cdc server panic when enable sasl in changefeed config

[sdojjy]

version: 6.5.4

�[31m2023/09/04 11:59:37 [Recovery] 2023/09/04 - 11:59:37 panic recovered:
POST /api/v2/changefeeds HTTP/1.1
Host: kop-v654-ch2-ticdc-0.kop-v654-ch2-ticdc-peer.rigel-playground.svc:8301
Accept: application/json
Accept-Encoding: gzip
Content-Length: 1424
Content-Type: application/json
User-Agent: Go-http-client/1.1
X-Client-Version: v6.5.4


runtime error: invalid memory address or nil pointer dereference
runtime/panic.go:260 (0x451375)
runtime/signal_unix.go:839 (0x451345)
[2023/09/04 11:59:37.710 +05:30] [INFO] [kafka_manager.go:100] ["Background refresh Kafka metadata goroutine exit."] [namespace=] [changefeed=]
[github.com/pingcap/tiflow/pkg/config/sink.go:503](http://github.com/pingcap/tiflow/pkg/config/sink.go:503) (0x2da6eb8)
[github.com/pingcap/tiflow/cdc/sink/codec/common/config.go:147](http://github.com/pingcap/tiflow/cdc/sink/codec/common/config.go:147) (0x2da6ee9)
[github.com/pingcap/tiflow/cdc/sinkv2/util/helper.go:75](http://github.com/pingcap/tiflow/cdc/sinkv2/util/helper.go:75) (0x2ed661d)
[github.com/pingcap/tiflow/cdc/sinkv2/eventsink/mq/kafka_dml_sink.go:114](http://github.com/pingcap/tiflow/cdc/sinkv2/eventsink/mq/kafka_dml_sink.go:114) (0x2ee8064)
[github.com/pingcap/tiflow/cdc/sinkv2/eventsink/factory/factory.go:68](http://github.com/pingcap/tiflow/cdc/sinkv2/eventsink/factory/factory.go:68) (0x2f10938)
[github.com/pingcap/tiflow/cdc/sink/validator.go:63](http://github.com/pingcap/tiflow/cdc/sink/validator.go:63) (0x2f12fd0)
[github.com/pingcap/tiflow/cdc/api/v2/api_helpers.go:215](http://github.com/pingcap/tiflow/cdc/api/v2/api_helpers.go:215) (0x2fac6e5)
[github.com/pingcap/tiflow/cdc/api/v2/changefeed.go:84](http://github.com/pingcap/tiflow/cdc/api/v2/changefeed.go:84) (0x2fb0195)
[github.com/gin-gonic/gin@v1.7.4/context.go:165](http://github.com/gin-gonic/gin@v1.7.4/context.go:165) (0x2f9b301)
[github.com/pingcap/tiflow/cdc/api/middleware/middleware.go:95](http://github.com/pingcap/tiflow/cdc/api/middleware/middleware.go:95) (0x2f9b2bc)
[github.com/gin-gonic/gin@v1.7.4/context.go:165](http://github.com/gin-gonic/gin@v1.7.4/context.go:165) (0x2f9b011)
[github.com/pingcap/tiflow/cdc/api/middleware/middleware.go:64](http://github.com/pingcap/tiflow/cdc/api/middleware/middleware.go:64) (0x2f9affd)
[github.com/gin-gonic/gin@v1.7.4/context.go:165](http://github.com/gin-gonic/gin@v1.7.4/context.go:165) (0x2f9a6d9)
[github.com/pingcap/tiflow/cdc/api/middleware/middleware.go:38](http://github.com/pingcap/tiflow/cdc/api/middleware/middleware.go:38) (0x2f9a6bc)
[github.com/gin-gonic/gin@v1.7.4/context.go:165](http://github.com/gin-gonic/gin@v1.7.4/context.go:165) (0x2f9b4e1)
[github.com/pingcap/tiflow/cdc/api/middleware/middleware.go:103](http://github.com/pingcap/tiflow/cdc/api/middleware/middleware.go:103) (0x2f9b432)
[github.com/gin-gonic/gin@v1.7.4/context.go:165](http://github.com/gin-gonic/gin@v1.7.4/context.go:165) (0x13431a1)
[github.com/gin-gonic/gin@v1.7.4/recovery.go:99](http://github.com/gin-gonic/gin@v1.7.4/recovery.go:99) (0x134318c)
[github.com/gin-gonic/gin@v1.7.4/context.go:165](http://github.com/gin-gonic/gin@v1.7.4/context.go:165) (0x134203d)
[github.com/gin-gonic/gin@v1.7.4/gin.go:489](http://github.com/gin-gonic/gin@v1.7.4/gin.go:489) (0x1341cc5)
[github.com/gin-gonic/gin@v1.7.4/gin.go:445](http://github.com/gin-gonic/gin@v1.7.4/gin.go:445) (0x1341824)
net/http/server.go:2947 (0x73ac0b)
net/http/server.go:1991 (0x735d66)
runtime/asm_amd64.s:1594 (0x46f900)

workaround

add the following section to the config file

[sink.kafka-config.large-message-handle]
large-message-handle-option = "none"