From c7b333c545adf8958ec97771e6816ceb5e83f524 Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Mon, 25 Feb 2019 16:56:41 +0000
Subject: [PATCH 1/2] Log tracebacks correctly

---
 synapse/federation/federation_server.py | 5 +++--
 synapse/handlers/pagination.py          | 6 +++++-
 synapse/http/server.py                  | 8 ++++----
 3 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py
index 3da86d4ba6..8f45c2badf 100644
--- a/synapse/federation/federation_server.py
+++ b/synapse/federation/federation_server.py
@@ -239,8 +239,9 @@ class FederationServer(FederationBase):
                         f = failure.Failure()
                         pdu_results[event_id] = {"error": str(e)}
                         logger.error(
-                            "Failed to handle PDU %s: %s",
-                            event_id, f.getTraceback().rstrip(),
+                            "Failed to handle PDU %s",
+                            event_id,
+                            exc_info=(f.type, f.value, f.getTracebackObject()),
                         )
 
         yield concurrently_execute(
diff --git a/synapse/handlers/pagination.py b/synapse/handlers/pagination.py
index 084c1503da..e4fdae9266 100644
--- a/synapse/handlers/pagination.py
+++ b/synapse/handlers/pagination.py
@@ -136,7 +136,11 @@ class PaginationHandler(object):
             logger.info("[purge] complete")
             self._purges_by_id[purge_id].status = PurgeStatus.STATUS_COMPLETE
         except Exception:
-            logger.error("[purge] failed: %s", Failure().getTraceback().rstrip())
+            f = Failure()
+            logger.error(
+                "[purge] failed",
+                exc_info=(f.type, f.value, f.getTracebackObject()),
+            )
             self._purges_by_id[purge_id].status = PurgeStatus.STATUS_FAILED
         finally:
             self._purges_in_progress_by_room.discard(room_id)
diff --git a/synapse/http/server.py b/synapse/http/server.py
index 6c67a25a11..16fb7935da 100644
--- a/synapse/http/server.py
+++ b/synapse/http/server.py
@@ -169,18 +169,18 @@ def _return_html_error(f, request):
             )
         else:
             logger.error(
-                "Failed handle request %r: %s",
+                "Failed handle request %r",
                 request,
-                f.getTraceback().rstrip(),
+                exc_info=(f.type, f.value, f.getTracebackObject()),
             )
     else:
         code = http_client.INTERNAL_SERVER_ERROR
         msg = "Internal server error"
 
         logger.error(
-            "Failed handle request %r: %s",
+            "Failed handle request %r",
             request,
-            f.getTraceback().rstrip(),
+            exc_info=(f.type, f.value, f.getTracebackObject()),
         )
 
     body = HTML_ERROR_TEMPLATE.format(

From 1d0f2ec8127fa74db41316f588c8a202c9e91275 Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Mon, 25 Feb 2019 17:02:31 +0000
Subject: [PATCH 2/2] Newsfile

---
 changelog.d/4669.misc | 2 +-
 changelog.d/4737.misc | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)
 create mode 100644 changelog.d/4737.misc

diff --git a/changelog.d/4669.misc b/changelog.d/4669.misc
index 00a1a940ae..d5d0e27731 100644
--- a/changelog.d/4669.misc
+++ b/changelog.d/4669.misc
@@ -1 +1 @@
-Cleanup request exception logging
+Cleanup request exception logging.
diff --git a/changelog.d/4737.misc b/changelog.d/4737.misc
new file mode 100644
index 0000000000..d5d0e27731
--- /dev/null
+++ b/changelog.d/4737.misc
@@ -0,0 +1 @@
+Cleanup request exception logging.