sos status errors out on a cluster headnode

[BoPeng]

$ sos status
WARNING: INFO: t4t485980d519c783 started
INFO: Note: NumExpr detected 24 cores but "NUMEXPR_MAX_THREADS" not set, so enforcing safe limit of 8.
INFO: NumExpr defaulting to 8 threads.

ERROR:

In general I think sos status is too expensive. Instead of updating a pulse file for each process, all tasks should perhaps update a single object, perhaps a sqlite database.