fix: deadlock when querying group members (backport #12342)

x/group/internal/orm/indexer.go

@@ -129,10 +129,8 @@ func uniqueKeysAddFunc(store sdk.KVStore, secondaryIndexKey interface{}, rowID R
 		return sdkerrors.Wrap(errors.ErrORMInvalidArgument, "empty index key")
 	}
 
-	it := store.Iterator(PrefixRange(secondaryIndexKeyBytes))
-	defer it.Close()
-	if it.Valid() {
-		return errors.ErrORMUniqueConstraint
+	if err := checkUniqueIndexKey(store, secondaryIndexKeyBytes); err != nil {
+		return err
 	}
 
 	indexKey, err := buildKeyFromParts([]interface{}{secondaryIndexKey, []byte(rowID)})
@@ -144,6 +142,16 @@ func uniqueKeysAddFunc(store sdk.KVStore, secondaryIndexKey interface{}, rowID R
 	return nil
 }
 
+// checkUniqueIndexKey checks that the given secondary index key is unique
+func checkUniqueIndexKey(store sdk.KVStore, secondaryIndexKeyBytes []byte) error {
+	it := store.Iterator(PrefixRange(secondaryIndexKeyBytes))
+	defer it.Close()
+	if it.Valid() {
+		return errors.ErrORMUniqueConstraint
+	}
+	return nil
+}
+
 // multiKeyAddFunc allows multiple entries for a key
 func multiKeyAddFunc(store sdk.KVStore, secondaryIndexKey interface{}, rowID RowID) error {
 	secondaryIndexKeyBytes, err := keyPartBytes(secondaryIndexKey, false)

x/group/internal/orm/table.go

@@ -170,9 +170,7 @@ func (a table) Has(store sdk.KVStore, key RowID) bool {
 		return false
 	}
 	pStore := prefix.NewStore(store, a.prefix[:])
-	it := pStore.Iterator(PrefixRange(key))
-	defer it.Close()
-	return it.Valid()
+	return pStore.Has(key)
 }
 
 // GetOne load the object persisted for the given RowID into the dest parameter.
@@ -252,11 +250,9 @@ func (a table) Export(store sdk.KVStore, dest ModelSlicePtr) (uint64, error) {
 // data should be a slice of structs that implement PrimaryKeyed.
 func (a table) Import(store sdk.KVStore, data interface{}, _ uint64) error {
 	// Clear all data
-	pStore := prefix.NewStore(store, a.prefix[:])
-	it := pStore.Iterator(nil, nil)
-	defer it.Close()
-	for ; it.Valid(); it.Next() {
-		if err := a.Delete(store, it.Key()); err != nil {
+	keys := a.keys(store)
+	for _, key := range keys {
+		if err := a.Delete(store, key); err != nil {
 			return err
 		}
 	}
@@ -282,6 +278,18 @@ func (a table) Import(store sdk.KVStore, data interface{}, _ uint64) error {
 	return nil
 }
 
+func (a table) keys(store sdk.KVStore) [][]byte {
+	pStore := prefix.NewStore(store, a.prefix[:])
+	it := pStore.Iterator(nil, nil)
+	defer it.Close()
+
+	var keys [][]byte
+	for ; it.Valid(); it.Next() {
+		keys = append(keys, it.Key())
+	}
+	return keys
+}
+
 // typeSafeIterator is initialized with a type safe RowGetter only.
 type typeSafeIterator struct {
 	store     sdk.KVStore

x/group/internal/orm/types.go

@@ -113,12 +113,12 @@ func NewTypeSafeRowGetter(prefixKey [2]byte, model reflect.Type, cdc codec.Codec
 		}
 
 		pStore := prefix.NewStore(store, prefixKey[:])
-		it := pStore.Iterator(PrefixRange(rowID))
-		defer it.Close()
-		if !it.Valid() {
+		bz := pStore.Get(rowID)
+		if len(bz) == 0 {
 			return sdkerrors.ErrNotFound
 		}
-		return cdc.Unmarshal(it.Value(), dest)
+
+		return cdc.Unmarshal(bz, dest)
 	}
 }
 

x/group/keeper/keeper.go

@@ -223,12 +223,12 @@ func (k Keeper) GetGroupSequence(ctx sdk.Context) uint64 {
 	return k.groupTable.Sequence().CurVal(ctx.KVStore(k.key))
 }
 
-// iterateProposalsByVPEnd iterates over all proposals whose voting_period_end is after the `endTime` time argument.
-func (k Keeper) iterateProposalsByVPEnd(ctx sdk.Context, endTime time.Time, cb func(proposal group.Proposal) (bool, error)) error {
+// proposalsByVPEnd returns all proposals whose voting_period_end is after the `endTime` time argument.
+func (k Keeper) proposalsByVPEnd(ctx sdk.Context, endTime time.Time) (proposals []group.Proposal, err error) {
 	timeBytes := sdk.FormatTimeBytes(endTime)
 	it, err := k.proposalsByVotingPeriodEnd.PrefixScan(ctx.KVStore(k.key), nil, timeBytes)
 	if err != nil {
-		return err
+		return proposals, err
 	}
 	defer it.Close()
 
@@ -248,19 +248,12 @@ func (k Keeper) iterateProposalsByVPEnd(ctx sdk.Context, endTime time.Time, cb f
 			break
 		}
 		if err != nil {
-			return err
-		}
-
-		stop, err := cb(proposal)
-		if err != nil {
-			return err
-		}
-		if stop {
-			break
+			return proposals, err
 		}
+		proposals = append(proposals, proposal)
 	}
 
-	return nil
+	return proposals, nil
 }
 
 // pruneProposal deletes a proposal from state.
@@ -279,76 +272,101 @@ func (k Keeper) pruneProposal(ctx sdk.Context, proposalID uint64) error {
 // abortProposals iterates through all proposals by group policy index
 // and marks submitted proposals as aborted.
 func (k Keeper) abortProposals(ctx sdk.Context, groupPolicyAddr sdk.AccAddress) error {
-	proposalIt, err := k.proposalByGroupPolicyIndex.Get(ctx.KVStore(k.key), groupPolicyAddr.Bytes())
+	proposals, err := k.proposalsByGroupPolicy(ctx, groupPolicyAddr)
 	if err != nil {
 		return err
 	}
+
+	for _, proposalInfo := range proposals {
+		// Mark all proposals still in the voting phase as aborted.
+		if proposalInfo.Status == group.PROPOSAL_STATUS_SUBMITTED {
+			proposalInfo.Status = group.PROPOSAL_STATUS_ABORTED
+
+			if err := k.proposalTable.Update(ctx.KVStore(k.key), proposalInfo.Id, &proposalInfo); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+// proposalsByGroupPolicy returns all proposals for a given group policy.
+func (k Keeper) proposalsByGroupPolicy(ctx sdk.Context, groupPolicyAddr sdk.AccAddress) ([]group.Proposal, error) {
+	proposalIt, err := k.proposalByGroupPolicyIndex.Get(ctx.KVStore(k.key), groupPolicyAddr.Bytes())
+	if err != nil {
+		return nil, err
+	}
 	defer proposalIt.Close()
 
+	var proposals []group.Proposal
 	for {
 		var proposalInfo group.Proposal
 		_, err = proposalIt.LoadNext(&proposalInfo)
 		if errors.ErrORMIteratorDone.Is(err) {
 			break
 		}
 		if err != nil {
-			return err
+			return proposals, err
 		}
 
-		// Mark all proposals still in the voting phase as aborted.
-		if proposalInfo.Status == group.PROPOSAL_STATUS_SUBMITTED {
-			proposalInfo.Status = group.PROPOSAL_STATUS_ABORTED
-
-			if err := k.proposalTable.Update(ctx.KVStore(k.key), proposalInfo.Id, &proposalInfo); err != nil {
-				return err
-			}
-		}
+		proposals = append(proposals, proposalInfo)
 	}
-	return nil
+	return proposals, nil
 }
 
 // pruneVotes prunes all votes for a proposal from state.
 func (k Keeper) pruneVotes(ctx sdk.Context, proposalID uint64) error {
-	store := ctx.KVStore(k.key)
-	it, err := k.voteByProposalIndex.Get(store, proposalID)
+	votes, err := k.votesByProposal(ctx, proposalID)
 	if err != nil {
 		return err
 	}
+
+	for _, v := range votes {
+		err = k.voteTable.Delete(ctx.KVStore(k.key), &v)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// votesByProposal returns all votes for a given proposal.
+func (k Keeper) votesByProposal(ctx sdk.Context, proposalID uint64) ([]group.Vote, error) {
+	it, err := k.voteByProposalIndex.Get(ctx.KVStore(k.key), proposalID)
+	if err != nil {
+		return nil, err
+	}
 	defer it.Close()
 
+	var votes []group.Vote
 	for {
 		var vote group.Vote
 		_, err = it.LoadNext(&vote)
 		if errors.ErrORMIteratorDone.Is(err) {
 			break
 		}
 		if err != nil {
-			return err
-		}
-
-		err = k.voteTable.Delete(store, &vote)
-		if err != nil {
-			return err
+			return votes, err
 		}
+		votes = append(votes, vote)
 	}
-
-	return nil
+	return votes, nil
 }
 
 // PruneProposals prunes all proposals that are expired, i.e. whose
 // `voting_period + max_execution_period` is greater than the current block
 // time.
 func (k Keeper) PruneProposals(ctx sdk.Context) error {
-	err := k.iterateProposalsByVPEnd(ctx, ctx.BlockTime().Add(-k.config.MaxExecutionPeriod), func(proposal group.Proposal) (bool, error) {
+	proposals, err := k.proposalsByVPEnd(ctx, ctx.BlockTime().Add(-k.config.MaxExecutionPeriod))
+	if err != nil {
+		return nil
+	}
+	for _, proposal := range proposals {
 		err := k.pruneProposal(ctx, proposal.Id)
 		if err != nil {
-			return true, err
+			return err
 		}
-
-		return false, nil
-	})
-	if err != nil {
-		return err
 	}
 
 	return nil
@@ -358,36 +376,39 @@ func (k Keeper) PruneProposals(ctx sdk.Context) error {
 // has ended, tallies their votes, prunes them, and updates the proposal's
 // `FinalTallyResult` field.
 func (k Keeper) TallyProposalsAtVPEnd(ctx sdk.Context) error {
-	return k.iterateProposalsByVPEnd(ctx, ctx.BlockTime(), func(proposal group.Proposal) (bool, error) {
+	proposals, err := k.proposalsByVPEnd(ctx, ctx.BlockTime())
+	if err != nil {
+		return nil
+	}
+	for _, proposal := range proposals {
 		policyInfo, err := k.getGroupPolicyInfo(ctx, proposal.GroupPolicyAddress)
 		if err != nil {
-			return true, sdkerrors.Wrap(err, "group policy")
+			return sdkerrors.Wrap(err, "group policy")
 		}
 
 		electorate, err := k.getGroupInfo(ctx, policyInfo.GroupId)
 		if err != nil {
-			return true, sdkerrors.Wrap(err, "group")
+			return sdkerrors.Wrap(err, "group")
 		}
 
-		proposalId := proposal.Id
 		if proposal.Status == group.PROPOSAL_STATUS_ABORTED || proposal.Status == group.PROPOSAL_STATUS_WITHDRAWN {
-			if err := k.pruneProposal(ctx, proposalId); err != nil {
-				return true, err
+			proposalID := proposal.Id
+			if err := k.pruneProposal(ctx, proposalID); err != nil {
+				return err
 			}
-			if err := k.pruneVotes(ctx, proposalId); err != nil {
-				return true, err
+			if err := k.pruneVotes(ctx, proposalID); err != nil {
+				return err
 			}
 		} else {
 			err = k.doTallyAndUpdate(ctx, &proposal, electorate, policyInfo)
 			if err != nil {
-				return true, sdkerrors.Wrap(err, "doTallyAndUpdate")
+				return sdkerrors.Wrap(err, "doTallyAndUpdate")
 			}
 
 			if err := k.proposalTable.Update(ctx.KVStore(k.key), proposal.Id, &proposal); err != nil {
-				return true, sdkerrors.Wrap(err, "proposal update")
+				return sdkerrors.Wrap(err, "proposal update")
 			}
 		}
-
-		return false, nil
-	})
+	}
+	return nil
 }

x/group/keeper/keeper_test.go

@@ -85,6 +85,40 @@ func TestKeeperTestSuite(t *testing.T) {
 	suite.Run(t, new(TestSuite))
 }
 
+// Testing a deadlock issue when querying group members
+// https://github.com/cosmos/cosmos-sdk/issues/12111
+func (s *TestSuite) TestCreateGroupWithLotsOfMembers() {
+	for i := 50; i < 70; i++ {
+		membersResp := s.createGroupAndGetMembers(i)
+		s.Require().Equal(len(membersResp), i)
+	}
+}
+
+func (s *TestSuite) createGroupAndGetMembers(numMembers int) []*group.GroupMember {
+	addressPool := simapp.AddTestAddrsIncremental(s.app, s.sdkCtx, numMembers, sdk.NewInt(30000000))
+	members := make([]group.MemberRequest, numMembers)
+	for i := 0; i < len(members); i++ {
+		members[i] = group.MemberRequest{
+			Address: addressPool[i].String(),
+			Weight:  "1",
+		}
+	}
+
+	g, err := s.keeper.CreateGroup(s.ctx, &group.MsgCreateGroup{
+		Admin:   members[0].Address,
+		Members: members,
+	})
+	s.Require().NoErrorf(err, "failed to create group with %d members", len(members))
+	s.T().Logf("group %d created with %d members", g.GroupId, len(members))
+
+	groupMemberResp, err := s.keeper.GroupMembers(s.ctx, &group.QueryGroupMembersRequest{GroupId: g.GroupId})
+	s.Require().NoError(err)
+
+	s.T().Logf("got %d members from group %d", len(groupMemberResp.Members), g.GroupId)
+
+	return groupMemberResp.Members
+}
+
 func (s *TestSuite) TestCreateGroup() {
 	addrs := s.addrs
 	addr1 := addrs[0]