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: 2010-09-24 05:24:05

Hi Matthias,

thanks for looking into this. I'm going to test the trunk (probably
during the weekend, as I'm at work busy with other matters right now)
and report back here.

Cheers,

  Francesco

On Thu, Sep 23, 2010 at 9:41 PM, Matthias Troyer <troyer_at_[hidden]> wrote:
> 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
>
>
>
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