Use a safe value for timeout

ceph-15.2.4-fix_ceph_thread_timeout.patch

 diff -uNr ceph-15.2.4/src/pybind/ceph_argparse.py ceph-15.2.4-fix_ceph_thread_timeout/src/pybind/ceph_argparse.py
 --- ceph-15.2.4/src/pybind/ceph_argparse.py	2020-07-01 01:10:51.000000000 +0930
-+++ ceph-15.2.4-fix_ceph_thread_timeout/src/pybind/ceph_argparse.py	2020-11-18 18:57:39.711443174 +1030
-@@ -1317,9 +1317,8 @@
++++ ceph-15.2.4-fix_ceph_thread_timeout/src/pybind/ceph_argparse.py	2020-12-27 14:15:28.161241445 +1030
+@@ -1317,9 +1317,11 @@
      if timeout == 0 or timeout == None:
          # python threading module will just get blocked if timeout is `None`,
          # otherwise it will keep polling until timeout or thread stops.
 -        # wait for INT32_MAX, as python 3.6.8 use int32_t to present the
 -        # timeout in integer when converting it to nanoseconds
 -        timeout = (1 << (32 - 1)) - 1
-+        # wait for 5 seconds, as python 3.6.8 use float to present the timeout
-+        timeout = 5.0
++        # timeout in integer when converting it to nanoseconds, but since
++        # python3 uses `int64_t` for the deadline before timeout expires,
++        # we have to use a safe value which does not overflow after being
++        # added to current time in microseconds.
++        timeout = 24 * 60 * 60
      t = RadosThread(func, *args, **kwargs)
  
      # allow the main thread to exit (presumably, avoid a join() on this