我有一个生产MongoDB 2.4在日志中给这个错误：
SocketException handling request, closing client connection: 9001 socket exception [SEND_ERROR] server [127.0.0.1:37934] 客户端的日志报告连接超时。
mongod --version reports v2.4.10（我在Debian jessie上，MongoDB是从jessie仓库安装的）， net.ipv4.tcp_keepalive_time sysctl被设置为300，这是由于在Mongo日志中SocketException的推荐。 此外，当重新启动MongoDB和应用程序后直接触发数据库查询时，错误仍然存在，这对我来说，这是不是SERVER-5632（在上面的问题中提到）。
/proc/pid/limits报告除堆栈大小，核心文件大小，进程，locking的内存，挂起的信号，msgqueue大小，好的和实时的优先级以及打开的文件之外的所有内容都是无限的。 这最后一个特别是软限制1024和硬限制4096，这不是什么MongoDB文档推荐，但不应该是一个问题无论如何，因为ls /proc/pid/fd | wc -l ls /proc/pid/fd | wc -l只报告29个开放的fds。
free -g报告3 GB的可用内存，+/-缓冲区和caching。 重新启动整个服务器在短时间内似乎有所帮助，但是它又一次变得糟糕。 以下是日志中的一个片段：
Wed Mar 1 20:14:17.466 [conn1] authenticate db: pumpio { authenticate: 1, user: "pump.io", nonce: "7ac439ffd4c01a6d", key: "abe7862c7eb1f9765ebaa007d7c20ec2" } Wed Mar 1 20:14:26.445 [conn1] command pumpio.$cmd command: { authenticate: 1, user: "pump.io", nonce: "7ac439ffd4c01a6d", key: "abe7862c7eb1f9765ebaa007d7c20ec2" } ntoreturn:1 keyUpdates:0 locks(micros) W:8978364 r:412 reslen:74 8979ms Wed Mar 1 20:14:41.809 [initandlisten] connection accepted from 127.0.0.1:58216 #2 (2 connections now open) Wed Mar 1 20:14:46.302 [initandlisten] connection accepted from 127.0.0.1:58218 #3 (3 connections now open) Wed Mar 1 20:14:49.212 [initandlisten] connection accepted from 127.0.0.1:58220 #4 (4 connections now open) Wed Mar 1 20:14:49.212 [initandlisten] connection accepted from 127.0.0.1:58222 #5 (5 connections now open) Wed Mar 1 20:14:49.212 [initandlisten] connection accepted from 127.0.0.1:58224 #6 (6 connections now open) Wed Mar 1 20:14:49.213 [initandlisten] connection accepted from 127.0.0.1:58226 #7 (7 connections now open) Wed Mar 1 20:14:49.213 [initandlisten] connection accepted from 127.0.0.1:58228 #8 (8 connections now open) Wed Mar 1 20:14:49.213 [initandlisten] connection accepted from 127.0.0.1:58230 #9 (9 connections now open) Wed Mar 1 20:14:49.213 [initandlisten] connection accepted from 127.0.0.1:58232 #10 (10 connections now open) Wed Mar 1 20:14:49.213 [initandlisten] connection accepted from 127.0.0.1:58234 #11 (11 connections now open) Wed Mar 1 20:14:49.213 [initandlisten] connection accepted from 127.0.0.1:58236 #12 (12 connections now open) Wed Mar 1 20:14:50.685 [conn1] query pumpio.session query: { _id: "9n_7gseqgT8i07tQbnBj7gNgURdQNmS8" } ntoreturn:1 idhack:1 keyUpdates:0 locks(micros) r:13911898 reslen:202 17129ms Wed Mar 1 20:14:50.695 [conn2] authenticate db: pumpio { authenticate: 1, user: "pump.io", nonce: "7e918deb40e23f92", key: "0b4b2d78fa404e594dc1d066c9402cc4" } Wed Mar 1 20:14:52.960 [conn1] SocketException handling request, closing client connection: 9001 socket exception [SEND_ERROR] server [127.0.0.1:58214] Wed Mar 1 20:14:52.960 [conn7] assertion 16550 not authorized for query on reportr.system.indexes ns:reportr.system.indexes query:{ ns: "reportr.alerts" } Wed Mar 1 20:14:52.960 [conn12] assertion 16550 not authorized for query on reportr.system.indexes ns:reportr.system.indexes query:{ ns: "reportr.alerts" } Wed Mar 1 20:14:52.960 [conn5] assertion 16550 not authorized for query on reportr.system.indexes ns:reportr.system.indexes query:{ ns: "reportr.events" } Wed Mar 1 20:14:52.960 [conn10] assertion 16550 not authorized for query on reportr.system.indexes ns:reportr.system.indexes query:{ ns: "reportr.events" } Wed Mar 1 20:14:58.713 [initandlisten] connection accepted from 127.0.0.1:58238 #13 (12 connections now open) Wed Mar 1 20:14:58.715 [conn13] authenticate db: pumpio { authenticate: 1, user: "pump.io", nonce: "fe508e5612e933fa", key: "492c9d11f582c045941da7f7eb16b8bd" } Wed Mar 1 20:15:07.599 [conn2] update pumpio.session query: { _id: "i_vJ67QJA56LsQvLMF8GuiosMHUj7--P" } update: { cookie: { originalMaxAge: null, expires: null, httpOnly: true, path: "/" }, _id: "i_vJ67QJA56LsQvLMF8GuiosMHUj7--P" } idhack:1 nupdated:1 upsert:1 keyUpdates:0 locks(micros) w:16896964 16897ms Wed Mar 1 20:15:07.600 [conn2] SocketException handling request, closing client connection: 9001 socket exception [SEND_ERROR] server [127.0.0.1:58216] Wed Mar 1 20:15:07.600 [conn13] command pumpio.$cmd command: { authenticate: 1, user: "pump.io", nonce: "fe508e5612e933fa", key: "492c9d11f582c045941da7f7eb16b8bd" } ntoreturn:1 keyUpdates:0 locks(micros) r:1225 reslen:74 8885ms Wed Mar 1 20:15:08.050 [conn13] update pumpio.session query: { _id: "deiIhAPc1vaXYZ_JzU72slghiCMOu1Zf" } update: { cookie: { originalMaxAge: null, expires: null, httpOnly: true, path: "/" }, _id: "deiIhAPc1vaXYZ_JzU72slghiCMOu1Zf" } idhack:1 nupdated:1 upsert:1 keyUpdates:0 locks(micros) w:109 447ms Wed Mar 1 20:15:15.592 [TTLMonitor] query local.system.indexes query: { expireAfterSeconds: { $exists: true } } ntoreturn:0 ntoskip:0 nscanned:0 keyUpdates:0 locks(micros) r:142680 nreturned:0 reslen:20 142ms Wed Mar 1 20:15:30.773 [conn13] query pumpio.recentdialbackrequests query: { _id: 0 } ntoreturn:1 idhack:1 keyUpdates:0 locks(micros) r:2751358 reslen:95317 2751ms Wed Mar 1 20:16:14.855 [conn13] query pumpio.comment query: { _uuid: "oudHqMliREq5HSXd-7N62Q" } ntoreturn:1000 ntoskip:0 nscanned:1 keyUpdates:0 locks(micros) r:3247907 nreturned:1 reslen:900 4951ms Wed Mar 1 20:16:14.855 [conn13] SocketException handling request, closing client connection: 9001 socket exception [SEND_ERROR] server [127.0.0.1:58238]
这是我重新启动MongoDB服务器和应用程序服务器后。 这两个都在同一主机上，应用程序连接到localhost来发出数据库查询。
任何想法发生了什么？