Hi On 3 Sep 2010, at 18:36, Francesco Biscani wrote:
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
Hi Francesco, The support for shared_ptr was incomplete. Can you try this example with the current SVN trunk? Matthias