There are un-joinable pools on shelley_testnet

[piotr-iohk]

Context

Information	-
Version	node: 1.14.2, cardano-wallet bcc0ff009b4695589c107fdf21272a470b2362c0
Platform	Linux, all?
Installation	from source

There are some pools that one cannot join on shelley testnet although they are listed by the wallet:

A pool that is listed on cardano-cli shelley query stake-distribution, but wallet reports as "retired in epoch 5", still it is listed by wallet and cardano-cli in epoch 6:

68657135870b97dc43b06955e62b817a010ae29cbe0987c279a42860

Some pools that are listed by the wallet but not listed on cardano-cli shelley query stake-distribution:

d1ba638f82bb013336f321f6a410f4954ac5bbd6a6f572620fc9bd10
afdac781aac2c6e36dfdf8fb9fc8301afed7450c6b432f00e91a3f96
814c66d7d21c6e4bbe2c94eb6b2c478ad3a8628871d9918b145bbc0f
71ecd0e62138588e3fd8522e42d7685983e0274f1439f4abafa531b2

Steps to Reproduce

1. Join one of the pools above on shelley_testnet

Expected behavior

All pools listed by wallet should be "joinable"

Actual behavior

For all those pools we get:

Code = 500,
Message = {"code":"created_invalid_transaction","message":"That's embarrassing. It looks like I've created an invalid transaction that could not be parsed by the node. 
Here's an error message that may help with debugging: 
ApplyTxError [LedgerFailure (DelegsFailure (DelegateeNotRegisteredDELEG (KeyHash 68657135870b97dc43b06955e62b817a010ae29cbe0987c279a42860)))]"}

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Resolution

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QA

[Anviking]

Summarizing info from Jared:
A pool retiring "in" epoch 5 will:

• Disappear from the stake distribution query at the 6/7 epoch boundary
• Be un-joinable at the 5/6 epoch boundary

[Anviking]

A solution might be to use the work @jonathanknowles now is starting, and ourselves decide, in the DB, which pools to displays or not.

[jonathanknowles]

I suspect this issue is fixed by:

• Prevent staking to a retired pool. #1913
• Exclude retired pools from the ListStakePools API function result. #1945

@piotr-iohk what do you think?

[piotr-iohk]

By brute force test all 268 pools on shelley testnet joinable.