CDC "/status" API may cause panic

[overvenus]

What did you do?

│[2022/08/16 18:35:57.674 +05:30] [INFO] [version.go:47] ["Welcome to Change Data Capture (CDC)"] [release-version=v6.1.0-20220812] [git-hash=b3cd5a49c75ceca1faeae6f6f9f3a1c03fb071eb] [git-branch=heads/refs/tags/v6.1.0-20220812] [utc-build-time="2022-08-12 11:56:07"] [go│
│[2022/08/16 18:35:57.674 +05:30] [INFO] [server.go:78] ["creating CDC server"] [pd="[http://lockin-cm-ch-pd:2379]"] [config="{\"addr\":\"0.0.0.0:8301\",\"advertise-addr\":\"lockin-cm-ch-ticdc-3.lockin-cm-ch-ticdc-peer.rigel-clusters-prod.svc:8301\",\"log-file\":\"/dev/s│
│[2022/08/16 18:35:58.411 +05:30] [INFO] [server.go:320] ["/ticdc/data is set as data-dir (62GB available), sort-dir=/ticdc/data/tmp/sorter. It is recommended that the disk for data-dir at least have 500GB available space"]                                                │
│[2022/08/16 18:35:58.412 +05:30] [INFO] [server.go:199] ["http server is running"] [addr=0.0.0.0:8301]                                                                                                                                                                        │
│2022/08/16 18:35:58 http: panic serving 10.39.136.210:51186: runtime error: invalid memory address or nil pointer dereference                                                                                                                                                 │
│goroutine 224 [running]:                                                                                                                                                                                                                                                      │
│net/http.(*conn).serve.func1()                                                                                                                                                                                                                                                │
│       net/http/server.go:1825 +0xbf                                                                                                                                                                                                                                          │
│panic({0x2dcea20, 0x647e000})                                                                                                                                                                                                                                                 │
│       runtime/panic.go:844 +0x258                                                                                                                                                                                                                                            │
│github.com/pingcap/tiflow/cdc/capture.(*Capture).Info(0x27?)                                                                                                                                                                                                                  │
│       github.com/pingcap/tiflow/cdc/capture/capture.go:321 +0x8c                                                                                                                                                                                                             │
│github.com/pingcap/tiflow/cdc/api.(*statusAPI).handleStatus(0xc000944848, {0x7fc681959868, 0xc000d16100}, 0xc000b82000?)                                                                                                                                                      │
│       github.com/pingcap/tiflow/cdc/api/status.go:77 +0xf0                                                                                                                                                                                                                   │
│github.com/gin-gonic/gin.WrapF.func1(0xc000d16100)                                                                                                                                                                                                                            │
│       github.com/gin-gonic/gin@v1.7.4/utils.go:41 +0x59                                                                                                                                                                                                                      │
│github.com/gin-gonic/gin.(*Context).Next(...)                                                                                                                                                                                                                                 │
│       github.com/gin-gonic/gin@v1.7.4/context.go:165                                                                                                                                                                                                                         │
│github.com/gin-gonic/gin.(*Engine).handleHTTPRequest(0xc0002c0340, 0xc000d16100)                                                                                                                                                                                              │
│       github.com/gin-gonic/gin@v1.7.4/gin.go:489 +0x63e                                                                                                                                                                                                                      │
│github.com/gin-gonic/gin.(*Engine).ServeHTTP(0xc0002c0340, {0x3a2d840?, 0xc0006600e0}, 0xc000d16000)                                                                                                                                                                          │
│       github.com/gin-gonic/gin@v1.7.4/gin.go:445 +0x1c5                                                                                                                                                                                                                      │
│net/http.serverHandler.ServeHTTP({0xc000592180?}, {0x3a2d840, 0xc0006600e0}, 0xc000d16000)                                                                                                                                                                                    │
│       net/http/server.go:2916 +0x43b                                                                                                                                                                                                                                         │
│net/http.(*conn).serve(0xc000a640a0, {0x3a2f530, 0xc00055c570})                                                                                                                                                                                                               │
│       net/http/server.go:1966 +0x5d7                                                                                                                                                                                                                                         │
│created by net/http.(*Server).Serve                                                                                                                                                                                                                                           │
│       net/http/server.go:3071 +0x4db                                                                                                                                                                                                                                         │

What did you expect to see?

No panic.

What did you see instead?

Panic.

Versions of the cluster

TiCDC version (execute cdc version):

v6.1.0

[fubinzh]

/severity Major

[nongfushanquan]

/close

[ti-chi-bot]

@nongfushanquan: Closing this issue.

In response to this:

/close

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