Aias00 opened a new issue, #6581:
URL: https://github.com/apache/shenyu/issues/6581
## Description
`getHeaders` runs on the request thread:
`headers.entrySet().stream().collect(Collectors.toMap(...))` (HashMap),
`String.join(",", entry.getValue())` per header, then `JsonUtils.toJson(map)`
(Gson reflection) per request. The downstream `LogCollector.collect` is async
(buffer queue), but the header capture/JSON is synchronous on the request path.
## Location
```
shenyu-plugin-logging-common/.../utils/LogCollectUtils.java:56-60 (from
AbstractLoggingPlugin.java:108)
```
## Impact
Blocking CPU serialization on the Netty event loop for every logged request;
non-trivial for requests with many headers.
## Suggested fix
Defer serialization to the consumer thread (enqueue the raw `HttpHeaders`
reference and serialize in `AbstractLogCollector.consume`), or cache a
precomputed header-name allowlist.
## Related existing issue(s)
#6512 (gzip per chunk) and #6511 (desensitization leak) are different
defects in the logging plugin.
_Identified during the 2026-08-02 audit; full list in
[`docs/issue-candidates-2026-08-02.md`](docs/issue-candidates-2026-08-02.md)._
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