* feat(middleware): add panic recovery middleware with TypeFatal error type
Add a global HTTP recovery middleware that catches panics, logs them
with OTel exception semantic conventions via errors.Attr, and returns
a safe user-facing error response. Introduce TypeFatal/CodeFatal for
unrecoverable failures and WithStacktrace to attach pre-formatted
stack traces to errors. Remove redundant per-handler panic recovery
blocks in querier APIs.
* style(errors): keep WithStacktrace call on same line in test
* fix(middleware): replace fmt.Errorf with errors.New in recovery test
* feat(middleware): add request context to panic recovery logs
Capture request body before handler runs and include method, path, and
body in panic recovery logs using OTel semconv attributes. Improve error
message to direct users to GitHub issues or support.
* feat(instrumentation): add OTel exception semantic convention log handler
Add a loghandler.Wrapper that enriches error log records with OpenTelemetry
exception semantic convention attributes (exception.type, exception.code,
exception.message, exception.stacktrace).
- Add errors.Attr() helper for standardized error logging under "exception" key
- Add exception log handler that replaces raw error attrs with structured group
- Wire exception handler into the instrumentation SDK logger chain
- Remove LogValue() from errors.base as the handler now owns structuring
* refactor: replace "error", err with errors.Attr(err) across codebase
Migrate all slog error logging from ad-hoc "error", err key-value pairs
to the standardized errors.Attr(err) helper, enabling the exception log
handler to enrich these logs with OTel semantic convention attributes.
* refactor: enforce attr-only slog style across codebase
Change sloglint from kv-only to attr-only, requiring all slog calls to
use typed attributes (slog.String, slog.Any, etc.) instead of key-value
pairs. Convert all existing kv-style slog calls in non-excluded paths.
* refactor: tighten slog.Any to specific types and standardize error attrs
- Replace slog.Any with slog.String for string values (action, key, where_clause)
- Replace slog.Any with slog.Uint64 for uint64 values (start, end, step, etc.)
- Replace slog.Any("err", err) with errors.Attr(err) in dispatcher and segment analytics
- Replace slog.Any("error", ctx.Err()) with errors.Attr in factory registry
* fix(instrumentation): use Unwrapb message for exception.message
Use the explicit error message (m) from Unwrapb instead of
foundErr.Error(), which resolves to the inner cause's message
for wrapped errors.
* feat(errors): capture stacktrace at error creation time
Store program counters ([]uintptr) in base errors at creation time
using runtime.Callers, inspired by thanos-io/thanos/pkg/errors. The
exception log handler reads the stacktrace from the error instead of
capturing at log time, showing where the error originated.
* fix(instrumentation): apply default log wrappers uniformly in NewLogger
Move correlation, filtering, and exception wrappers into NewLogger so
all call sites (including CLI loggers in cmd/) get them automatically.
* refactor(instrumentation): remove variadic wrappers from NewLogger
NewLogger no longer accepts arbitrary wrappers. The core wrappers
(correlation, filtering, exception) are hardcoded, preventing callers
from accidentally duplicating behavior.
* refactor: migrate remaining "error", <var> to errors.Attr across legacy paths
Replace all remaining "error", <variable> key-value pairs with
errors.Attr(<variable>) in pkg/query-service/ and ee/query-service/
paths that were missed in the initial migration due to non-standard
variable names (res.Err, filterErr, apiErrorObj.Err, etc).
* refactor(instrumentation): use flat exception.* keys instead of nested group
Use flat keys (exception.type, exception.code, exception.message,
exception.stacktrace) instead of a nested slog.Group in the exception
log handler.
This PR fulfills the requirements of #9069 by:
- Adding a golangci-lint directive (forbidigo) to disallow all fmt.Errorf usages.
- Replacing existing fmt.Errorf instances with structured errors from github.com/SigNoz/signoz/pkg/errors for consistent error classification and lint compliance.
- Verified lint and build integrity.
zeekayandGitHub