An HTTP 500 after upgrading an application can mean the server could not process a request. If the request involves an older session and the opencode-go provider, a decoding problem is one possibility—but the status code alone does not confirm the cause.
This guide offers a cautious way to investigate. The available issue reference identifies the reported scenario, but it does not provide enough technical detail to establish a specific faulty version, migration step, or confirmed fix. Treat the examples below as diagnostic templates, not as a reproduction of that report.
What the symptom means
A session created before an upgrade may contain data that the newer application needs to read. If a request involving that session returns HTTP 500, the failure may be happening while the server loads, converts, or uses the session. Other server-side problems can produce the same status.
Do not assume that every session using opencode-go is affected, or that the provider itself is necessarily at fault. First establish which request fails, which session it concerns, and whether the problem is limited to data created before the upgrade.
Likely causes to check
- Session-format mismatch: The upgraded application may handle a field or shape in an older session differently. Confirm this from release notes or official documentation before changing stored data.
- Incomplete or mismatched upgrade: The running executable, provider integration, and related components may not be from the versions you intended to deploy.
- Provider-specific data: The failing session may include provider-related fields or values that the current code cannot interpret. This is a possibility to investigate, not an established cause.
- Corrupt or incomplete session data: A single malformed record can behave differently from other sessions. Preserve it before attempting any repair.
- Another server-side failure: Configuration, storage access, or an unrelated exception can also lead to HTTP 500. Use server logs to identify the failing operation.
Minimal diagnostic example
Use the same request path your application normally uses to load a session. The placeholders below are illustrative: replace them with the endpoint, session identifier, and authentication method documented for your own installation. Do not assume this is an OpenCode API route.
# Illustrative request template only
curl -i \
-H "Authorization: Bearer $TOKEN" \
"$BASE_URL/$DOCUMENTED_SESSION_ROUTE/$SESSION_ID"Record the response status, approximate time, session identifier, application version, and provider configuration. Avoid sharing tokens, private session contents, or unredacted logs. If you can compare a session created before the upgrade with one created after it, do so without modifying either record.
Safe diagnostic path
1. Confirm the scope
Check whether the failure happens for one session or many, and whether it affects only sessions created before the upgrade. Also note whether requests for other providers or unrelated operations succeed. These comparisons help narrow the investigation, but do not prove a root cause on their own.
2. Identify the exact running versions
Check the version reported by the running process or deployment, not only the version in a package file or build configuration. If the provider is installed or configured separately, record its version and how it is loaded. Compare these details with the upgrade plan and the project's current official documentation.
Version-specific migration behavior can change. The supplied reference does not establish which OpenCode release introduced or fixed a relevant behavior, so do not apply a version-specific workaround based only on this guide.
3. Inspect logs around the failed request
Correlate the request time with server logs. Look for the first relevant error and the operation that failed, such as reading session data or decoding a value. Redact credentials and personal data before sharing logs. An HTTP 500 is not enough to distinguish a decode error from other server failures.
4. Preserve data before testing changes
Back up the affected session data and any related storage using the method supported by your deployment. Keep the original unchanged. Do not delete sessions, edit stored records by hand, or run a guessed migration command against production data.
5. Check official guidance for your exact version
Review the project's release notes, migration instructions, and provider documentation for the versions you identified. The references below include the issue link and the supplied documentation starting point; the available input does not establish what those pages currently say. Verify any proposed command or compatibility claim directly before using it.
6. Test a documented remedy in a safe environment
If official guidance describes a migration or compatibility fix, first try it on a copy or a non-production environment. Use the documented procedure for your installed version. Do not infer that reinstalling, downgrading, or changing session data is safe without checking the project's instructions and your backup plan.
How to verify a fix
- Repeat the same documented session-loading request that previously failed.
- Confirm that the response is successful and the application can use the session as expected.
- Check server logs for errors during the request.
- Test more than one relevant session if you have safe, representative data, including a session created after the upgrade.
- Monitor subsequent requests and retain the backup until the repair is confirmed in your environment.
A successful response for one session does not establish that every older session is compatible. Record the versions and steps used so the result can be reviewed or repeated.
Common follow-up questions
Should I downgrade immediately?
Not without checking the project's supported rollback procedure. A downgrade may not reverse changes already made to stored data. Preserve a backup and confirm compatibility and rollback instructions for the versions involved.
Can I delete the affected session and create another?
Only if losing that session is acceptable and the application's documentation supports the action. Deletion can remove useful data and does not explain the underlying failure. Preserve a copy first, especially if the session is needed for diagnosis.
When the problem remains
Prepare a concise report containing the application and provider versions, the upgrade path, the steps that trigger the error, whether old and new sessions behave differently, and a redacted log excerpt around the failure. Include the smallest safe reproduction you can provide. Do not include secrets or private session data.
References
- OpenCode issue reference supplied for this troubleshooting topic
- Documentation starting point supplied in the record
Confirm current, version-specific behavior in the project's official documentation before applying a migration or modifying stored sessions.
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