--- java/org/apache/tomcat/util/net/AprEndpoint.java	(revision 1080234)
+++ java/org/apache/tomcat/util/net/AprEndpoint.java	(working copy)
@@ -493,6 +493,9 @@ 
             }
             // List the ciphers that the client is permitted to negotiate
             SSLContext.setCipherSuite(sslContext, SSLCipherSuite);
+            if (SSLCertificateFile == null){ // Check here so can give specific error message
+                throw new Exception("Connector attribute SSLCertificateFile must be defined when using SSL with APR");
+            }
             // Load Server key and certificate
             SSLContext.setCertificate(sslContext, SSLCertificateFile, SSLCertificateKeyFile, SSLPassword, SSL.SSL_AIDX_RSA);
             // Set certificate chain file