Haozi, I re-ran your example with mpich 3.1.3 and saw the behavior you described in #2. The current mpich/master does not behave like this. Can you try a nightly tarball to confirm? http://www.mpich.org/static/downloads/nightly/master/mpich/ Ken On 02/02/2015 08:02 PM, haozi wrote:

Hi, Ken,

which version is your MPICH?

My MPICH is 3.1.3.

At 2015-01-30 04:34:51, "Kenneth Raffenetti" <[email protected]> wrote:

...

Haozi,

I'm not sure I understand the issue you are seeing. Can you include output from this code that illustrates the issue? I tried running with strings both less than and greater than 7 characters with no issue. The port_name is the same length in all cases on my laptop.

Ken

On 01/28/2015 01:56 AM, haozi wrote:

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Hi, guys. My example code is the attachment.

1. What is the naming convention of service_name ? The hydra_nameserver CAN'T accept those strings whose length is less than 7. What's the exact naming convention?

2. The length of port_name by MPI_Loopup_name is different with MPI_Publish_name! You can test my code.

With best regards. Haozi

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