tomcat 日志频繁打印：Invalid message received with signature xxxx

[sandy_shell]

最近发现tomcat 运行一段时间后会挂掉。后台频繁打印日志:
06-Feb-2017 11:06:02.026 SEVERE [ajp-nio-8009-exec-1] org.apache.coyote.ajp.AjpMessage.processHeader Invalid message received with signature 27759
06-Feb-2017 11:06:02.047 SEVERE [ajp-nio-8010-exec-9] org.apache.coyote.ajp.AjpMessage.processHeader Invalid message received with signature 27759
06-Feb-2017 11:06:03.183 WARNING [main] org.apache.catalina.core.StandardServer.await StandardServer.await: Invalid command 'login' received

这种基本上上10分钟一次

还有：
25-Jan-2017 06:47:01.024 WARNING [http-nio-8080-exec-9] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "tomcat"
25-Jan-2017 06:47:01.102 WARNING [http-nio-8080-exec-3] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "tomcat"
25-Jan-2017 06:47:01.164 WARNING [http-nio-8080-exec-1] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "tomcat"
25-Jan-2017 06:47:01.227 WARNING [http-nio-8080-exec-10] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "tomcat"
25-Jan-2017 06:47:01.618 WARNING [http-nio-8080-exec-2] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "tomcat"
25-Jan-2017 06:47:01.743 WARNING [http-nio-8080-exec-4] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "tomcat"
25-Jan-2017 06:47:01.805 WARNING [http-nio-8080-exec-5] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "tomcat"
25-Jan-2017 06:47:02.227 WARNING [http-nio-8080-exec-6] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "tomcat"
25-Jan-2017 06:47:02.290 WARNING [http-nio-8080-exec-8] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "tomcat"
25-Jan-2017 06:47:02.368 WARNING [http-nio-8080-exec-7] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "tomcat"
25-Jan-2017 06:47:02.430 WARNING [http-nio-8080-exec-9] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "tomcat"
25-Jan-2017 06:47:06.790 WARNING [http-nio-8080-exec-5] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "manager"
25-Jan-2017 06:47:07.243 WARNING [http-nio-8080-exec-6] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "manager"
25-Jan-2017 06:47:07.368 WARNING [http-nio-8080-exec-8] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "manager"
25-Jan-2017 06:47:09.602 WARNING [http-nio-8080-exec-7] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "manager"
25-Jan-2017 06:47:12.962 WARNING [http-nio-8080-exec-9] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "manager"
25-Jan-2017 06:47:13.087 WARNING [http-nio-8080-exec-3] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "manager"
25-Jan-2017 06:47:13.446 WARNING [http-nio-8080-exec-1] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "manager"
25-Jan-2017 06:47:13.459 WARNING [http-nio-8080-exec-10] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "manager"
25-Jan-2017 17:34:40.982 WARNING [http-nio-8080-exec-9] org.apache.catalina.realm.LockOutRealm.authenticate An attempt was made to authenticate the locked user "admin"

我这边的请求形式有http与ws。

服务器开发时间不长，还请哪位大神解释一下这种情况。万分感谢！
服务器是测试服务器，正式服务器上没问题。

有试过在配置server.xml中配置8009 的时候增加 address=‘127.0.0.1’，也没用