遇到的问题-----mongodb.MongoException$Network: can't call something

java操作mongoDB的开发，实时插入mongoDB。

一开始是正常的，运行一段时间后开始报错。

长时间运行测试遇到问题，报错信息如下：

<Exception><Message><![CDATA[com.mongodb.MongoException$Network: can't call something]]></Message><StackTrace><![CDATA[com.mongodb.MongoException$Network: can't call something
at com.mongodb.DBTCPConnector.call(DBTCPConnector.java:216)
at com.mongodb.DBApiLayer$MyCollection.__find(DBApiLayer.java:296)
at com.mongodb.DB.command(DB.java:152)
at com.mongodb.DB._doauth(DB.java:496)
at com.mongodb.DB.authenticate(DB.java:433)
at com.bj58.groupbuy.framework.MongoUtils.MongoUtil.getCollection(MongoUtil.java:22)
at com.bj58.web.index.controllers.OtherController.userRecord(OtherController.java:328)
at sun.reflect.GeneratedMethodAccessor204.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.bj58.wf.mvc.invoke.ActionInvoker.invoke(ActionInvoker.java:69)
at com.bj58.wf.mvc.MvcDispatcher.service(MvcDispatcher.java:103)
at com.bj58.wf.mvc.MvcFilter.doFilter(MvcFilter.java:60)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:394)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:284)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:322)
at org.apache.tomcat.util.net.AprEndpoint$SocketWithOptionsProcessor.run(AprEndpoint.java:1663)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.io.EOFException
at org.bson.io.Bits.readFully(Bits.java:37)
at org.bson.io.Bits.readFully(Bits.java:28)
at com.mongodb.Response.<init>(Response.java:35)
at com.mongodb.DBPort.go(DBPort.java:110)
at com.mongodb.DBPort.go(DBPort.java:75)
at com.mongodb.DBPort.call(DBPort.java:65)
at com.mongodb.DBTCPConnector.call(DBTCPConnector.java:207)
... 26 more

怀疑是mongo的连接未关闭导致的，或者连接池用完  ，总之就是连接断开了 

第一种java对mongodb的操作可以用如下方法设置：

Mongo conn=new Mongo("127.0.0.1");
MongoOptions option=conn.getMongoOptions();
option.autoConnectRetry=true;
option.socketTimeout=2000;
option.socketKeepAlive=true;

试试设置这两个参数以后可以保持持久连接

option 还可以设置如下这些属性,根据需求选择：

  MongoOptions options = new MongoOptions();
             options.autoConnectRetry = true;
             options.connectionsPerHost = (200);
             options.maxWaitTime = (200);
             options.socketTimeout = (200);
             options.connectTimeout = (200);
             options.threadsAllowedToBlockForConnectionMultiplier = (200);
             m = new Mongo(new ServerAddress("10.20.141.22", (200)), options);

Spring 和mongodb集成的话,设置如下:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mongo="http://www.springframework.org/schema/data/mongo"
	xsi:schemaLocation="http://www.springframework.org/schema/context
          http://www.springframework.org/schema/context/spring-context-3.0.xsd
          http://www.springframework.org/schema/data/mongo
          http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd
          http://www.springframework.org/schema/beans
          http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
	<context:property-placeholder location="classpath*:META-INF/mongodb/mongodb.properties"/>
	
	<!-- 定义mongo对象，对应的是mongodb官方jar包中的Mongo，replica-set设置集群副本的ip地址和端口 -->
	<mongo:mongo id="mongo" replica-set="localhost:27017">
		<!-- 一些连接属性的设置 -->	
		<mongo:options
		     connections-per-host="${mongo.connectionsPerHost}"
		     threads-allowed-to-block-for-connection-multiplier="${mongo.threadsAllowedToBlockForConnectionMultiplier}"
		     connect-timeout="${mongo.connectTimeout}"
		     max-wait-time="${mongo.maxWaitTime}"
		     auto-connect-retry="${mongo.autoConnectRetry}"
		     socket-keep-alive="${mongo.socketKeepAlive}"
		     socket-timeout="${mongo.socketTimeout}"
		     slave-ok="${mongo.slaveOk}"
		     write-number="1"
		     write-timeout="0"
		     write-fsync="true"/>		
	</mongo:mongo>

	<!-- mongo的工厂，通过它来取得mongo实例,dbname为mongodb的数据库名，没有的话会自动创建 -->
	<mongo:db-factory dbname="test" mongo-ref="mongo"/>

	<!-- mongodb的主要操作对象，所有对mongodb的增删改查的操作都是通过它完成 -->
	<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
	  <constructor-arg name="mongoDbFactory" ref="mongoDbFactory"/>
	</bean>
	
	<!-- 映射转换器，扫描back-package目录下的文件，根据注释，把它们作为mongodb的一个collection的映射 -->
	<mongo:mapping-converter base-package="com.xxx.xxx.domain" />
	
	<!-- mongodb bean的仓库目录，会自动扫描扩展了MongoRepository接口的接口进行注入 -->
	<mongo:repositories base-package="com.xxx.xxx.persist.mongodb"/>

	<!-- To translate any MongoExceptions thrown in @Repository annotated classes -->
	<context:annotation-config />
    
</beans>