问题描述
2017-05-02T16:16:31.190+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is ’always’.2017-05-02T16:16:31.190+0800 I CONTROL [initandlisten] **We suggest setting it to ’never’2017-05-02T16:16:31.190+0800 I CONTROL [initandlisten]2017-05-02T16:16:31.190+0800 I CONTROL [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 3901 processes, 1000000 files. Number of processes should be at least 500000 : 0.5 times number of files.2017-05-02T16:16:31.190+0800 I CONTROL [initandlisten]2017-05-02T16:16:31.265+0800 I FTDC [initandlisten] Initializing full-time diagnostic data capture with directory ’/var/mongodb/data/diagnostic.data’2017-05-02T16:16:31.279+0800 I NETWORK [HostnameCanonicalizationWorker] Starting hostname canonicalization worker2017-05-02T16:16:31.282+0800 I NETWORK [initandlisten] waiting for connections on port 270172017-05-02T17:13:19.617+0800 I NETWORK [initandlisten] connection accepted from 127.0.0.1:52260 #1 (1 connection now open)2017-05-02T17:13:48.843+0800 I NETWORK [conn1] end connection 127.0.0.1:52260 (0 connections now open)2017-05-02T17:26:19.310+0800 I CONTROL [signalProcessingThread] got signal 15 (Terminated), will terminate after current cmd ends2017-05-02T17:26:19.310+0800 I FTDC [signalProcessingThread] Shutting down full-time diagnostic data capture2017-05-02T17:26:19.312+0800 I CONTROL [signalProcessingThread] now exiting2017-05-02T17:26:19.312+0800 I NETWORK [signalProcessingThread] shutdown: going to close listening sockets...2017-05-02T17:26:19.312+0800 I NETWORK [signalProcessingThread] closing listening socket: 62017-05-02T17:26:19.312+0800 I NETWORK [signalProcessingThread] closing listening socket: 72017-05-02T17:26:19.312+0800 I NETWORK [signalProcessingThread] removing socket file: /tmp/mongodb-27017.sock2017-05-02T17:26:19.313+0800 I NETWORK [signalProcessingThread] shutdown: going to flush diaglog...2017-05-02T17:26:19.313+0800 I NETWORK [signalProcessingThread] shutdown: going to close sockets...2017-05-02T17:26:19.313+0800 I STORAGE [signalProcessingThread] WiredTigerKVEngine shutting down2017-05-02T17:26:19.547+0800 I STORAGE [signalProcessingThread] shutdown: removing fs lock...2017-05-02T17:26:19.547+0800 I CONTROL [signalProcessingThread] dbexit: rc: 0
问题解答
回答1：这里列出的只是WARNING，并不会造成服务器退出。如果这这两个WARNING感兴趣，可查看文档:Disable Transparent Huge Pages (THP)UNIX ulimit Settings服务器退出的原因是：
2017-05-02T17:26:19.310+0800 I CONTROL [signalProcessingThread] got signal 15 (Terminated), will terminate after current cmd ends
实际上这是一个正常结束，可能是kill或其他类似的命令结束了mongod。
回答2：有警告啊： soft rlimits too low
