v0.11.105

Changes

OIDC introspection concurrency crashes (#1435)
Turns out the gjson internal map access for "modifiers" is not thread safe:
tidwall/gjson#173
It accesses a map unsyncronized causing application crashes during RW operations:

fatal error: concurrent map writes
goroutine 4555 [running]:
runtime.throw(0x1041950, 0x15)
	/usr/local/go/src/runtime/panic.go:1116 +0x72 fp=0xc001dc5338 sp=0xc001dc5308 pc=0x434b42
runtime.mapassign_faststr(0xecda00, 0xc000118f60, 0x102fe84, 0x1, 0x0)
	/usr/local/go/src/runtime/map_faststr.go:291 +0x3de fp=0xc001dc53a0 sp=0xc001dc5338 pc=0x41375e
github.com/tidwall/gjson.AddModifier(...)
	/go/pkg/mod/github.com/tidwall/gjson@v1.4.0/gjson.go:2612

This workaround uses Mutex semaphores in order to achieve thread safety, that might be slower however as an improvement the write operation is only conditional now which will be rare.

Docker image

Docker image is available in Zalando's Open Source registry:

docker run -it registry.opensource.zalan.do/pathfinder/skipper:v0.11.105 skipper --help
# arm64
docker run -it registry.opensource.zalan.do/pathfinder/skipper-arm64:v0.11.105 skipper --help
# arm v7 32bit
docker run -it registry.opensource.zalan.do/pathfinder/skipper-armv7:v0.11.105 skipper --help