配置tomcat连接器后，启动服务报错“No Certificate file specified or invalid file format"异常

1：原来的配置是

 <Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true"
                maxThreads="150" scheme="https" secure="true"
                clientAuth="false" sslProtocol="TLS" keystoreFile="conf/.keystore" keystorePass="123456"/>

2：保存配置，启动服务器，报如下异常：

java.lang.Exception: No Certificate file specified or invalid file format
at org.apache.tomcat.jni.SSLContext.setCertificate(Native Method)
at org.apache.tomcat.util.net.AprEndpoint.init(AprEndpoint.java:835)
at org.apache.coyote.http11.Http11AprProtocol.init(Http11AprProtocol.java:109)
at org.apache.catalina.connector.Connector.initialize(Connector.java:1141)
at org.apache.catalina.core.StandardService.initialize(StandardService.java:703)
at org.apache.catalina.core.StandardServer.initialize(StandardServer.java:843)
at org.apache.catalina.startup.Catalina.load(Catalina.java:538)
at org.apache.catalina.startup.Catalina.load(Catalina.java:562)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:261)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)

原因：tomcat版本问题，我用的是tomcat6_45版本，默认使用apr协议，解决办法：

配置修改为：

   <Connector port="8443" protocol="org.apache.coyote.http11.Http11Protocol" SSLEnabled="true"
                maxThreads="150" scheme="https" secure="true"
                clientAuth="false" sslProtocol="TLS" keystoreFile="conf/.keystore" keystorePass="123456"/>

再次重启服务器，就没有问题了。