[Compatibility]Enabling GRPC encryption causes SCM startup failure.

if (conf.isSecurityEnabled() && conf.isGrpcTlsEnabled()) {
  KeyStoresFactory serverKeyFactory =
      certificateClient.getServerKeyStoresFactory(); 

private X509ExtendedKeyManager loadKeyManager(CertificateClient caClient)
    throws GeneralSecurityException, IOException {
  PrivateKey privateKey = caClient.getPrivateKey();
  List<X509Certificate> newCertList = caClient.getTrustChain(); 

public List<String> updateCAList() throws IOException {
  pemEncodedCACertsLock.lock();
  try {
    pemEncodedCACerts = getScmSecureClient().listCACertificate(); 

10:45:45.506 AM             INFO      SCMRatisServerImpl starting Raft server for scm:7b4b7153-eb02-443b-b8f9-3b146931674c
10:45:47.563 AM             INFO      RetryInvocationHandler com.google.protobuf.ServiceException: java.net.ConnectException: Call From <HOSTNAME>/<IP> to <HOSTNAME>:9961 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused, while invoking $Proxy11.submitRequest over nodeId=node1,nodeAddress=<HOSTNAME>/<IP>:9961 after 1 failover attempts. Trying to failover after sleeping for 2000ms.
10:45:49.565 AM             INFO      RetryInvocationHandler com.google.protobuf.ServiceException: java.net.ConnectException: Call From <HOSTNAME>/<IP> to <HOSTNAME>:9961 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused, while invoking $Proxy11.submitRequest over nodeId=node1,nodeAddress=<HOSTNAME>/<IP>:9961 after 2 failover attempts. Trying to failover after sleeping for 2000ms.
(repeated) 

java.net.ConnectException: Connection refused
    at java.base/sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at java.base/sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:777)
    at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:205)
    at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:586)
    at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:730)
    at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:843)
    at org.apache.hadoop.ipc.Client$Connection.access$3800(Client.java:430)
    at org.apache.hadoop.ipc.Client.getConnection(Client.java:1681)
    at org.apache.hadoop.ipc.Client.call(Client.java:1506)
    at org.apache.hadoop.ipc.Client.call(Client.java:1459)
    at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:233)
    at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:118)
    at com.sun.proxy.$Proxy14.submitRequest(Unknown Source)
    at jdk.internal.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:431)
    at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:166)
    at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:158)
    at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:96)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:362)
    at com.sun.proxy.$Proxy14.submitRequest(Unknown Source)
    at org.apache.hadoop.hdds.protocolPB.SCMSecurityProtocolClientSideTranslatorPB.submitRequest(SCMSecurityProtocolClientSideTranslatorPB.java:102)
    at org.apache.hadoop.hdds.protocolPB.SCMSecurityProtocolClientSideTranslatorPB.listCACertificate(SCMSecurityProtocolClientSideTranslatorPB.java:374)
    at org.apache.hadoop.hdds.security.x509.certificate.client.DefaultCertificateClient.updateCAList(DefaultCertificateClient.java:933)
    at org.apache.hadoop.hdds.security.x509.certificate.client.DefaultCertificateClient.listCA(DefaultCertificateClient.java:921)
    at org.apache.hadoop.hdds.security.x509.certificate.client.DefaultCertificateClient.getTrustChain(DefaultCertificateClient.java:410)
    at org.apache.hadoop.hdds.security.ssl.ReloadingX509KeyManager.loadKeyManager(ReloadingX509KeyManager.java:204)
    at org.apache.hadoop.hdds.security.ssl.ReloadingX509KeyManager.<init>(ReloadingX509KeyManager.java:85)
    at org.apache.hadoop.hdds.security.ssl.PemFileBasedKeyStoresFactory.createKeyManagers(PemFileBasedKeyStoresFactory.java:83)
    at org.apache.hadoop.hdds.security.ssl.PemFileBasedKeyStoresFactory.init(PemFileBasedKeyStoresFactory.java:104)
    at org.apache.hadoop.hdds.security.x509.keys.SecurityUtil.getServerKeyStoresFactory(SecurityUtil.java:103)
    at org.apache.hadoop.hdds.security.x509.certificate.client.DefaultCertificateClient.getServerKeyStoresFactory(DefaultCertificateClient.java:948)
    at org.apache.hadoop.hdds.scm.ha.HASecurityUtils.createSCMRatisTLSConfig(HASecurityUtils.java:345)
    at org.apache.hadoop.hdds.scm.ha.SCMRatisServerImpl.<init>(SCMRatisServerImpl.java:109)
    at org.apache.hadoop.hdds.scm.ha.SCMHAManagerImpl.<init>(SCMHAManagerImpl.java:97)
    at org.apache.hadoop.hdds.scm.server.StorageContainerManager.initializeSystemManagers(StorageContainerManager.java:646)
    at org.apache.hadoop.hdds.scm.server.StorageContainerManager.<init>(StorageContainerManager.java:400)
    at org.apache.hadoop.hdds.scm.server.StorageContainerManager.createSCM(StorageContainerManager.java:597)
    at org.apache.hadoop.hdds.scm.server.StorageContainerManager.createSCM(StorageContainerManager.java:609)
    at org.apache.hadoop.hdds.scm.server.StorageContainerManagerStarter$SCMStarterHelper.start(StorageContainerManagerStarter.java:171)
    at org.apache.hadoop.hdds.scm.server.StorageContainerManagerStarter.startScm(StorageContainerManagerStarter.java:145)
    at org.apache.hadoop.hdds.scm.server.StorageContainerManagerStarter.call(StorageContainerManagerStarter.java:74)
    at org.apache.hadoop.hdds.scm.server.StorageContainerManagerStarter.call(StorageContainerManagerStarter.java:48)
    at picocli.CommandLine.executeUserObject(CommandLine.java:1953)