Hello Developers, I am using Open MPI-1.5.3 for performing experiments with checkpoint and restart. However when the number of nodes is more than 128, restart fails with an segmentation fault.
After debugging the code, I found that the cause of this error is that variables of type int_8 are used at various places for storing the "id"s of the application to be run on each node. One example is in orte_odls_base_default_construct_child_list() in orte/mca/odls/base/odls_base_default_fns.c. Here int8_t *app_idx is used as a pointer array of app_ids of the processes in the job. In my case the app_ids exceed 127 and they are read as a negative numbers. I think there are many other places in the code where int8_t is used to hold the application id. I tried some tricks like changing configure so that int8_t and uint8_t are no defined, hence int16_t is used instead. But I think the function unpack still expects int8_t, looking at the error which is raised -OPAL dss:unpack: got type 7 when expecting type 8 Can someone provide a solution to this. Thank you. Kishor
