diff -Nru cherrypy3-8.9.1/debian/changelog cherrypy3-8.9.1/debian/changelog
--- cherrypy3-8.9.1/debian/changelog	2020-10-14 15:31:32.000000000 +0000
+++ cherrypy3-8.9.1/debian/changelog	2021-03-01 18:19:50.000000000 +0000
@@ -1,3 +1,10 @@
+cherrypy3 (8.9.1-8) unstable; urgency=medium
+
+  * Add patch 0005: replace removed threading.Thread.isAlive() method
+    with is_alive(). Closes: #983754
+
+ -- JCF Ploemen (jcfp) <linux@jcf.pm>  Mon, 01 Mar 2021 18:19:50 +0000
+
 cherrypy3 (8.9.1-7) unstable; urgency=medium
 
   * Team upload
diff -Nru cherrypy3-8.9.1/debian/patches/0005-fix-use-of-isAlive.patch cherrypy3-8.9.1/debian/patches/0005-fix-use-of-isAlive.patch
--- cherrypy3-8.9.1/debian/patches/0005-fix-use-of-isAlive.patch	1970-01-01 00:00:00.000000000 +0000
+++ cherrypy3-8.9.1/debian/patches/0005-fix-use-of-isAlive.patch	2021-03-01 18:19:50.000000000 +0000
@@ -0,0 +1,42 @@
+# Replace removed threading.Thread.isAlive() method with is_alive()
+
+--- cherrypy3-8.9.1.orig/cherrypy/process/wspbus.py
++++ cherrypy3-8.9.1/cherrypy/process/wspbus.py
+@@ -342,7 +342,7 @@ class Bus(object):
+             # that another thread executes cherrypy.engine.exit()
+             if (
+                     t != threading.currentThread() and
+-                    t.isAlive() and
++                    t.is_alive() and
+                     not isinstance(t, threading._MainThread)
+             ):
+                 # Note that any dummy (external) threads are always daemonic.
+--- cherrypy3-8.9.1.orig/cherrypy/wsgiserver/__init__.py
++++ cherrypy3-8.9.1/cherrypy/wsgiserver/__init__.py
+@@ -1671,7 +1671,7 @@ class ThreadPool(object):
+         # Grow/shrink the pool if necessary.
+         # Remove any dead threads from our list
+         for t in self._threads:
+-            if not t.isAlive():
++            if not t.is_alive():
+                 self._threads.remove(t)
+                 amount -= 1
+ 
+@@ -1699,7 +1699,7 @@ class ThreadPool(object):
+             endtime = time.time() + timeout
+         while self._threads:
+             worker = self._threads.pop()
+-            if worker is not current and worker.isAlive():
++            if worker is not current and worker.is_alive():
+                 try:
+                     if timeout is None or timeout < 0:
+                         worker.join()
+@@ -1707,7 +1707,7 @@ class ThreadPool(object):
+                         remaining_time = endtime - time.time()
+                         if remaining_time > 0:
+                             worker.join(remaining_time)
+-                        if worker.isAlive():
++                        if worker.is_alive():
+                             # We exhausted the timeout.
+                             # Forcibly shut down the socket.
+                             c = worker.conn
diff -Nru cherrypy3-8.9.1/debian/patches/series cherrypy3-8.9.1/debian/patches/series
--- cherrypy3-8.9.1/debian/patches/series	2020-10-14 15:31:32.000000000 +0000
+++ cherrypy3-8.9.1/debian/patches/series	2021-03-01 18:19:50.000000000 +0000
@@ -2,3 +2,4 @@
 0002-use-mock.mock-instead-of-unittest.mock.patch
 0003-disable-test_antistampede.patch
 0004-unrepr-also-from-__builtin__.patch
+0005-fix-use-of-isAlive.patch