FAB-1800 peer should not load channel with bad config

https://jira.hyperledger.org/browse/FAB-1800

peer should stop loading the channel but continue to load the next chain.

Also added a panic to the system chaincode if there's no ledger registered
with the chain.

Change-Id: Ia581c70c636c3be21fbb05e9cd01fafe36c91b09
Signed-off-by: Srinivasan Muralidharan <[email protected]>

Author: Srinivasan Muralidharan

core/chaincode/sysccapi.go

@@ -99,6 +99,9 @@ func deploySysCC(chainID string, syscc *SystemChaincode) error {
 	ctxt := context.Background()
 	if !syscc.ChainlessCC {
 		lgr := peer.GetLedger(chainID)
+		if lgr == nil {
+			panic(fmt.Sprintf("syschain %s start up failure - unexpected nil ledger for channel %s", syscc.Name, chainID))
+		}
 		var txsim ledger.TxSimulator
 		if txsim, err = lgr.NewTxSimulator(); err != nil {
 			return err

core/peer/peer.go

@@ -92,8 +92,9 @@ func Initialize(dsProvider func(string) error) {
 		}
 		// Create a chain if we get a valid ledger with config block
 		if err = createChain(cid, ledger, cb); err != nil {
-			peerLogger.Warning("Failed to load chain %s", cid)
+			peerLogger.Warningf("Failed to load chain %s(%s)", cid, err)
 			peerLogger.Debug("Error reloading chain %s with message %s. We continue to the next chain rather than abort.", cid, err)
+			continue
 		}
 
 		// now create the delivery service for this chain