Revert accidental fast-forward merge from v1.49.0rc1

Revert "Sort internal changes in changelog"
Revert "Update CHANGES.md"
Revert "1.49.0rc1"
Revert "Revert "Move `glob_to_regex` and `re_word_boundary` to `matrix-python-common` (#11505) (#11527)"
Revert "Refactors in `_generate_sync_entry_for_rooms` (#11515)"
Revert "Correctly register shutdown handler for presence workers (#11518)"
Revert "Fix `ModuleApi.looping_background_call` for non-async functions (#11524)"
Revert "Fix 'delete room' admin api to work on incomplete rooms (#11523)"
Revert "Correctly ignore invites from ignored users (#11511)"
Revert "Fix the test breakage introduced by #11435 as a result of concurrent PRs (#11522)"
Revert "Stabilise support for MSC2918 refresh tokens as they have now been merged into the Matrix specification. (#11435)"
Revert "Save the OIDC session ID (sid) with the device on login (#11482)"
Revert "Add admin API to get some information about federation status (#11407)"
Revert "Include bundled aggregations in /sync and related fixes (#11478)"
Revert "Move `glob_to_regex` and `re_word_boundary` to `matrix-python-common` (#11505)"
Revert "Update backward extremity docs to make it clear that it does not indicate whether we have fetched an events' `prev_events` (#11469)"
Revert "Support configuring the lifetime of non-refreshable access tokens separately to refreshable access tokens. (#11445)"
Revert "Add type hints to `synapse/tests/rest/admin` (#11501)"
Revert "Revert accidental commits to develop."
Revert "Newsfile"
Revert "Give `tests.server.setup_test_homeserver` (nominally!) the same behaviour"
Revert "Move `tests.utils.setup_test_homeserver` to `tests.server`"
Revert "Convert one of the `setup_test_homeserver`s to `make_test_homeserver_synchronous`"
Revert "Disambiguate queries on `state_key` (#11497)"
Revert "Comments on the /sync tentacles (#11494)"
Revert "Clean up tests.storage.test_appservice (#11492)"
Revert "Clean up `tests.storage.test_main` to remove use of legacy code. (#11493)"
Revert "Clean up `tests.test_visibility` to remove legacy code. (#11495)"
Revert "Minor cleanup on recently ported doc pages  (#11466)"
Revert "Add most of the missing type hints to `synapse.federation`. (#11483)"
Revert "Avoid waiting for zombie processes in `synctl stop` (#11490)"
Revert "Fix media repository failing when media store path contains symlinks (#11446)"
Revert "Add type annotations to `tests.storage.test_appservice`. (#11488)"
Revert "`scripts-dev/sign_json`: support for signing events (#11486)"
Revert "Add MSC3030 experimental client and federation API endpoints to get the closest event to a given timestamp (#9445)"
Revert "Port wiki pages to documentation website (#11402)"
Revert "Add a license header and comment. (#11479)"
Revert "Clean-up get_version_string (#11468)"
Revert "Link background update controller docs to summary (#11475)"
Revert "Additional type hints for config module. (#11465)"
Revert "Register the login redirect endpoint for v3. (#11451)"
Revert "Update openid.md"
Revert "Remove mention of OIDC certification from Dex (#11470)"
Revert "Add a note about huge pages to our Postgres doc (#11467)"
Revert "Don't start Synapse master process if `worker_app` is set (#11416)"
Revert "Expose worker & homeserver as entrypoints in `setup.py` (#11449)"
Revert "Bundle relations of relations into the `/relations` result. (#11284)"
Revert "Fix `LruCache` corruption bug with a `size_callback` that can return 0 (#11454)"
Revert "Eliminate a few `Any`s in `LruCache` type hints (#11453)"
Revert "Remove unnecessary `json.dumps` from `tests.rest.admin` (#11461)"
Revert "Merge branch 'master' into develop"

This reverts commit 26b5d2320f62b5eb6262c7614fbdfc364a4dfc02.
This reverts commit bce4220f387bf5448387f0ed7d14ed1e41e40747.
This reverts commit 966b5d0fa0893c3b628c942dfc232e285417f46d.
This reverts commit 088d748f2cb51f03f3bcacc0fb3af1e0f9607737.
This reverts commit 14d593f72d10b4d8cb67e3288bb3131ee30ccf59.
This reverts commit 2a3ec6facf79f6aae011d9fb6f9ed5e43c7b6bec.
This reverts commit eccc49d7554d1fab001e1fefb0fda8ffb254b630.
This reverts commit b1ecd19c5d19815b69e425d80f442bf2877cab76.
This reverts commit 9c55dedc8c4484e6269451a8c3c10b3e314aeb4a.
This reverts commit 2d42e586a8c54be1a83643148358b1651c1ca666.
This reverts commit 2f053f3f82ca174cc1c858c75afffae51af8ce0d.
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This reverts commit 8b4b153c9e86c04c7db8c74fde4b6a04becbc461.
This reverts commit 494ebd7347ba52d702802fba4c3bb13e7bfbc2cf.
This reverts commit a77c36989785c0d5565ab9a1169f4f88e512ce8a.
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This reverts commit 7be88fbf48156b36b6daefb228e1258e7d48cae4.
This reverts commit b3fd99b74a3f6f42a9afd1b19ee4c60e38e8e91a.
This reverts commit f7ec6e7d9e0dc360d9fb41f3a1afd7bdba1475c7.
This reverts commit 5640992d176a499204a0756b1677c9b1575b0a49.
This reverts commit d26808dd854006bd26a2366c675428ce0737238c.
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This reverts commit 16d39a5490ce74c901c7a8dbb990c6e83c379207.
This reverts commit 8a4c2969874c0b7d72003f2523883eba8a348e83.
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This reverts commit d2279f471ba8f44d9f578e62b286897a338d8aa1.
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This reverts commit 7b62791e001d6a4f8897ed48b3232d7f8fe6aa48.
This reverts commit 153194c7717d8016b0eb974c81b1baee7dc1917d.
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This reverts commit a265fbd397ae72b2d3ea4c9310591ff1d0f3e05c.
This reverts commit b9fef1a7cdfcc128fa589a32160e6aa7ed8964d7.
This reverts commit b0eb64ff7bf6bde42046e091f8bdea9b7aab5f04.
This reverts commit f1795463bf503a6fca909d77f598f641f9349f56.
This reverts commit 70cbb1a5e311f609b624e3fae1a1712db639c51e.
This reverts commit 42bf0204635213e2c75188b19ee66dc7e7d8a35e.
This reverts commit 379f2650cf875f50c59524147ec0e33cfd5ef60c.
This reverts commit 7ff22d6da41cd5ca80db95c18b409aea38e49fcd.
This reverts commit 5a0b652d36ae4b6d423498c1f2c82c97a49c6f75.
This reverts commit 432a174bc192740ac7a0a755009f6099b8363ad9.
This reverts commit b14f8a1baf6f500997ae4c1d6a6d72094ce14270, reversing
changes made to e713855dca17a7605bae99ea8d71bc7f8657e4b8.

1 files changed, 28 insertions, 30 deletions

diff --git a/synctl b/synctl
index 0e54f4847b..90559ded62 100755
--- a/synctl
+++ b/synctl
@@ -24,7 +24,7 @@ import signal
 import subprocess
 import sys
 import time
-from typing import Iterable, Optional
+from typing import Iterable
 
 import yaml
 
@@ -41,24 +41,11 @@ NORMAL = "\x1b[m"
 def pid_running(pid):
     try:
         os.kill(pid, 0)
+        return True
     except OSError as err:
         if err.errno == errno.EPERM:
-            pass  # process exists
-        else:
-            return False
-
-    # When running in a container, orphan processes may not get reaped and their
-    # PIDs may remain valid. Try to work around the issue.
-    try:
-        with open(f"/proc/{pid}/status") as status_file:
-            if "zombie" in status_file.read():
-                return False
-    except Exception:
-        # This isn't Linux or `/proc/` is unavailable.
-        # Assume that the process is still running.
-        pass
-
-    return True
+            return True
+        return False
 
 
 def write(message, colour=NORMAL, stream=sys.stdout):
@@ -122,14 +109,15 @@ def start(pidfile: str, app: str, config_files: Iterable[str], daemonize: bool)
         return False
 
 
-def stop(pidfile: str, app: str) -> Optional[int]:
+def stop(pidfile: str, app: str) -> bool:
     """Attempts to kill a synapse worker from the pidfile.
     Args:
         pidfile: path to file containing worker's pid
         app: name of the worker's appservice
 
     Returns:
-        process id, or None if the process was not running
+        True if the process stopped successfully
+        False if process was already stopped or an error occured
     """
 
     if os.path.exists(pidfile):
@@ -137,7 +125,7 @@ def stop(pidfile: str, app: str) -> Optional[int]:
         try:
             os.kill(pid, signal.SIGTERM)
             write("stopped %s" % (app,), colour=GREEN)
-            return pid
+            return True
         except OSError as err:
             if err.errno == errno.ESRCH:
                 write("%s not running" % (app,), colour=YELLOW)
@@ -145,13 +133,14 @@ def stop(pidfile: str, app: str) -> Optional[int]:
                 abort("Cannot stop %s: Operation not permitted" % (app,))
             else:
                 abort("Cannot stop %s: Unknown error" % (app,))
+            return False
     else:
         write(
             "No running worker of %s found (from %s)\nThe process might be managed by another controller (e.g. systemd)"
             % (app, pidfile),
             colour=YELLOW,
         )
-    return None
+    return False
 
 
 Worker = collections.namedtuple(
@@ -299,23 +288,32 @@ def main():
     action = options.action
 
     if action == "stop" or action == "restart":
-        running_pids = []
+        has_stopped = True
         for worker in workers:
-            pid = stop(worker.pidfile, worker.app)
-            if pid is not None:
-                running_pids.append(pid)
+            if not stop(worker.pidfile, worker.app):
+                # A worker could not be stopped.
+                has_stopped = False
 
         if start_stop_synapse:
-            pid = stop(pidfile, MAIN_PROCESS)
-            if pid is not None:
-                running_pids.append(pid)
+            if not stop(pidfile, MAIN_PROCESS):
+                has_stopped = False
+        if not has_stopped and action == "stop":
+            sys.exit(1)
 
+    # Wait for synapse to actually shutdown before starting it again
+    if action == "restart":
+        running_pids = []
+        if start_stop_synapse and os.path.exists(pidfile):
+            running_pids.append(int(open(pidfile).read()))
+        for worker in workers:
+            if os.path.exists(worker.pidfile):
+                running_pids.append(int(open(worker.pidfile).read()))
         if len(running_pids) > 0:
-            write("Waiting for processes to exit...")
+            write("Waiting for process to exit before restarting...")
             for running_pid in running_pids:
                 while pid_running(running_pid):
                     time.sleep(0.2)
-            write("All processes exited")
+            write("All processes exited; now restarting...")
 
     if action == "start" or action == "restart":
         error = False