode or unexpected special tokens), recommended mitigations include:
    • Reduce temperature to < 1.
    • Ensure presence/frequency penalties and logit biases are at default values.
    • Optionally set top_p to a lower, non-default value to reduce sampling of low-probability tokens.
    • Always use a client with retry logic and reattempt failed calls.
    1. 408/400 and charging behavior
    • 408 timeouts and some 400 errors (for example, content filter or input limit) can still incur charges because the service performed processing even though the status code is not 200.
    • 401 and 429 errors do not incur charges because the service does not perform processing in those cases.
    1. Global Standard, region, and capacity The provided material does not list specific, current capacity incidents or region-specific issues for GPT-5.x or East US 2, and does not explicitly state that this pattern is “expected” for Global Standard deployments under peak load.

    However, based on similar guidance for other Azure AI services:

    • When intermittent timeouts and 5xx errors appear clustered in time and region, it is consistent with transient regional or capacity issues.
    • Recommended actions in such cases are:
      • Check Azure Status and Service Health in the Azure portal for incidents in the target region.
      • If no incident is reported, test the same workload in a different region to see if the behavior is region-specific.
    1. Whether switching region or deployment type helps From the available guidance for other Azure AI services and regional issues:
    • If the issue is regional (for example, only in West US 2 or a specific region), creating or using a resource in another region can restore normal behavior.
    • This pattern is used as a diagnostic step: if another region works normally under the same load, the problem is likely regional capacity or service-side behavior.

    Given that, for this scenario:

    • It is reasonable to:
      1. Ensure robust retry logic (including for 408/429/5xx) with exponential backoff.
      2. Reduce sampling randomness (temperature, top_p) and reset penalties/logit bias to defaults.
      3. Test the same deployment configuration in another supported region to see if reliability improves.
      4. Monitor Azure Status and Service Health for East US 2 for any incidents affecting Azure OpenAI.

    If the same pattern persists across regions with proper retry logic and conservative sampling parameters, opening a support case with request IDs (like the one provided in the error message) is the next step so the service team can investigate backend issues.


    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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