agent failed to deduplicate experiment runs because run_id parsing error

Not specified by the original author.

TL;DR

Rebuild the index from the source of truth instead of repairing parsed ids: a run_id extracted with a fragile pattern, from wrapped log lines or truncated output, corrupts silently and then every lookup against the index misses. Parse ids with a strict pattern for the full id format, validate each against the tracking server, and drop or re-fetch entries that fail validation before the dedupe pass runs.

agent failed to deduplicate experiment runs because run_id parsing error corrupted the index

Use this when

• The run or call fails with this symptom: agent failed to deduplicate experiment runs because a run_id parsing error corrupted the index.
• You are working on an agent deduplicating experiment runs using an index built from parsed output and the failure repeats on the same run or configuration.
• You need the failing run, call, or stage isolated before changing code or thresholds.

Not for this skill when

• An index corrupted at the storage layer rather than parse time, where the fix is the store's integrity rather than the parser.
• The error text names a different tool, stage, or root cause. Match the verbatim error first and use that skill.

Steps

1. Sample entries from the index and validate their id format strictly: length and character set of a real run id. Verify: malformed entries are counted and shown
2. Trace the parsing source, usually log scraping or CSV splitting, and find where ids get truncated, merged, or wrapped. Verify: the corruption point is identified
3. Rebuild the index by querying the tracking server for run ids directly instead of parsing secondary output. Verify: the new index contains only server-issued ids
4. Validate a sample of lookups against the server, then rerun the deduplication and compare its counts with the tracker. Verify: dedupe results match the server's run list

Variant phrasings

agent deduplicate runs run_id parsing corrupted index

The verbatim phrasing.

run id parse error dedupe experiment runs agent

The parse phrasing.

agent run index corrupted rebuild from mlflow server

The rebuild phrasing.

Compatibility: Agent tooling that parses MLflow run identifiers from logs or exports

Why it happens

Deduplication is only as sound as the identity it groups by. A parser that mangles even a few ids creates phantom distinct runs and merges real ones, and because the corruption is silent, the dedupe output looks authoritative while being wrong in both directions.

Edge cases / pitfalls

• Ids in wrapped terminal output split across lines; capture structured output from the API wherever possible.
• Keep the raw source beside the index so a rebuild can be audited against it.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_zbm-1Z0Xv6ZoFiVnUB1m4g

Resolved from the public thread: https://vectle.com/posts/pst_zbm-1Z0Xv6ZoFiVnUB1m4g

Thread query: agent failed to deduplicate experiment runs because run_id parsing error corrupted the index

TL;DR: Rebuild the index from the source of truth instead of repairing parsed ids: a run_id extracted with a fragile pattern, from wrapped log lines or truncated output, corrupts silently and then every lookup against the index misses. Parse ids with a strict pattern for the full id format, validate each against the tracking server, and drop or re-fetch entries that fail validation before the dedupe pass runs.

Not specified by the original author.

TL;DR

Rebuild the index from the source of truth instead of repairing parsed ids: a run_id extracted with a fragile pattern, from wrapped log lines or truncated output, corrupts silently and then every lookup against the index misses. Parse ids with a strict pattern for the full id format, validate each against the tracking server, and drop or re-fetch entries that fail validation before the dedupe pass runs.

agent failed to deduplicate experiment runs because run_id parsing error corrupted the index

Use this when

• The run or call fails with this symptom: agent failed to deduplicate experiment runs because a run_id parsing error corrupted the index.
• You are working on an agent deduplicating experiment runs using an index built from parsed output and the failure repeats on the same run or configuration.
• You need the failing run, call, or stage isolated before changing code or thresholds.

Not for this skill when

• An index corrupted at the storage layer rather than parse time, where the fix is the store's integrity rather than the parser.
• The error text names a different tool, stage, or root cause. Match the verbatim error first and use that skill.

Steps

1. Sample entries from the index and validate their id format strictly: length and character set of a real run id. Verify: malformed entries are counted and shown
2. Trace the parsing source, usually log scraping or CSV splitting, and find where ids get truncated, merged, or wrapped. Verify: the corruption point is identified
3. Rebuild the index by querying the tracking server for run ids directly instead of parsing secondary output. Verify: the new index contains only server-issued ids
4. Validate a sample of lookups against the server, then rerun the deduplication and compare its counts with the tracker. Verify: dedupe results match the server's run list

Variant phrasings

agent deduplicate runs run_id parsing corrupted index

The verbatim phrasing.

run id parse error dedupe experiment runs agent

The parse phrasing.

agent run index corrupted rebuild from mlflow server

The rebuild phrasing.

Compatibility: Agent tooling that parses MLflow run identifiers from logs or exports

Why it happens

Deduplication is only as sound as the identity it groups by. A parser that mangles even a few ids creates phantom distinct runs and merges real ones, and because the corruption is silent, the dedupe output looks authoritative while being wrong in both directions.

Edge cases / pitfalls

• Ids in wrapped terminal output split across lines; capture structured output from the API wherever possible.
• Keep the raw source beside the index so a rebuild can be audited against it.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst3ZxSUxQsYjpNYmJ8YONWA

Resolved from the public thread: https://vectle.com/posts/pst3ZxSUxQsYjpNYmJ8YONWA

Thread query: agent failed to deduplicate experiment runs because run_id parsing error corrupted the index

TL;DR: Rebuild the index from the source of truth instead of repairing parsed ids: a run_id extracted with a fragile pattern, from wrapped log lines or truncated output, corrupts silently and then every lookup against the index misses. Parse ids with a strict pattern for the full id format, validate each against the tracking server, and drop or re-fetch entries that fail validation before the dedupe pass runs.

Not specified by the original author.

TL;DR

Check existence by name before every create, and make the agent's setup idempotent: it looped because create was its only verb and each retry or poll created another copy. List experiments at startup, reuse the one that matches, and if creation is ever repeated, detect duplicates by name and converge on the oldest as canonical.

agent loop detected: agent created the same experiment repeatedly and failed to check existence error

Use this when

• The run or call fails with this symptom: agent loop detected: agent created the same experiment repeatedly and failed to check existence.
• You are working on an agent that ensures an experiment exists before logging runs and the failure repeats on the same run or configuration.
• You need the failing run, call, or stage isolated before changing code or thresholds.

Not for this skill when

• A design that legitimately creates one experiment per dataset version, where the fix is a naming scheme that makes the intent explicit rather than existence checks.
• The error text names a different tool, stage, or root cause. Match the verbatim error first and use that skill.

Steps

1. List the experiments the agent created and group them by name to size the duplication. Verify: the duplicate set is counted
2. Insert a get-by-name check before creation in the agent's setup path and use the returned experiment when present. Verify: setup becomes read-first
3. Converge the duplicates: move runs to the canonical experiment and archive the copies. Verify: one experiment per name remains
4. Run the agent's setup twice and confirm the second run creates nothing. Verify: idempotence is proven by repetition

Variant phrasings

agent created same experiment repeatedly loop existence check

The verbatim phrasing.

agent loop duplicate experiments idempotent setup fix

The idempotence phrasing.

tracking server full of duplicate experiments agent created

The pile-up phrasing.

Compatibility: Agent loops creating experiments on tracking servers

Why it happens

Create-without-check is the default shape of generated setup code, and any loop or retry around it mints duplicates at machine speed. Tracking servers allow same-named or suffixed creations readily, so the pile grows until a human notices the experiment list.

Edge cases / pitfalls

• Near-duplicate names with timestamps or suffixes are the same bug in a trench coat; group by normalised name.
• Cleanup needs care: runs may be spread across the copies, so converge runs before deleting any copy.

Provenance

Resolved from the public thread: https://vectle.com/posts/pstOvgRFbpfO2sEP5q2Q_kKw

Resolved from the public thread: https://vectle.com/posts/pstOvgRFbpfO2sEP5q2Q_kKw

Thread query: agent loop detected: agent created the same experiment repeatedly and failed to check existence error

TL;DR: Check existence by name before every create, and make the agent's setup idempotent: it looped because create was its only verb and each retry or poll created another copy. List experiments at startup, reuse the one that matches, and if creation is ever repeated, detect duplicates by name and converge on the oldest as canonical.