Caused by: com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting for a server that matches ReadPreferenceServerSelector{readPreference=primary}. Client view of cluster state is {type=UNKNOWN, servers=[{address=localhost:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by {java.net.ConnectException: Connection refused: connect}}]
at com.mongodb.connection.BaseCluster.createTimeoutException(BaseCluster.java:377) ~[mongo-java-driver-3.4.3.jar:?]
at com.mongodb.connection.BaseCluster.selectServer(BaseCluster.java:104) ~[mongo-java-driver-3.4.3.jar:?]
at com.mongodb.binding.ClusterBinding$ClusterBindingConnectionSource.(ClusterBinding.java:75) ~[mongo-java-driver-3.4.3.jar:?]
at com.mongodb.binding.ClusterBinding$ClusterBindingConnectionSource.(ClusterBinding.java:71) ~[mongo-java-driver-3.4.3.jar:?]
at com.mongodb.binding.ClusterBinding.getReadConnectionSource(ClusterBinding.java:63) ~[mongo-java-driver-3.4.3.jar:?]
at com.mongodb.operation.CommandOperationHelper.executeWrappedCommandProtocol(CommandOperationHelper.java:90) ~[mongo-java-driver-3.4.3.jar:?]
at com.mongodb.operation.CommandOperationHelper.executeWrappedCommandProtocol(CommandOperationHelper.java:85) ~[mongo-java-driver-3.4.3.jar:?]
at com.mongodb.operation.CommandReadOperation.execute(CommandReadOperation.java:55) ~[mongo-java-driver-3.4.3.jar:?]
at com.mongodb.Mongo.execute(Mongo.java:836) ~[mongo-java-driver-3.4.3.jar:?]
at com.mongodb.Mongo$2.execute(Mongo.java:823) ~[mongo-java-driver-3.4.3.jar:?]
at com.mongodb.DB.executeCommand(DB.java:729) ~[mongo-java-driver-3.4.3.jar:?]
at com.mongodb.DB.command(DB.java:491) ~[mongo-java-driver-3.4.3.jar:?]
at com.mongodb.DB.command(DB.java:507) ~[mongo-java-driver-3.4.3.jar:?]
at com.mongodb.DB.command(DB.java:462) ~[mongo-java-driver-3.4.3.jar:?]
at org.springframework.data.mongodb.core.MongoTemplate$2.doInDB(MongoTemplate.java:382) ~[spring-data-mongodb-1.10.7.RELEASE.jar:?]
at org.springframework.data.mongodb.core.MongoTemplate$2.doInDB(MongoTemplate.java:380) ~[spring-data-mongodb-1.10.7.RELEASE.jar:?]
at org.springframework.data.mongodb.core.MongoTemplate.execute(MongoTemplate.java:466) ~[spring-data-mongodb-1.10.7.RELEASE.jar:?]
... 111 more
[1;31m2018-03-23 15:24:25,441 ERROR [org.springframework.boot.web.support.ErrorPageFilter] - <Cannot forward to error page for request [/health] as the response has already been committed. As a result, the response may have the wrong status code. If your application is running on WebSphere Application Server you may be able to resolve this problem by setting com.ibm.ws.webcontainer.invokeFlushAfterService to false>[m
org.apache.catalina.connector.ClientAbortException: java.io.IOException: 你的主机中的软件中止了一个已建立的连接。

cas-manager项目运行正常，就是一直提示上面的错误，想问问是不是需要哪里修改一下配置