openstack/monasca-notification
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Merge "Fix race condition in notification type inserts"

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Jenkins 2016-08-10 15:42:50 +00:00 committed by Gerrit Code Review
commit 2106901f11
1 changed files with 10 additions and 0 deletions
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10
monasca_notification/common/repositories/mysql/mysql_repo.py
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@ -108,6 +108,16 @@ class MysqlRepo(BaseRepo):
cur = self._mysql.cursor()
cur.executemany(self._insert_notification_types_sql, notification_types)
except pymysql.IntegrityError as ignoredException:
# If multiple instances of the notification engine tries to write the
# same content at the same time, only one of them will succeed and others will
# get duplicate primary key, integrity error. We can safely ignore this error.
# This may happen only during the first start when the tables are empty.
code, mesg = ignoredException.args
if code == pymysql.constants.ER.DUP_ENTRY:
log.debug("Notification type exists in DB. Ignoring the exception {}".format(mesg))
else:
raise exc.DatabaseException(ignoredException)
except pymysql.Error as e:
self._mysql = None
log.exception("Couldn't insert notification types %s", e)