portable server library intermittent hang on UNIX systems

[Jeff Hill]

The portable server is obliged to use an additional socket
binding to the broadcast address of the interface when
running on UNIX. Unfortunately, when changing the primary
socket to non-blocking mode, the code failed to also set
this additional socket to non-blocking mode. This caused
a hang until the input buffer fills on UNIX systems, but this was not noticed because on many EPICS systems there
is sufficent broadcast traffic to make any associated
delay small. Also, if EPICS_CA_MAX_ARRAY_BYTES is small
then the problem is less likely to occur.

Additional information:

See also Mantis 176

Original Mantis Bug: mantis-196
    http://www.aps.anl.gov/epics/mantis/view_bug_page.php?f_id=196

[Jeff Hill (johill-lanl)]

fixed in R3.14.8

[Andrew Johnson (anj)]

R3.14.8 Release.