Once in several months, a multi-threaded daemon is getting hanged while executing the nanosleep system call. The usleep value is a static 50ms but the execution doesn't return for at least 80 seconds (where the situation is detected by a watchdog thread and the process get restarted).The system is not loaded or busy when this happens.Any idea regarding a possible reason for this will be welcomed. Thanks!
gef➤ where#0 0x00002b6f126d5b0d in nanosleep () at ../sysdeps/unix/syscall-template.S:82#1 0x00002b6f1270ae04 in usleep (useconds=<optimized out>) at ../sysdeps/unix/sysv/linux/usleep.c:33...gef➤ f 1#1 0x00002b6f1270ae04 in usleep (useconds=<optimized out>) at ../sysdeps/unix/sysv/linux/usleep.c:33gef➤ p/d ts$5 = { tv_sec = 0, tv_nsec = 50000000}# uname -aLinux localhost.localdomain 3.10.0-862.14.4.el7.x86_64 #1 SMP Wed Dec 2 11:36:55 PST 2020 x86_64 x86_64 x86_64 GNU/Linux
