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  1. C++ Driver
  2. CXX-946

mongoclient.dll assertion exception



    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Works as Designed
    • legacy-1.1.1
    • None
    • API


      Hi all,
      I’m having problems using mongoDB with high load.
      The database has about 7200 collections, storing documents in different interval of time; every 1 sec in some cases, every 1 min in other. Each document is composed as
      _id: timestamp
      v1: double
      v2: int
      Each iteration, the application sends all the information to the database; there is no incomplete documents.
      When I start using the application and requesting data, in several times, Mongo returns AssertionException, with code 0 and the following message
      assertion src\mongo\client\dbclientcursor.cpp:228
      According what I found, this message means that the cursor is not longer valid, it’s timed out. I configure the timeout when connecting with mongo server. At the beginning, the timeout was 60 secs. I increased it to 90 secs but it stills returns this error. I even tried to disabled the timeout.
      assertion src\mongo\util\net\message_port.cpp:278

      Each request is handled by different threads
      With low load, even returning these errors, everything keeps running. With high load, randomly, my server stops working on a request for data to some collection (not always the same).
      These errors started when we upgraded to mongo 3; I tested mongo 3.0.7, 3.2.0, 3.2.7 and 3.3.8, and the behavior was the same in all cases.
      In the Windows Event viewer, the error is
      Faulting application name: app.exe, version:, time stamp: 0x5758321a
      Faulting module name: mongoclient.dll, version:, time stamp: 0x5761d4aa
      Exception code: 0xc0000005
      Fault offset: 0x00000000000e1f0d
      Faulting process id: 0x44d4
      Faulting application start time: 0x01d1cbfea9b06353
      Faulting application path: C:\Program Files\MyApp\App\app.exe
      Faulting module path: C:\Program Files\MyApp\App\mongoclient.dll
      Report Id: 2d0ad6f9-37f4-11e6-babf-0aa31160729b

      Windows Server 2008 R2 64 bits.
      RAM: 15 GB
      Mongo C++ legacy driver 1.1.1, compiled with Visual Studio 2010 and boost 1.60.0.
      MongoDB running at localhost, with no replica

      Can anyone help me?




            rassi J Rassi
            mabotta Mariano Botta
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