app/vmselect: remove data race on updating EvalConfig.IsPartialRespon…

…se from concurrently running goroutines This properly returns `is_partial: true` for partial responses.
jnadler · Mar 12, 2023 · 468de76 · 468de76
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diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
@@ -29,6 +29,7 @@ The following tip changes can be tested by building VictoriaMetrics components f
 * BUGFIX: vmselect: reduce memory usage and CPU usage when performing heavy queries. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3692).
 * BUGFIX: prevent from possible `invalid memory address or nil pointer dereference` panic during [background merge](https://docs.victoriametrics.com/#storage). The issue has been introduced at [v1.85.0](https://docs.victoriametrics.com/CHANGELOG.html#v1850). See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3897).
 * BUGFIX: prevent from possible `SIGBUS` crash on ARM architectures (Raspberry Pi), which deny unaligned access to 8-byte words. Thanks to @oliverpool for narrowing down the issue and for [the initial attempt to fix it](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/3927).
+* BUGFIX: [VictoriaMetrics cluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html): always return `is_partial: true` in partial responses. Previously partial responses could be returned as non-partial in some cases.
 * BUGFIX: [VictoriaMetrics cluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html): properly take into account `-rpc.disableCompression` command-line flag at `vmstorage`. It was ignored since [v1.78.0](https://docs.victoriametrics.com/CHANGELOG.html#v1780). See [this pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/3932).
 * BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): fix panic when [writing data to Kafka](https://docs.victoriametrics.com/vmagent.html#writing-metrics-to-kafka). The panic has been introduced in [v1.88.0](https://docs.victoriametrics.com/CHANGELOG.html#v1880).
 * BUGFIX: [vmui](https://docs.victoriametrics.com/#vmui): stop showing `Please enter a valid Query and execute it` error message on the first load of vmui.