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Track intermittent OMP MCP-error observation loss #63

Description

@ericjuta

Status

Known unresolved failure, recorded from the completed synthetic OMP investigation. This issue tracks retained evidence; it does not restart diagnosis or claim a fix. Related to the multi-provider evaluation work in #46.

Revision and native pin

  • Source: 4fa4c6f2578268c60b60c454a3fc1a495dc0b64a on feat/eval-multi-runner.
  • OMP 18.1.14, profile omp-18.1.14-acp-v1.
  • Native executable SHA-256: 27dd66cb6a2c39fff51e1fe6db40f1f376fee4a3d04457f236edaa5d0290e4d2.
  • Harness source SHA-256: c1b9616436067015ebdf2e0a90f9705fd76cdf67af9b4b9d5ca6679b655b68d6.

Recorded failure

In the synthetic mcp-error-anthropic case, the host made one canonical perps.executeSqlQuery MCP call and received a tool error. Native guard evidence reached terminal completion. The evaluator instead returned PluginEvalOmpHarnessProcessError with reason generation-failed and an empty message.

The trial failed closed. It did not report success, but it produced no canonical failed tool observation. The one-sql-observation and kept-canonical-identity assertions therefore failed. The failed row recorded containerGone: false; the attempt's overall cleanup and final resource cleanup were subsequently recorded as successful. This is not a claim of a persistent resource leak.

Investigation already completed

  • Bounded exception instrumentation in a temporary diagnostic source copy.
  • Four diagnostic MCP-error passes, one initial pass and three repeats.
  • One final unchanged-source pass.
  • Those later passes returned observation status failed, error OMP tool execution failed, one canonical SQL observation with MCP tool call failed, and exactly one host MCP call.

The cause remains unknown. Later passes do not establish that the intermittent failure is fixed. No further reruns are part of filing this issue.

Retained evidence fingerprints

Raw summaries and captures remain private; they are not attached to this public issue. These hashes identify the exact retained files, not independent correctness attestations.

Receipt SHA-256
Closeout a20113fc741f6772ddbff07d47e558f9d1277950cdd08b3c6dc1c93d0c2b0a3e
Failed attempt 666e1572 summary ebe3f31dca7decc47abfc33a8c93351b219d3ca0443015ce512b66e057d4f6f2
Final unchanged-source attempt 44a4720d summary fe72d9dbff9c79d454c79699cf276179897f1d19744d1b1cd2fe734489cd7efa

All observations above are synthetic local model/MCP protocol evidence, not paid model behavior, production Gina connectivity or measured acceptance. Paid evaluations require a separately approved milestone. This issue does not authorize them.

Activity

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