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Subject: [OMPI users] Open MPI error MPI_ERR_TRUNCATE: message truncated
From: Jack Bryan (dtustudy68_at_[hidden])
Date: 2010-07-07 11:42:14

Dear All:
I need to transfer some messages from workers master node on MPI cluster with Open MPI.
The number of messages is fixed.
When I increase the number of worker nodes, i got error:
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[n231:45873] *** Process received signal ***[n231:45873] Signal: Aborted (6)[n231:45873] Signal code: (-6)[n231:45873] [ 0] /lib64/ [0x3c50e0e4c0][n231:45873] [ 1] /lib64/ [0x3c50230215][n231:45873] [ 2] /lib64/ [0x3c50231cc0]

For 40 workers , it works well.
But for 50 workers, it got this error.
The largest message size is not more then 72 bytes.
Any help is appreciated.
July 7 2010
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