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vmui/logs: fix parsing long _msg values (#6310)

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This PR fixes an issue where parsing long `_msg` values caused errors,
resulting in some log records not being displayed.

The error occurred due to partial processing of strings. In some cases,
a long record could be split into multiple chunks, causing only part of
the record to be processed instead of the entire entry.

#6281

Co-authored-by: Aliaksandr Valialkin <valyala@victoriametrics.com>
This commit is contained in:
Yury Molodov 2024-05-22 21:44:13 +02:00 committed by Aliaksandr Valialkin
parent 04d0dd2542
commit 252a196405
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GPG key ID: 52C003EE2BCDB9EB
2 changed files with 6 additions and 33 deletions
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38
app/vmui/packages/vmui/src/pages/ExploreLogs/hooks/useFetchLogs.ts
View file

@ -35,49 +35,22 @@ export const useFetchLogs = (server: string, query: string, limit: number) => {
};
const fetchLogs = useCallback(async () => {
const limit = Number(options.body.get("limit")) + 1;
const limit = Number(options.body.get("limit"));
setIsLoading(true);
setError(undefined);
try {
const response = await fetch(url, options);
const text = await response.text();
if (!response.ok || !response.body) {
const errorText = await response.text();
setError(errorText);
setError(text);
setLogs([]);
setIsLoading(false);
return;
}
const reader = response.body.getReader();
const decoder = new TextDecoder("utf-8");
const result = [];
while (reader) {
const { done, value } = await reader.read();
if (done) {
// "Stream finished, no more data."
break;
}
const lines = decoder.decode(value, { stream: true }).split("\n");
result.push(...lines);
// Trim result to limit
// This will lose its meaning with these changes:
// https://github.com/VictoriaMetrics/VictoriaMetrics/pull/5778
if (result.length > limit) {
result.splice(0, result.length - limit);
}
if (result.length >= limit) {
// Reached the maximum line limit
reader.cancel();
break;
}
}
const data = result.map(parseLineToJSON).filter(line => line) as Logs[];
const lines = text.split("\n").filter(line => line).slice(0, limit);
const data = lines.map(parseLineToJSON).filter(line => line) as Logs[];
setLogs(data);
} catch (e) {
console.error(e);
@ -96,4 +69,3 @@ export const useFetchLogs = (server: string, query: string, limit: number) => {
fetchLogs,
};
};

1
docs/VictoriaLogs/CHANGELOG.md
View file

@ -33,6 +33,7 @@ according to [these docs](https://docs.victoriametrics.com/VictoriaLogs/QuickSta
* FEATURE: [web UI](https://docs.victoriametrics.com/VictoriaLogs/querying/#web-ui): change time range limitation from `_time` in the expression to `start` and `end` query args.
* BUGFIX: fix `invalid memory address or nil pointer dereference` panic when using [`extract`](https://docs.victoriametrics.com/victorialogs/logsql/#extract-pipe), [`unpack_json`](https://docs.victoriametrics.com/victorialogs/logsql/#unpack_json-pipe) or [`unpack_logfmt`](https://docs.victoriametrics.com/victorialogs/logsql/#unpack_logfmt-pipe) pipes. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6306).
* BUGFIX: [web UI](https://docs.victoriametrics.com/VictoriaLogs/querying/#web-ui): fix an issue where logs with long `_msg` values might not display. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6281).
## [v0.8.0](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v0.8.0-victorialogs)