dumux listens on TCP-Ports
Having opened TCP ports which are not needed is a security risk. A possible attack can be to inject buffers with arbitrary content. So this should not happen if not otherwise configured. The ports are open on all IPv4-Adresses. I see currently two jobs on hal which have opened TCP Ports 1027 and 1028 for whatever reasons:
root@hal:/var/log# lsof -nP -iTCP -sTCP:LISTEN |grep 1027
test_pnm_ 608139 maziar 15u IPv4 2121895 0t0 TCP *:1027 (LISTEN)
root@hal:/var/log# lsof -nP -iTCP -sTCP:LISTEN |grep 1028
test_darc 771895 nepal 16u IPv4 2944280 0t0 TCP *:1028 (LISTEN)
Process of maziar looks in tool pstree -u
slurm_script(608134)───mpirun(608135)─┬─test_pnm_drop_s(608139)─┬─{test_pnm_drop_s}(608140)
│ └─{test_pnm_drop_s}(608141)
├─{mpirun}(608136)
├─{mpirun}(608137)
└─{mpirun}(608138)
And with ps auxww | grep 608139
maziar 608139 98.8 9.7 11601160 6429192 ? Rl Feb18 7995:05 ./test_pnm_drop_stokes_1p
Process of nepal looks like:
root@hal:/var/log# pstree -u nepal -p
slurm_script(771894)───test_darcy(771895)─┬─orted(771896)─┬─{orted}(771897)
│ ├─{orted}(771898)
│ └─{orted}(771899)
├─{test_darcy}(771900)
└─{test_darcy}(771901)
root@hal:/var/log# ps auxww |grep 771895
nepal 771895 99.9 0.0 238064 29196 ? Rl Feb22 2154:57 ./test_darcy test_darcy.input
It would be interesting to stop this and/or document at least its cause. I have no idea of cause, it can be openmpi related but other things might be possible.