問題描述

1.最近在使用spring-boot和用spring-data-mongo操作mongodb

2.每天早上查看服務器日志都發現報了同一個錯，估計是在一整晚沒人訪問服務器，第二天一旦有人訪問就會發生錯誤

3.錯誤日志為：

07:51:35.185 [cluster-ClusterId{value=’59295e6c3532f223626a2ca0’, description=’null’}-localhost:27017] INFO org.mongodb.driver.cluster - Exception in monitor thread while connecting to server localhost:27017 com.mongodb.MongoSocketReadTimeoutException: Timeout while receiving message at com.mongodb.connection.InternalStreamConnection.translateReadException(InternalStreamConnection.java:477) at com.mongodb.connection.InternalStreamConnection.receiveMessage(InternalStreamConnection.java:228) at com.mongodb.connection.CommandHelper.receiveReply(CommandHelper.java:134) at com.mongodb.connection.CommandHelper.receiveCommandResult(CommandHelper.java:121) at com.mongodb.connection.CommandHelper.executeCommand(CommandHelper.java:32) at com.mongodb.connection.InternalStreamConnectionInitializer.initializeConnectionDescription(InternalStreamConnectionInitializer.java:85) at com.mongodb.connection.InternalStreamConnectionInitializer.initialize(InternalStreamConnectionInitializer.java:45) at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:116) at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:127) at java.lang.Thread.run(Thread.java:745)Caused by: java.net.SocketTimeoutException: Read timed out at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.socketRead(SocketInputStream.java:116) at java.net.SocketInputStream.read(SocketInputStream.java:171) at java.net.SocketInputStream.read(SocketInputStream.java:141) at com.mongodb.connection.SocketStream.read(SocketStream.java:85) at com.mongodb.connection.InternalStreamConnection.receiveResponseBuffers(InternalStreamConnection.java:494) at com.mongodb.connection.InternalStreamConnection.receiveMessage(InternalStreamConnection.java:224) ... 8 common frames omitted07:51:31.683 [cluster-ClusterId{value=’59295e583532f22362cf3b92’, description=’null’}-localhost:27017] INFO org.mongodb.driver.cluster - Exception in monitor thread while connecting to server localhost:27017 com.mongodb.MongoSocketReadTimeoutException: Timeout while receiving message at com.mongodb.connection.InternalStreamConnection.translateReadException(InternalStreamConnection.java:477) at com.mongodb.connection.InternalStreamConnection.receiveMessage(InternalStreamConnection.java:228) at com.mongodb.connection.CommandHelper.receiveReply(CommandHelper.java:134) at com.mongodb.connection.CommandHelper.receiveCommandResult(CommandHelper.java:121) at com.mongodb.connection.CommandHelper.executeCommand(CommandHelper.java:32) at com.mongodb.connection.InternalStreamConnectionInitializer.initializeConnectionDescription(InternalStreamConnectionInitializer.java:85) at com.mongodb.connection.InternalStreamConnectionInitializer.initialize(InternalStreamConnectionInitializer.java:45) at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:116) at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:127) at java.lang.Thread.run(Thread.java:745)Caused by: java.net.SocketTimeoutException: Read timed out at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.socketRead(SocketInputStream.java:116) at java.net.SocketInputStream.read(SocketInputStream.java:171) at java.net.SocketInputStream.read(SocketInputStream.java:141) at com.mongodb.connection.SocketStream.read(SocketStream.java:85) at com.mongodb.connection.InternalStreamConnection.receiveResponseBuffers(InternalStreamConnection.java:494) at com.mongodb.connection.InternalStreamConnection.receiveMessage(InternalStreamConnection.java:224) ... 8 common frames omitted07:51:35.780 [cluster-ClusterId{value=’59295e403532f2236234b535’, description=’null’}-localhost:27017] INFO org.mongodb.driver.cluster - Exception in monitor thread while connecting to server localhost:27017 com.mongodb.MongoSocketReadTimeoutException: Timeout while receiving message at com.mongodb.connection.InternalStreamConnection.translateReadException(InternalStreamConnection.java:477) at com.mongodb.connection.InternalStreamConnection.receiveMessage(InternalStreamConnection.java:228) at com.mongodb.connection.CommandHelper.receiveReply(CommandHelper.java:134) at com.mongodb.connection.CommandHelper.receiveCommandResult(CommandHelper.java:121) at com.mongodb.connection.CommandHelper.executeCommand(CommandHelper.java:32) at com.mongodb.connection.InternalStreamConnectionInitializer.initializeConnectionDescription(InternalStreamConnectionInitializer.java:85) at com.mongodb.connection.InternalStreamConnectionInitializer.initialize(InternalStreamConnectionInitializer.java:45) at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:116) at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:127) at java.lang.Thread.run(Thread.java:745)Caused by: java.net.SocketTimeoutException: Read timed out at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.socketRead(SocketInputStream.java:116) at java.net.SocketInputStream.read(SocketInputStream.java:171) at java.net.SocketInputStream.read(SocketInputStream.java:141) at com.mongodb.connection.SocketStream.read(SocketStream.java:85) at com.mongodb.connection.InternalStreamConnection.receiveResponseBuffers(InternalStreamConnection.java:494) at com.mongodb.connection.InternalStreamConnection.receiveMessage(InternalStreamConnection.java:224) ... 8 common frames omitted08:01:39.239 [cluster-ClusterId{value=’59295e583532f22362cf3b92’, description=’null’}-localhost:27017] INFO org.mongodb.driver.connection - Opened connection [connectionId{localValue:9, serverValue:828}] to localhost:27017 08:01:39.248 [cluster-ClusterId{value=’59295e583532f22362cf3b92’, description=’null’}-localhost:27017] INFO org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[3, 4, 4]}, minWireVersion=0, maxWireVersion=5, maxDocumentSize=16777216, roundTripTimeNanos=340319} 08:01:39.273 [cluster-ClusterId{value=’59295e6c3532f223626a2ca0’, description=’null’}-localhost:27017] INFO org.mongodb.driver.connection - Opened connection [connectionId{localValue:7, serverValue:827}] to localhost:27017 08:01:39.274 [cluster-ClusterId{value=’59295e403532f2236234b535’, description=’null’}-localhost:27017] INFO org.mongodb.driver.connection - Opened connection [connectionId{localValue:7, serverValue:826}] to localhost:27017 08:01:39.274 [cluster-ClusterId{value=’59295e403532f2236234b535’, description=’null’}-localhost:27017] INFO org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[3, 4, 4]}, minWireVersion=0, maxWireVersion=5, maxDocumentSize=16777216, roundTripTimeNanos=105791} 08:01:39.274 [cluster-ClusterId{value=’59295e6c3532f223626a2ca0’, description=’null’}-localhost:27017] INFO org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[3, 4, 4]}, minWireVersion=0, maxWireVersion=5, maxDocumentSize=16777216, roundTripTimeNanos=532381}

4.嘗試過一些解決方法，把鏈接mongodb的代碼改成：

new MongoClient(new ServerAddress(env.getProperty('mongo.host'), Integer.valueOf(env.getProperty('mongo.port'))), Arrays.asList(credential), MongoClientOptions.builder().socketTimeout(10000).minHeartbeatFrequency(25).heartbeatSocketTimeout(3000).socketKeepAlive(true).build());

也把服務器（Ubuntu）ipv4的keep alive時間改成了120秒。

但是錯誤還在，希望大家指教指教，謝謝！

問題解答

多半是MongoDB把Java保持的連接踢掉了(狀態變成CLOSE_WAIT，只能發數據但無法再收到)，可以從兩個地方想想辦法：

把連接池配置好（這個貌似很復雜），或者干脆不用連接池，即socketKeepAlive設成false；

因為你的問題都出現在早上，可以查下MongoDB有沒有凌晨重置連接的策略。

1、可能是遇到了查詢時間過長的Read，不妨看看profiling或者server log日志的信息，找到查詢時間比較長的語句，例如超過10秒的語句，看是否能優化；

2、適當提高socketTimeout一些，看是否能緩解這種出錯的情形。

供參考。

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