CCO上MongoDB“连接超时”错误

简介

本文档介绍如果CloudCenter Orchestrator(CCO)上最终出现“连接超时”错误，如何进行故障排除。

问题

为CCO配置MongoDB后，当它无法与MongoDB正确连接时，它可能会失败。此问题可能是由于许多因素造成的，但是，上述场景是IPTABLES阻塞的端口。

要诊断问题，始终建议查看日志文件并检查错误的实际原因。此处由于连接超时导致错误。

2017-05-25 17:35:53,340 ERROR context.ContextLoader [localhost-startStop-1]  - Context initialization failed
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 (Connection refused)}}]
        at com.mongodb.connection.BaseCluster.createTimeoutException(BaseCluster.java:369)
        at com.mongodb.connection.BaseCluster.selectServer(BaseCluster.java:101)
        at com.mongodb.binding.ClusterBinding$ClusterBindingConnectionSource. 
      
        (ClusterBinding.java:75) 
       
        at com.mongodb.binding.ClusterBinding$ClusterBindingConnectionSource. 
       
         (ClusterBinding.java:71) 
        
        at com.mongodb.binding.ClusterBinding.getReadConnectionSource(ClusterBinding.java:63) 
        
        at com.mongodb.operation.OperationHelper.withConnection(OperationHelper.java:210) 
        
        at com.mongodb.operation.FindOperation.execute(FindOperation.java:480) 
        
        at com.mongodb.operation.FindOperation.execute(FindOperation.java:77) 
        
        at com.mongodb.Mongo.execute(Mongo.java:773) 
        
        at com.mongodb.Mongo$2.execute(Mongo.java:760) 
        
        at com.mongodb.DBCursor.initializeCursor(DBCursor.java:851) 
        
        at com.mongodb.DBCursor.hasNext(DBCursor.java:152) 
        
        at com.hazelcast.spring.mongodb.MongoMapStore.loadAllKeys(MongoMapStore.java:142) 
        
        at com.hazelcast.spring.mongodb.MongoMapStore.loadAllKeys(MongoMapStore.java:47) 
        
        at com.hazelcast.map.impl.MapStoreWrapper.loadAllKeys(MapStoreWrapper.java:119) 
        
        at com.hazelcast.map.impl.mapstore.BasicMapStoreContext.loadAllKeys(BasicMapStoreContext.java:179) 
        
        at com.hazelcast.map.impl.MapKeyLoader.sendKeysInBatches(MapKeyLoader.java:249) 
        
        at com.hazelcast.map.impl.MapKeyLoader.access$200(MapKeyLoader.java:65) 
        
        at com.hazelcast.map.impl.MapKeyLoader$1.call(MapKeyLoader.java:152) 
        
        at com.hazelcast.map.impl.MapKeyLoader$1.call(MapKeyLoader.java:149) 
        
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) 
        
        at com.hazelcast.util.executor.CompletableFutureTask.run(CompletableFutureTask.java:57) 
        
        at com.hazelcast.util.executor.CachedExecutorServiceDelegate$Worker.run(CachedExecutorServiceDelegate.java:209) 
        
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
        
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
        
        at java.lang.Thread.run(Thread.java:748) 
        
        at com.hazelcast.util.executor.HazelcastManagedThread.executeRun(HazelcastManagedThread.java:76) 
        
        at com.hazelcast.util.executor.HazelcastManagedThread.run(HazelcastManagedThread.java:92) 
        
 
        
 
        
      

应用程序版本

解决方案

在IPTABLES中为MongoDB添加例外并执行以下命令：

# iptables -A INPUT -ptcp --dport 27017 -j ACCEPT 

 然后重新启动MongoDB服务并重新启动tomcat服务：

# /etc/init.d/mongod restart
# /etc/init.d/tomcat restart