try a thing

chain/exchange/client.go

@@ -395,7 +395,7 @@ func (c *client) sendRequestToPeer(ctx context.Context, peer peer.ID, req *Reque
 		return nil, xerrors.Errorf("failed to get protocols for peer: %w", err)
 	}
 	if len(supported) == 0 || (supported[0] != BlockSyncProtocolID && supported[0] != ChainExchangeProtocolID) {
-		return nil, xerrors.Errorf("peer %s does not support protocols %s",
+		return nil, xerrors.Errorf("peer %s does not support protocols %s (supported: %s)",
 			peer, []string{BlockSyncProtocolID, ChainExchangeProtocolID})
 	}
 

chain/sync_test.go

@@ -5,9 +5,12 @@ import (
 	"fmt"
 	"os"
 	"strings"
+	"syscall"
 	"testing"
 	"time"
 
+	"golang.org/x/sys/unix"
+
 	"github.com/filecoin-project/go-state-types/crypto"
 
 	"github.com/filecoin-project/go-state-types/network"
@@ -344,6 +347,8 @@ func (tu *syncTestUtil) waitIdentify(from int, pid peer.ID) {
 		}
 
 		if time.Now().After(deadline) {
+			fmt.Printf("peer didn't advertise chain xchg support: %+v\n", epi)
+			unix.Kill(os.Getpid(), syscall.SIGQUIT)
 			tu.t.Fatalf("peer didn't advertise chain xchg support: %+v", epi)
 		}
 

node/modules/services.go

@@ -97,6 +97,7 @@ func RunPeerMgr(mctx helpers.MetricsCtx, lc fx.Lifecycle, pmgr *peermgr.PeerMgr)
 func RunChainExchange(h host.Host, svc exchange.Server) {
 	h.SetStreamHandler(exchange.BlockSyncProtocolID, svc.HandleStream)     // old
 	h.SetStreamHandler(exchange.ChainExchangeProtocolID, svc.HandleStream) // new
+	log.Error("debug - register chain xchg")
 }
 
 func waitForSync(stmgr *stmgr.StateManager, epochs int, subscribe func()) {