Hi Abhishek, Can you try with the recent MPICH release to see if the same error happens? You can download the recent release, 3.1.2, from http://www.mpich.org/downloads/. Thanks, Sangmin On Sep 12, 2014, at 12:59 PM, Abhishek Bhat <[email protected]<mailto:[email protected]>> wrote: I am running a photochemical modeling on Linux cluster (CentOS_64 bit) with 1 master and 8 slave nodes with quad core (intel i7) on each node. I have two scenarios, in first scenario, I am running less data intensive run on all 8 nodes (NUMPROCS = 9) and the run will go fine. When running same configuration for a more intense run, I am getting following error. Fatal error in MPI_Recv: Other MPI error, error stack: MPI_Recv(187).....................: MPI_Recv(buf=0x7fff989d53b0, count=644490, MPI_REAL, src=1, tag=14131, MPI_COMM_WORLD, status=0x7fff995d96a0) failed MPIDI_CH3I_Progress(150)..........: MPID_nem_mpich2_blocking_recv(948): MPID_nem_tcp_connpoll(1720).......: state_commrdy_handler(1556).......: MPID_nem_tcp_recv_handler(1446)...: socket closed rank 1 in job 1 dfw-camx_55000 caused collective abort of all ranks exit status of rank 1: killed by signal 9 If I run the program with smaller nodes (smaller than 7 NUMPROCS) the run goes fine. It appears that the rank 1 (my first node) is collectively causing all the ranks, but I could identify why. I tried following solutions – 1. Increased master memory to 32 gb 2. Increased all nodes memory to 32 gb 3. Exchanged the rank 1 to different node in the parallel. In all situations, I am getting this error. Surprisingly, when I am running smaller (less data intensive runs), I am not getting this error even if I increase the NUMPROCS to 32 processes. Any help will be highly appreciated. I am running mpich 1.4 Thank You Abhishek …………………………………………………………………………………………………. Abhishek Bhat, PhD, EPI, Senior Consultant Trinity Consultants 12770 Merit Drive, Suite 900 | Dallas, Texas 75251 Office: 972-661-8100| Mobile: 806-281-7617 Email: [email protected]<mailto:[email protected]> | LinkedIn: www.linkedin.com/in/abhattrinityconsultants<http://www.linkedin.com/in/abhattrinityconsultants> Stay current on environmental issues. Subscribe<http://www.trinityconsultants.com/Subscribe/> today to receive Trinity's free Environmental Quarterly<http://www.trinityconsultants.com/EnvironmentalQuarterly/>. Learn about Trinity’s courses<http://www.trinityconsultants.com/Training/> for environmental professionals. <image001.gif><http://www.linkedin.com/company/trinity-consultants> <image002.gif><http://www.facebook.com/TrinityConsults> <image003.gif><http://twitter.com/trinityconsults> <image004.gif><http://www.youtube.com/trinityconsultants> <image005.jpg> _________________________________________________________________________ The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer. _________________________________________________________________________ _______________________________________________ discuss mailing list [email protected]<mailto:[email protected]> To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss