Re: [Boost-users] [MPI, serialization] Segmentation fault in heterogeneous cluster

Subject: Re: [Boost-users] [MPI, serialization] Segmentation fault in heterogeneous cluster
From: Francesco Biscani (bluescarni_at_[hidden])
Date: 2010-09-03 12:36:01

Hi Matthias,

probably I'm doing something really stupid, but it seems the problem
is somehow related to shared_ptr. This code reproduces the "MPI
message truncated error":

#include <boost/mpi/environment.hpp>
#include <boost/mpi/communicator.hpp>
#include <boost/serialization/assume_abstract.hpp>
#include <boost/serialization/export.hpp>
#include <boost/serialization/base_object.hpp>
#include <boost/serialization/shared_ptr.hpp>
#include <boost/serialization/tracking.hpp>
#include <boost/serialization/vector.hpp>
#include <boost/shared_ptr.hpp>
#include <vector>

struct base
{
        virtual void do_something() const = 0;
        template <class Archive>
        void serialize(Archive &ar, const unsigned int)
        {
                ar & values;
        }
        std::vector<double> values;
        virtual ~base() {}
};

BOOST_SERIALIZATION_ASSUME_ABSTRACT(base);

struct derived: public base
{
        void do_something() const {};
        template <class Archive>
        void serialize(Archive &ar, const unsigned int)
        {
                ar & boost::serialization::base_object<base>(*this);
        }
};

BOOST_CLASS_EXPORT(derived);

struct container
{
        template <class Archive>
        void serialize(Archive &ar, const unsigned int)
        {
                ar & ptr;
        }
        boost::shared_ptr<base> ptr;
};

int main()
{
        boost::mpi::environment env;
        boost::mpi::communicator world;
        if (world.rank() == 0) {
                boost::shared_ptr<container> c(new container());
                world.send(1,0,c);
                world.recv(1,0,c);
        } else {
                boost::shared_ptr<container> c(new container());
                world.recv(0,0,c);
                world.send(0,0,c);
        }
        return 0;
}

The error happens when rank 1 is receiving the object:

terminate called after throwing an instance of
'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::mpi::exception>
>'
  what():  MPI_Unpack: MPI_ERR_TRUNCATE: message truncated

Thanks,

  Francesco.