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Edge segmentation intermittently returns EXEG‑0203‑502 and empty segment destinations in AEP

Last update: Mon Feb 09 2026 00:00:00 GMT+0000 (Coordinated Universal Time)

In Adobe Experience Platform, Edge Segmentation triggers intermittent EXEG‑0203‑502 service call failures and empty segment destinations during Web SDK interact calls. The issue appears randomly and resolves without configuration changes after some monitoring. To fix this issue, validate datastream settings and confirm stable evaluation behavior.

Description description

Environment

  • Product: Adobe Experience Platform
  • Instance: Production sandbox
  • Constraints: Edge Segmentation and Edge Destinations enabled

Issue/Symptoms

  • Edge Segmentation intermittently returns the error code EXEG‑0203‑502 (“The service call has failed” / “error occurred while calling com.adobe.exp.segmentation”) for Web SDK interact calls, and some responses return HTTP 207 with empty destinations.
  • Some responses show empty segments for the same session and user, with the behavior occurring at random intervals, sometimes affecting most calls before resolving without intervention.

Note

  • EXEG‑0203‑502 indicates an internal Edge Segmentation service call failure (platform/backend).
  • HTTP 207 (Multi‑Status) indicates partial request processing, where some sub‑operations succeed and others do not. Empty destinations may be returned as part of this response and do not necessarily indicate a fatal request failure.

Resolution resolution

To fix this issue, follow these steps:

  1. Check the AEP System Status at https://status.adobe.com/.

  2. Monitor the environment to determine whether intermittent errors persist.

  3. Confirm that Edge Segmentation and Edge Destinations remain enabled in the datastream settings. Learn more in Edge segmentation guide.

  4. Review any recent changes to datastreams, including creation, updates, deactivation, or environment switches.

  5. Verify that all required datastreams are active and properly set up for production.

    Note: If the issue resolves without further action observed after daily testing, no additional steps are required.

  6. Verify by checking that Web SDK interact calls consistently return expected segment destinations without error codes or empty segments. Learn more in Configure a datastream.

Note

  • Edge Segmentation returns 502 errors (EXEG-0203-502) when the internal call fails due to transient backend pressure or aggressive timeouts during higher event frequency. Historical patterns for similar issues suggest that rapid or concurrent events, especially those triggered by Target calls, can cause these intermittent failures.
  • Higher event frequency refers to bursty traffic (many interact calls in a short time window) or sustained event volume significantly above the normal baseline for the datastream.
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