Fix errors storing large retry intervals.

We have set the max retry interval to a value larger than a postgres or
sqlite int can hold, which caused exceptions when updating the
destinations table.

To fix postgres we need to change the column to a bigint, and for sqlite
we lower the max interval to 2**62 (which is still incredibly long).

2 files changed, 19 insertions, 1 deletions

diff --git a/synapse/storage/schema/delta/56/destinations_retry_interval_type.sql.postgres b/synapse/storage/schema/delta/56/destinations_retry_interval_type.sql.postgres
new file mode 100644
index 0000000000..b9bbb18a91
--- /dev/null
+++ b/synapse/storage/schema/delta/56/destinations_retry_interval_type.sql.postgres
@@ -0,0 +1,18 @@
+/* Copyright 2019 The Matrix.org Foundation C.I.C
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+-- We want to store large retry intervals so we upgrade the column from INT
+-- to BIGINT. We don't need to do this on SQLite.
+ALTER TABLE destinations ALTER retry_interval SET DATA TYPE BIGINT;
diff --git a/synapse/util/retryutils.py b/synapse/util/retryutils.py
index a5f2fbef5c..af69587196 100644
--- a/synapse/util/retryutils.py
+++ b/synapse/util/retryutils.py
@@ -29,7 +29,7 @@ MIN_RETRY_INTERVAL = 10 * 60 * 1000
 RETRY_MULTIPLIER = 5
 
 # a cap on the backoff. (Essentially none)
-MAX_RETRY_INTERVAL = 2 ** 63
+MAX_RETRY_INTERVAL = 2 ** 62
 
 
 class NotRetryingDestination(Exception):