This exception seems to happen if trafficops hasn't been seeded with the cachegroup(s). Seems to be a race condition that happens infrequently.
```enroller_1 | 2018/08/28 13:25:19 http: panic serving [fc01:9400:1000:8::5]:49740: runtime error: index out of range enroller_1 | goroutine 26 [running]: enroller_1 | net/http.(*conn).serve.func1(0xc420268d20) enroller_1 | /usr/local/go/src/net/http/server.go:1726 +0xd0 enroller_1 | panic(0x861a80, 0xb8e110) enroller_1 | /usr/local/go/src/runtime/panic.go:502 +0x229 enroller_1 | main.(*session).getCachegroupID(0xc42041c1c0, 0x1, 0x0, 0x0) enroller_1 | /go/src/github.com/apache/trafficcontrol/infrastructure/cdn-in-a-box/enroller/enroller.go:155 +0xfb enroller_1 | main.(*session).enrollContainer(0xc42041c1c0, 0xc420306dc0, 0xbbe4c8, 0x0, 0x0, 0xc4201b0780, 0xc42019d300, 0x1, 0x4, 0xc4201b0f00) enroller_1 | /go/src/github.com/apache/trafficcontrol/infrastructure/cdn-in-a-box/enroller/enroller.go:221 +0x4f9 enroller_1 | main.(*session).enrollerHandler.func1(0x957c00, 0xc42024a000, 0xc420294a00) enroller_1 | /go/src/github.com/apache/trafficcontrol/infrastructure/cdn-in-a-box/enroller/enroller.go:325 +0x9b9 enroller_1 | net/http.HandlerFunc.ServeHTTP(0xc42053e000, 0x957c00, 0xc42024a000, 0xc420294a00) enroller_1 | /usr/local/go/src/net/http/server.go:1947 +0x44 enroller_1 | net/http.(*ServeMux).ServeHTTP(0xba0840, 0x957c00, 0xc42024a000, 0xc420294a00) enroller_1 | /usr/local/go/src/net/http/server.go:2337 +0x130 enroller_1 | net/http.serverHandler.ServeHTTP(0xc420544000, 0x957c00, 0xc42024a000, 0xc420294a00) enroller_1 | /usr/local/go/src/net/http/server.go:2694 +0xbc enroller_1 | net/http.(*conn).serve(0xc420268d20, 0x9580c0, 0xc420418700) enroller_1 | /usr/local/go/src/net/http/server.go:1830 +0x651 enroller_1 | created by net/http.(*Server).Serve enroller_1 | /usr/local/go/src/net/http/server.go:2795 +0x27b ``` [ Full content available at: https://github.com/apache/trafficcontrol/pull/2743 ] This message was relayed via gitbox.apache.org for [email protected]
