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  1. Core Server
  2. SERVER-6937

Ensure system.profile collection is capped

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    • Type: Icon: Bug Bug
    • Resolution: Duplicate
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: 2.0.6
    • Component/s: None
    • None
    • Environment:
      CentOS 6.2, likely all
    • ALL

      When logging to the system.profile collection, we seem to reuse the fast_oplog_insert() method, which assumes the profile will be capped. If you create an uncapped profile frist, the call to alloc() can return an empty DiskLoc and result in an unusable database. Calls to show dbs, show collections, etc. will fail for the entire database. The following message will be constantly repeated:

      Tue Sep  4 18:48:32 [conn2314]  catalog.catalog Assertion failure !loc.isNull() db/pdfile.cpp 1886
0x57a8a6 0x5853eb 0x8a67f6 0x77a0fe 0x88e17c 0xaa0bc8 0x6389f7 0x3fc70077f1 0x3fc6ce5ccd 
 /var/lib/mongo/bin/mongod(_ZN5mongo12sayDbContextEPKc+0x96) [0x57a8a6]
 /var/lib/mongo/bin/mongod(_ZN5mongo8assertedEPKcS1_j+0xfb) [0x5853eb]
 /var/lib/mongo/bin/mongod(_ZN5mongo11DataFileMgr17fast_oplog_insertEPNS_16NamespaceDetailsEPKci+0x376) [0x8a67f6]
 /var/lib/mongo/bin/mongod(_ZN5mongo7profileERKNS_6ClientERNS_5CurOpE+0xc1e) [0x77a0fe]
 /var/lib/mongo/bin/mongod(_ZN5mongo16assembleResponseERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortE+0x9fc) [0x88e17c]
 /var/lib/mongo/bin/mongod(_ZN5mongo16MyMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortEPNS_9LastErrorE+0x78) [0xaa0bc8]
 /var/lib/mongo/bin/mongod(_ZN5mongo3pms9threadRunEPNS_13MessagingPortE+0x287) [0x6389f7]
 /lib64/libpthread.so.0() [0x3fc70077f1]
 /lib64/libc.so.6(clone+0x6d) [0x3fc6ce5ccd]

            Assignee:
            Unassigned Unassigned
            Reporter:
            benjamin.becker Ben Becker
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              Created:
              Updated:
              Resolved: