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Ignore deadlock when writing quota caches

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Raphael Michel
2020-07-23 17:48:56 +02:00
parent 829b0041fc
commit 85f546a3a6
1 changed files with 7 additions and 2 deletions
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9
src/pretix/base/services/quotas.py
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@@ -3,7 +3,7 @@ from collections import Counter, defaultdict
from datetime import timedelta from datetime import timedelta
from django.conf import settings from django.conf import settings
from django.db import models from django.db import OperationalError, models
from django.db.models import ( from django.db.models import (
Case, Count, F, Func, Max, OuterRef, Q, Subquery, Sum, Value, When, Case, Count, F, Func, Max, OuterRef, Q, Subquery, Sum, Value, When,
) )
@@ -103,7 +103,12 @@ class QuotaAvailability:
self.results[q] = resp self.results[q] = resp
self._close(quotas) self._close(quotas)
self._write_cache(quotas, now_dt) try:
self._write_cache(quotas, now_dt)
except OperationalError as e:
# Ignore deadlocks when multiple threads try to write to the cache
if 'deadlock' not in str(e).lower():
raise e
def _write_cache(self, quotas, now_dt): def _write_cache(self, quotas, now_dt):
events = {q.event for q in quotas} events = {q.event for q in quotas}