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  1. Core Server
  2. SERVER-13465

Shard with replica set name of "admin" triggers dassert

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Gone away
    • Affects Version/s: 2.6.0-rc2
    • Fix Version/s: None
    • Component/s: Sharding
    • Labels:
      None
    • Operating System:
      ALL
    • Sprint:
      Sharding 2019-02-11

      Description

      2014-04-02T16:16:21.154-0400 [Balancer] distributed lock 'balancer/sv.local:27017:1396469721:16807' acquired, ts : 533c7014c82dea452b90e6d8
      2014-04-02T16:16:21.154-0400 [Balancer] *** start balancing round
      2014-04-02T16:16:21.154-0400 [Balancer] waitForDelete: 0
      2014-04-02T16:16:21.154-0400 [Balancer] secondaryThrottle: 1
      2014-04-02T16:16:21.156-0400 [Balancer] no collections to balance
      2014-04-02T16:16:21.156-0400 [Balancer] no need to move any chunk
      2014-04-02T16:16:21.156-0400 [Balancer] *** end of balancing round
      2014-04-02T16:16:21.157-0400 [conn5] Request::process end ns: admin.$cmd msg id: 2 op: 2004 attempt: 0 11ms
      2014-04-02T16:16:21.158-0400 [conn5] Request::process begin ns: test.system.indexes msg id: 3 op: 2002 attempt: 0
      2014-04-02T16:16:21.159-0400 [conn5] src/mongo/s/dbclient_shard_resolver.cpp 43 chooseWriteHost - shardName: admin
      2014-04-02T16:16:21.159-0400 [conn5] Fatal Assertion 16199
      2014-04-02T16:16:21.170-0400 [conn5] 0x100993d85 0x1008fbba4 0x1008d156b 0x10000c180 0x10070c17b 0x1007ee267 0x10064ab68 0x10064c7b1 0x10065e0d9 0x10077e91d 0x100690285 0x1007a5a2f 0x10077d5b9 0x10000565f 0x10091087e 0x10090ea01 0x10090ea66 0x10090eaa1 0x100a09879 0x7fff8e38a772
       0   mongos                              0x0000000100993d85 _ZN5mongo15printStackTraceERSo + 37
       1   mongos                              0x00000001008fbba4 _ZN5mongo10logContextEPKc + 228
       2   mongos                              0x00000001008d156b _ZN5mongo13fassertFailedEi + 139
       3   mongos                              0x000000010000c180 _ZN5mongo7fassertEib + 48
       4   mongos                              0x000000010070c17b _ZN5mongo20DBClientMultiCommand7sendAllEv + 197
       5   mongos                              0x00000001007ee267 _ZN5mongo14BatchWriteExec12executeBatchERKNS_21BatchedCommandRequestEPNS_22BatchedCommandResponseE + 2811
       6   mongos                              0x000000010064ab68 _ZN5mongo13ClusterWriter10shardWriteERKNS_21BatchedCommandRequestEPNS_22BatchedCommandResponseE + 948
       7   mongos                              0x000000010064c7b1 _ZN5mongo13ClusterWriter5writeERKNS_21BatchedCommandRequestEPNS_22BatchedCommandResponseE + 3811
       8   mongos                              0x000000010065e0d9 _ZN5mongo15ClusterWriteCmd3runERKSsRNS_7BSONObjEiRSsRNS_14BSONObjBuilderEb + 633
       9   mongos                              0x000000010077e91d _ZN5mongo7Command22execCommandClientBasicEPS0_RNS_11ClientBasicEiPKcRNS_7BSONObjERNS_14BSONObjBuilderEb + 1339
       10  mongos                              0x0000000100690285 _ZN5mongo7Command20runAgainstRegisteredEPKcRNS_7BSONObjERNS_14BSONObjBuilderEi + 941
       11  mongos                              0x00000001007a5a2f _ZN5mongo8Strategy7writeOpEiRNS_7RequestE + 781
       12  mongos                              0x000000010077d5b9 _ZN5mongo7Request7processEi + 1817
       13  mongos                              0x000000010000565f _ZN5mongo21ShardedMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortEPNS_9LastErrorE + 243
       14  mongos                              0x000000010091087e _ZN5mongo17PortMessageServer17handleIncomingMsgEPv + 2302
       15  mongos                              0x000000010090ea01 _ZN5boost3_bi5list1INS0_5valueIPN5mongo17PortMessageServer22HandleIncomingMsgParamEEEEclIPvPFSA_SA_ENS0_5list0EEET_NS0_4typeISE_EERT0_RT1_l + 79
       16  mongos                              0x000000010090ea66 _ZN5boost3_bi6bind_tIPvPFS2_S2_ENS0_5list1INS0_5valueIPN5mongo17PortMessageServer22HandleIncomingMsgParamEEEEEEclEv + 82
       17  mongos                              0x000000010090eaa1 _ZN5boost6detail11thread_dataINS_3_bi6bind_tIPvPFS4_S4_ENS2_5list1INS2_5valueIPN5mongo17PortMessageServer22HandleIncomingMsgParamEEEEEEEE3runEv + 37
       18  mongos                              0x0000000100a09879 thread_proxy + 169
       19  libsystem_c.dylib                   0x00007fff8e38a772 _pthread_start + 327
      2014-04-02T16:16:21.170-0400 [conn5]
       
      ***aborting after fassert() failure
      
      

      I believe the issue is here: https://github.com/mongodb/mongo/blob/master/src/mongo/s/dbclient_shard_resolver.cpp#L44 If we have a shard called "admin" or "config", this function will return a connection to the config servers.

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            Assignee:
            janna.golden Janna Golden
            Reporter:
            sverch Shaun Verch
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              Updated:
              Resolved: