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  1. Core Server
  2. SERVER-15579

MongoD MMAP V1 engine does not recover from partially created .ns file

    • Type: Icon: Bug Bug
    • Resolution: Won't Fix
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: None
    • Component/s: MMAPv1, Storage
    • None
    • Storage Execution
    • ALL
    • 0

      This was reproduced through the repl7.js test, which kills mongod using signal 9 while the server is creating a new database. Upon restart, the .ns file is found to be incomplete and startup fails.

       m31001| 2014-10-09T01:31:29.577+0000 I INDEXING [replslave] allocating new ns file /data/db/repl7tests-slave/aa.ns, filling with zeroes...
      

      Server is killed using SIGKILL at this point and upon restart, this failure occurs and causes the server to shut down:

       m31001| 2014-10-09T01:31:34.609+0000 I -        [initandlisten] MongoDB starting : pid=28630 port=31001 dbpath=/data/db/repl7tests-slave slave=1 64-bit host=ip-10-171-61-242
       m31001| 2014-10-09T01:31:34.609+0000 I -        [initandlisten] 
       m31001| 2014-10-09T01:31:34.609+0000 I -        [initandlisten] ** NOTE: This is a development version (2.7.8-pre-) of MongoDB.
       m31001| 2014-10-09T01:31:34.609+0000 I -        [initandlisten] **       Not recommended for production.
       m31001| 2014-10-09T01:31:34.609+0000 I -        [initandlisten] 
       m31001| 2014-10-09T01:31:34.610+0000 I -        [initandlisten] db version v2.7.8-pre-
       m31001| 2014-10-09T01:31:34.610+0000 I -        [initandlisten] git version: bc8c4b81164c17f95d01262e6aeb22f934e5ed8f
       m31001| 2014-10-09T01:31:34.610+0000 I -        [initandlisten] OpenSSL version: OpenSSL 1.0.1 14 Mar 2012
       m31001| 2014-10-09T01:31:34.610+0000 I -        [initandlisten] build info: Linux ip-10-231-169-199 3.2.0-36-virtual #57-Ubuntu SMP Tue Jan 8 22:04:49 UTC 2013 x86_64 BOOST_LIB_VERSION=1_49
       m31001| 2014-10-09T01:31:34.610+0000 I -        [initandlisten] allocator: tcmalloc
       m31001| 2014-10-09T01:31:34.610+0000 I -        [initandlisten] options: { net: { bindIp: "127.0.0.1", http: { enabled: false }, port: 31001 }, nopreallocj: true, replication: { oplogSizeMB: 40 }, security: { keyFile: "/data/mci/shell/src/jstests/libs/authTestsKey" }, setParameter: { authenticationMechanisms: "MONGODB-CR", enableLocalhostAuthBypass: "false", enableTestCommands: "1" }, slave: true, source: "127.0.0.1:31000", storage: { dbPath: "/data/db/repl7tests-slave", journal: { enabled: true }, preallocDataFiles: false, smallFiles: true } }
       m31001| 2014-10-09T01:31:34.611+0000 I JOURNAL  [initandlisten] journal dir=/data/db/repl7tests-slave/journal
       m31001| 2014-10-09T01:31:34.611+0000 I JOURNAL  [initandlisten] recover : no journal files present, no recovery needed
       m31001| 2014-10-09T01:31:34.637+0000 I INDEXING [initandlisten] bad .ns file: /data/db/repl7tests-slave/aa.ns
       m31001| 2014-10-09T01:31:34.638+0000 I -        [initandlisten] warning database /data/db/repl7tests-slave aa could not be opened
       m31001| 2014-10-09T01:31:34.638+0000 I -        [initandlisten] DBException 10079: bad .ns file length, cannot open database
       m31001| 2014-10-09T01:31:34.638+0000 I STORAGE  [initandlisten] exception in initAndListen: 10079 bad .ns file length, cannot open database, terminating
       m31001| 2014-10-09T01:31:34.638+0000 I COMMANDS [initandlisten] now exiting
       m31001| 2014-10-09T01:31:34.638+0000 I NETWORK  [initandlisten] shutdown: going to close listening sockets...
       m31001| 2014-10-09T01:31:34.638+0000 I NETWORK  [initandlisten] removing socket file: /tmp/mongodb-31001.sock
       m31001| 2014-10-09T01:31:34.638+0000 I NETWORK  [initandlisten] shutdown: going to flush diaglog...
       m31001| 2014-10-09T01:31:34.638+0000 I NETWORK  [initandlisten] shutdown: going to close sockets...
       m31001| 2014-10-09T01:31:34.638+0000 I STORAGE  [initandlisten] shutdown: waiting for fs preallocator...
       m31001| 2014-10-09T01:31:34.638+0000 I STORAGE  [initandlisten] shutdown: final commit...
       m31001| 2014-10-09T01:31:34.643+0000 I STORAGE  [initandlisten] shutdown: closing all files...
       m31001| 2014-10-09T01:31:34.649+0000 I STORAGE  [initandlisten] closeAllFiles() finished
       m31001| 2014-10-09T01:31:34.649+0000 I JOURNAL  [initandlisten] journalCleanup...
       m31001| 2014-10-09T01:31:34.649+0000 I JOURNAL  [initandlisten] removeJournalFiles
       m31001| 2014-10-09T01:31:34.650+0000 I STORAGE  [initandlisten] shutdown: removing fs lock...
       m31001| 2014-10-09T01:31:34.650+0000 I COMMANDS [initandlisten] dbexit:  rc: 100
      

            Assignee:
            backlog-server-execution [DO NOT USE] Backlog - Storage Execution Team
            Reporter:
            kaloian.manassiev@mongodb.com Kaloian Manassiev
            Votes:
            1 Vote for this issue
            Watchers:
            5 Start watching this issue

              Created:
              Updated:
              Resolved: