Handle pusher being deleted during processing.

Instead of throwing a StoreError lets break out of processing loop and
mark the pusher as stopped.

1 files changed, 20 insertions, 7 deletions

diff --git a/synapse/push/httppusher.py b/synapse/push/httppusher.py
index 5b15b0dbe7..bd5d53af91 100644
--- a/synapse/push/httppusher.py
+++ b/synapse/push/httppusher.py
@@ -199,13 +199,21 @@ class HttpPusher(object):
                 http_push_processed_counter.inc()
                 self.backoff_delay = HttpPusher.INITIAL_BACKOFF_SEC
                 self.last_stream_ordering = push_action["stream_ordering"]
-                yield self.store.update_pusher_last_stream_ordering_and_success(
-                    self.app_id,
-                    self.pushkey,
-                    self.user_id,
-                    self.last_stream_ordering,
-                    self.clock.time_msec(),
+                pusher_still_exists = (
+                    yield self.store.update_pusher_last_stream_ordering_and_success(
+                        self.app_id,
+                        self.pushkey,
+                        self.user_id,
+                        self.last_stream_ordering,
+                        self.clock.time_msec(),
+                    )
                 )
+                if not pusher_still_exists:
+                    # The pusher has been deleted while we were processing, so
+                    # lets just stop and return.
+                    self.on_stop()
+                    return
+
                 if self.failing_since:
                     self.failing_since = None
                     yield self.store.update_pusher_failing_since(
@@ -234,12 +242,17 @@ class HttpPusher(object):
                     )
                     self.backoff_delay = HttpPusher.INITIAL_BACKOFF_SEC
                     self.last_stream_ordering = push_action["stream_ordering"]
-                    yield self.store.update_pusher_last_stream_ordering(
+                    pusher_still_exists = yield self.store.update_pusher_last_stream_ordering(
                         self.app_id,
                         self.pushkey,
                         self.user_id,
                         self.last_stream_ordering,
                     )
+                    if not pusher_still_exists:
+                        # The pusher has been deleted while we were processing, so
+                        # lets just stop and return.
+                        self.on_stop()
+                        return
 
                     self.failing_since = None
                     yield self.store.update_pusher_failing_since(