app state export with simd export panics

[crodriguezvega]

Summary of Bug

App state export CLI command panics. Executing simd export results in the following error:

panic: UnmarshalJSON cannot decode empty bytes

goroutine 1 [running]:
github.com/cosmos/cosmos-sdk/x/params/types.Subspace.Get({{0x102b2968, 0xc000527820}, 0xc00039b5c8, {0x66873f8, 0xc00080e110}, {0x6687448, 0xc00080e410}, {0xc000297340, 0x4, 0x1a}, ...}, ...)
	github.com/cosmos/cosmos-sdk/x/params/types/subspace.go:110 +0x307
github.com/cosmos/cosmos-sdk/x/params/types.Subspace.GetParamSet({{0x102b2968, 0xc000527820}, 0xc00039b5c8, {0x66873f8, 0xc00080e110}, {0x6687448, 0xc00080e410}, {0xc000297340, 0x4, 0x1a}, ...}, ...)
	github.com/cosmos/cosmos-sdk/x/params/types/subspace.go:239 +0x12a
github.com/cosmos/cosmos-sdk/x/auth/keeper.AccountKeeper.GetParams(...)
	github.com/cosmos/cosmos-sdk/x/auth/keeper/params.go:15
github.com/cosmos/cosmos-sdk/x/auth/keeper.AccountKeeper.ExportGenesis({{0x66873f8, 0xc00080f1b0}, {0x102b2968, 0xc000527820}, {{0x102b2968, 0xc000527820}, 0xc00039b5c8, {0x66873f8, 0xc00080e110}, {0x6687448, ...}, ...}, ...}, ...)
	github.com/cosmos/cosmos-sdk/x/auth/keeper/genesis.go:31 +0xee
github.com/cosmos/cosmos-sdk/x/auth.AppModule.ExportGenesis({{}, {{0x66873f8, 0xc00080f1b0}, {0x102b2968, 0xc000527820}, {{0x102b2968, 0xc000527820}, 0xc00039b5c8, {0x66873f8, 0xc00080e110}, ...}, ...}, ...}, ...)
	github.com/cosmos/cosmos-sdk/x/auth/module.go:154 +0x9b
github.com/cosmos/cosmos-sdk/types/module.(*Manager).ExportGenesis(_, {{0x669c870, 0xc000058078}, {0x66ab440, 0xc0009f3580}, {{0x0, 0x0}, {0x0, 0x0}, 0x0, ...}, ...}, ...)
	github.com/cosmos/cosmos-sdk/types/module/module.go:340 +0x10d
github.com/cosmos/cosmos-sdk/simapp.(*SimApp).ExportAppStateAndValidators(0xc0004a5100, 0x0, {0x7707668, 0x0, 0x0})
	github.com/cosmos/cosmos-sdk/simapp/export.go:33 +0x1eb
github.com/cosmos/cosmos-sdk/simapp/simd/cmd.appCreator.appExport({{{0x66a0c08, 0xc00000ec30}, {0x66b40f8, 0xc000127c30}, {0x66a8088, 0xc00019bcc0}, 0xc00039a7c0}}, {0x669d718, 0xc000412cc0}, {0x66aa9e0, ...}, ...)
	github.com/cosmos/cosmos-sdk/simapp/simd/cmd/root.go:318 +0x36a
github.com/cosmos/cosmos-sdk/server.ExportCmd.func1(0xc0002e8000, {0x7707668?, 0x0?, 0x0?})
	github.com/cosmos/cosmos-sdk/server/export.go:69 +0x35c
github.com/spf13/cobra.(*Command).execute(0xc0002e8000, {0x7707668, 0x0, 0x0})
	github.com/spf13/cobra@v1.4.0/command.go:856 +0x67c
github.com/spf13/cobra.(*Command).ExecuteC(0xc0000c0000)
	github.com/spf13/cobra@v1.4.0/command.go:974 +0x3b4
github.com/spf13/cobra.(*Command).Execute(...)
	github.com/spf13/cobra@v1.4.0/command.go:902
github.com/spf13/cobra.(*Command).ExecuteContext(...)
	github.com/spf13/cobra@v1.4.0/command.go:895
github.com/cosmos/cosmos-sdk/server/cmd.Execute(0x5805340?, {0x0, 0x0}, {0xc0001cfe00, 0x1e})
	github.com/cosmos/cosmos-sdk/server/cmd/execute.go:36 +0x20f
main.main()
	github.com/cosmos/cosmos-sdk/simapp/simd/main.go:15 +0x30

Version

0.45.4, main

Steps to Reproduce

• Build simd
• setup a local chain and run it with simd start
• stop it
• Execute simd export

---

For Admin Use

• Not duplicate issue
• Appropriate labels applied
• Appropriate contributors tagged
• Contributor assigned/self-assigned

[alexanderbez]

Please post your genesis file :)

[crodriguezvega]

Thanks, @alexanderbez. Here it is: genesis.json.zip

[Jagadeeshkumar748]

I followed the above steps in main version .
If you have used ./simd start to start, then block height will not catch up, so ./simd export will give the above error.
Note: The current main branch needs to start with mode validator.
use:
./simd start --mode validator to start the chain then ./simd export will give the intended output.

[colin-axner]

Using ibc-go binaries with SDK v0.45.4 and v0.45.6, I was able to export without issue.

@crodriguezvega did you verify that the chain had successfully started? I think the param stores don't get properly set until after init genesis. I think this issue needs more information to determine why you received a panic

[tac0turtle]

closing this issue since we were unable to reproduce