My relevent codes are:
final KeyStore identityKeyStore = KeyUtil.loadKeystore(identityKeystore, identityKeyStorePassword);
X509Certificate clientCert = KeyUtil.getCertificate(clientCertAlias, identityKeyStore);
PrivateKey privateKey = KeyUtil.getPrivateKey(clientCertAlias, identityKeyStorePassword,
identityKeyStore);

WebServiceContext context = service.context();
WebServiceSession session = context.getSession();
session.setAttribute(WSSEClientHandler.CERT_ATTRIB UTE, clientCert);
session.setAttribute(WSSEClientHandler.KEY_ATTRIBU TE, privateKey);


and errors are


<000000> ..record.alert.Alert@1552b76 Severity: 2 Type: 42
java.lang.Throwable: Stack trace
at weblogic.security.utils.SSLSetup.debug(SSLSetup.ja va:265)
at com.certicom.tls.record.alert.Alert.(Unknown Source)
at com.certicom.tls.record.handshake.HandshakeHandler .fireAlert(Unknown
Source)
at com.certicom.tls.record.handshake.ClientStateRecei vedServerHello.hand
le(Unknown Source)
at com.certicom.tls.record.handshake.HandshakeHandler .handleHandshakeMes
sage(Unknown Source)
at com.certicom.tls.record.handshake.HandshakeHandler .handleHandshakeMes
sages(Unknown Source)
at com.certicom.tls.record.ReadHandler.interpretConte nt(Unknown Source)
at com.certicom.tls.record.ReadHandler.readRecord(Unk nown Source)
at com.certicom.tls.record.ReadHandler.readUntilHands hakeComplete(Unknow
n Source)
at com.certicom.tls.interfaceimpl.TLSConnectionImpl.c ompleteHandshake(Un
known Source)
at com.certicom.tls.record.WriteHandler.write(Unknown Source)
at java.io.BufferedOutputStream.flushBuffer(BufferedO utputStream.java:66
)
at java.io.BufferedOutputStream.write(BufferedOutputS tream.java:105)
at java.io.FilterOutputStream.write(FilterOutputStrea m.java:80)
at weblogic.webservice.binding.soap.HttpClientBinding .writeToStream(Http
ClientBinding.java:401)
at weblogic.webservice.binding.soap.HttpClientBinding .send(HttpClientBin
ding.java:192)
at weblogic.webservice.core.handler.ClientHandler.han dleRequest(ClientHa
ndler.java:37)
at weblogic.webservice.core.HandlerChainImpl.handleRe quest(HandlerChainI
mpl.java:143)
at weblogic.webservice.core.ClientDispatcher.send(Cli entDispatcher.java:
231)
at weblogic.webservice.core.ClientDispatcher.dispatch (ClientDispatcher.j
ava:143)
at weblogic.webservice.core.DefaultOperation.invoke(D efaultOperation.jav
a:457)
at weblogic.webservice.core.DefaultOperation.invoke(D efaultOperation.jav
a:443)
at weblogic.webservice.core.rpc.StubImpl._invoke(Stub Impl.java:254)