Java / Keystore Verified Signed Authentication

I am working on client-cert authentication between the embedded berth server and the client. They both use a keystore. The client certificate is signed by the server certificate, which is signed by the certification authority. Jetty uses method 2 to authenticate the client certificate, javax.net.ssl.SSLEngine, which seems to work, and they also use the code above.

List<X509Certificate> certList = Certificate chain sent by the client
KeyStore truststore = server truststore

//No use of CRL/OSCP/CRLDP
_crls = null;
_enableOCSP = false;
_enableCRLDP = false;

try{
 X509CertSelector certSelect = new X509CertSelector();
 certSelect.setCertificate((X509Certificate) certList.get(0));

 // Configure certification path builder parameters
 PKIXBuilderParameters pbParams = new PKIXBuilderParameters(truststore, certSelect);
 pbParams.addCertStore(CertStore.getInstance("Collection", new CollectionCertStoreParameters(certList)));

 // Set maximum certification path length
 pbParams.setMaxPathLength(-1);

 // Enable revocation checking
 pbParams.setRevocationEnabled(true);

 // Set static Certificate Revocation List
 if (_crls != null && !_crls.isEmpty())
     pbParams.addCertStore(CertStore.getInstance("Collection", new CollectionCertStoreParameters(_crls)));

  // Enable On-Line Certificate Status Protocol (OCSP) support
  if (_enableOCSP)
      Security.setProperty("ocsp.enable","true");

  // Enable Certificate Revocation List Distribution Points (CRLDP) support
  if (_enableCRLDP)
      System.setProperty("com.sun.security.enableCRLDP","true");

 // Build certification path
 CertPathBuilderResult buildResult = CertPathBuilder.getInstance("PKIX").build(pbParams);               

 // Validate certification path
 CertPathValidator.getInstance("PKIX").validate(buildResult.getCertPath(),pbParams);
}catch(GeneralSecurityException gse){
 ...
}

Of course, I have to use this second method ... So, let's focus on this code, is this a good way to verify a signed certificate? Here is the dump of my keystores:

Keystore Client:

Entry type: PrivateKeyEntry 
Certificate chain length: 2
Certificate[1]: 
Owner: EMAILADDRESS=truc@ok.com, CN=Servlet, OU=dev, O=Imbasoft, ST=Ile-de-France, C=FR 
Issuer: EMAILADDRESS=contact@greenpacs.com, CN=Greenpacs, OU=dev, O=Imbasoft, L=Bondy, ST=Ile-de-France, C=FR 
...

Certificate[2]: 
Owner: EMAILADDRESS=contact@greenpacs.com, CN=Greenpacs, OU=dev, O=Imbasoft, L=Bondy, ST=Ile-de-France, C=FR
Issuer: EMAILADDRESS=ghetolay@imbasoft.com, CN=Greenpacs Certificate Authority, OU=dev, O=Imbasoft, ST=Ile-de-France, C=FR 
...

Trust Server:

Entry type: trustedCertEntry

Owner: EMAILADDRESS=contact@greenpacs.com, CN=Greenpacs, OU=dev, O=Imbasoft, L=Bondy, ST=Ile-de-France, C=FR
Issuer: EMAILADDRESS=ghetolay@imbasoft.com, CN=Greenpacs Certificate Authority, OU=dev, O=Imbasoft, ST=Ile-de-France, C=FR

, ( , ), . , , (SSLEngine).

, , stacktrace:

java.security.cert.CertPathValidatorException: Could not determine revocation status
    at sun.security.provider.certpath.PKIXMasterCertPathValidator.validate(PKIXMasterCertPathValidator.java:153)
    at sun.security.provider.certpath.PKIXCertPathValidator.doValidate(PKIXCertPathValidator.java:325)
    at sun.security.provider.certpath.PKIXCertPathValidator.engineValidate(PKIXCertPathValidator.java:187)
    at java.security.cert.CertPathValidator.validate(CertPathValidator.java:267)
    at MainClass.main(MainClass.java:75)
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:197)
    at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:255)
    at sun.security.provider.certpath.CrlRevocationChecker.buildToNewKey(CrlRevocationChecker.java:583)
    at sun.security.provider.certpath.CrlRevocationChecker.verifyWithSeparateSigningKey(CrlRevocationChecker.java:459)
    at sun.security.provider.certpath.CrlRevocationChecker.verifyRevocationStatus(CrlRevocationChecker.java:339)
    at sun.security.provider.certpath.CrlRevocationChecker.verifyRevocationStatus(CrlRevocationChecker.java:248)
    at sun.security.provider.certpath.CrlRevocationChecker.check(CrlRevocationChecker.java:189)
    at sun.security.provider.certpath.PKIXMasterCertPathValidator.validate(PKIXMasterCertPathValidator.java:131)
    ... 4 more

( ) X509CertSelector, , , .

, SSL-, - /truststore. , , .

, Java.