*: Set debug.SetPanicOnFault(true) so we can recover seg faults. (tha…

…nos-io#3498)

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

CHANGELOG.md

@@ -10,7 +10,17 @@ NOTE: As semantic versioning states all 0.y.z releases can contain breaking chan
 
 We use _breaking :warning:_ to mark changes that are not backward compatible (relates only to v0.y.z releases.)
 
-## Unreleased
+## [v0.17.1](https://github.com/thanos-io/thanos/releases/tag/v0.17.1) - 2020.11.24
+
+### Fixed
+
+- [#3480](https://github.com/thanos-io/thanos/pull/3480) Query-frontend: Fixed regression.
+
+### Changed
+
+- [#3498](https://github.com/thanos-io/thanos/pull/3498) Enabled debug.SetPanicOnFault(true) which allow us to recover on queries causing SEG FAULTs (e.g unmmaped memory access).
+
+## [v0.17.0](https://github.com/thanos-io/thanos/releases/tag/v0.17.0) - 2020.11.18
 
 ### Added
 

cmd/thanos/main.go

@@ -11,6 +11,7 @@ import (
 	"os/signal"
 	"path/filepath"
 	"runtime"
+	"runtime/debug"
 	"syscall"
 
 	"github.com/go-kit/kit/log"
@@ -28,6 +29,10 @@ import (
 )
 
 func main() {
+	// We use mmaped resources in most of the components so hardcode PanicOnFault to true. This allows us to recover (if we can e.g if queries
+	// are temporarily accessing unmapped memory).
+	debug.SetPanicOnFault(true)
+
 	if os.Getenv("DEBUG") != "" {
 		runtime.SetMutexProfileFraction(10)
 		runtime.SetBlockProfileRate(10)