Error uploading entry to the transparency log

[mayaCostantini]

When signing an artifact with cosign or uploading an entry manually with rekor-cli, the following error occurs:

error processing request	{"requestID": "rekor-server/QXZyBkQeAD-000030", "handler": "entries.CreateLogEntry", "statusCode": 500, "clientMessage": "unexpected result from transparency log", "error": "grpc error: rpc error: code = DeadlineExceeded desc = context canceled"}

No logs are available for the trillian log server.

Traceback (Rekor server):

2023-07-21T14:19:15.293Z	ERROR	api/error.go:72	error processing request	{"requestID": "rekor-server/QXZyBkQeAD-000030", "handler": "entries.CreateLogEntry", "statusCode": 500, "clientMessage": "unexpected result from transparency log", "error": "grpc error: rpc error: code = DeadlineExceeded desc = context canceled"}
github.com/sigstore/rekor/pkg/api.handleRekorAPIError.func1
	github.com/sigstore/rekor/pkg/api/error.go:72
github.com/sigstore/rekor/pkg/api.handleRekorAPIError
	github.com/sigstore/rekor/pkg/api/error.go:117
github.com/sigstore/rekor/pkg/api.createLogEntry
	github.com/sigstore/rekor/pkg/api/entries.go:195
github.com/sigstore/rekor/pkg/api.CreateLogEntryHandler
	github.com/sigstore/rekor/pkg/api/entries.go:311
github.com/sigstore/rekor/pkg/generated/restapi/operations/entries.CreateLogEntryHandlerFunc.Handle
	github.com/sigstore/rekor/pkg/generated/restapi/operations/entries/create_log_entry.go:35
github.com/sigstore/rekor/pkg/generated/restapi/operations/entries.(*CreateLogEntry).ServeHTTP
	github.com/sigstore/rekor/pkg/generated/restapi/operations/entries/create_log_entry.go:71
github.com/sigstore/rekor/pkg/generated/restapi.recordMetricsForAPI.func1.1
	github.com/sigstore/rekor/pkg/generated/restapi/configure_rekor_server.go:222
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2109
github.com/go-openapi/runtime/middleware.NewOperationExecutor.func1
	github.com/go-openapi/[email protected]/middleware/operation.go:28
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2109
github.com/go-openapi/runtime/middleware.NewRouter.func1
	github.com/go-openapi/[email protected]/middleware/router.go:78
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2109
github.com/go-openapi/runtime/middleware.Redoc.func1
	github.com/go-openapi/[email protected]/middleware/redoc.go:72
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2109
github.com/go-openapi/runtime/middleware.Spec.func1
	github.com/go-openapi/[email protected]/middleware/spec.go:46
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2109
github.com/go-chi/chi/middleware.RequestLogger.func1.1
	github.com/go-chi/[email protected]+incompatible/middleware/logger.go:46
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2109
github.com/go-chi/chi/middleware.Recoverer.func1
	github.com/go-chi/[email protected]+incompatible/middleware/recoverer.go:37
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2109
github.com/go-chi/chi/middleware.Heartbeat.func1.1
	github.com/go-chi/[email protected]+incompatible/middleware/heartbeat.go:21
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2109
github.com/sigstore/rekor/pkg/generated/restapi.serveStaticContent.func1
	github.com/sigstore/rekor/pkg/generated/restapi/configure_rekor_server.go:296
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2109
github.com/rs/cors.(*Cors).Handler.func1
	github.com/rs/[email protected]/cors.go:231
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2109
github.com/sigstore/rekor/pkg/generated/restapi.wrapMetrics.func1
	github.com/sigstore/rekor/pkg/generated/restapi/configure_rekor_server.go:266
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2109
github.com/sigstore/rekor/pkg/generated/restapi.setupGlobalMiddleware.func1
	github.com/sigstore/rekor/pkg/generated/restapi/configure_rekor_server.go:207
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2109
github.com/go-chi/chi/middleware.RequestID.func1
	github.com/go-chi/[email protected]+incompatible/middleware/request_id.go:76
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2109
net/http.serverHandler.ServeHTTP
	net/http/server.go:2947
net/http.(*conn).serve
	net/http/server.go:1991
2023-07-21T14:19:15.293Z	DEBUG	api/error.go:75	map[HTTPRequest:0xc000575b00 ProposedEntry:0xc0005920d8]	{"requestID": "rekor-server/QXZyBkQeAD-000030"}
2023-07-21T14:19:15.293Z	INFO	restapi/configure_rekor_server.go:182	[rekor-server/QXZyBkQeAD-000030] "POST http://rekor.ec2.internal/api/v1/log/entries HTTP/1.1" from 10.89.0.19:42848 - 500 65B in 3.003652165s
2023-07-21T14:19:16.312Z	INFO	restapi/configure_rekor_server.go:182	[rekor-server/QXZyBkQeAD-000031] "POST http://rekor.ec2.internal/api/v1/log/entries HTTP/1.1" from 10.89.0.19:42862 - 409 159B in 5.724927ms

Environment: RHEL 9.2