title: Mongodb crash got signal 15 (Terminated)
body: <p>my mongodb server suddenly got signal 15 (Terminated). I don't have any idea why the mongodb crashed. Below is the log messages.</p>
  
  <pre><code>Mon Jun 27 07:33:31.701 [signalProcessingThread] got signal 15 (Terminated), will terminate after current cmd ends
  Mon Jun 27 07:33:31.704 [signalProcessingThread] now exiting
  Mon Jun 27 07:33:31.704 dbexit: 
  Mon Jun 27 07:33:31.704 [signalProcessingThread] shutdown: going to close listening sockets...
  Mon Jun 27 07:33:31.704 [signalProcessingThread] closing listening socket: 9
  Mon Jun 27 07:33:31.704 [signalProcessingThread] closing listening socket: 10
  Mon Jun 27 07:33:31.704 [signalProcessingThread] closing listening socket: 11
  Mon Jun 27 07:33:31.705 [signalProcessingThread] removing socket file: /tmp/mongodb-27017.sock
  Mon Jun 27 07:33:31.705 [signalProcessingThread] shutdown: going to flush diaglog...
  Mon Jun 27 07:33:31.705 [signalProcessingThread] shutdown: going to close sockets...
  Mon Jun 27 07:33:31.706 [signalProcessingThread] shutdown: waiting for fs preallocator...
  Mon Jun 27 07:33:31.706 [signalProcessingThread] shutdown: lock for final commit...
  Mon Jun 27 07:33:31.706 [signalProcessingThread] shutdown: final commit...
  </code></pre>
  
  <p>Below is restart process.</p>
  
  <pre><code>***** SERVER RESTARTED *****
  
  
  Mon Jun 27 07:34:22.500 [initandlisten] MongoDB starting : pid=888 port=27017 dbpath=/var/lib/mongodb 64-bit host=jasa-online
  Mon Jun 27 07:34:22.500 [initandlisten] db version v2.4.9
  Mon Jun 27 07:34:22.500 [initandlisten] git version: nogitversion
  Mon Jun 27 07:34:22.500 [initandlisten] build info: Linux orlo 3.2.0-58-generic #88-Ubuntu SMP Tue Dec 3 17:37:58 UTC 2013 x86_64 BOOST_LIB_VERSION=1_54
  Mon Jun 27 07:34:22.500 [initandlisten] allocator: tcmalloc
  Mon Jun 27 07:34:22.500 [initandlisten] options: { bind_ip: "0.0.0.0", config: "/etc/mongodb.conf", dbpath: "/var/lib/mongodb", journal: "true", logappend: "true", logpath: "/var/log/mongodb/mongodb.log" }
  Mon Jun 27 07:34:22.531 [initandlisten] journal dir=/var/lib/mongodb/journal
  Mon Jun 27 07:34:22.531 [initandlisten] recover : no journal files present, no recovery needed
  </code></pre>
  
  <p>The MongoDB shell version is 2.4.9. How can i figured out why this is happen ? Is that caused by long running query that run more than 300s ?</p>