From: Daniel Salzman <daniel.salzman@nic.cz>
Date: Thu, 7 Apr 2022 13:02:01 +0000 (+0200)
Subject: conf: call mdb_reader_check() if confdb opening fails
X-Git-Tag: v3.3.dev~151^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f404602bbfe5211811c022ebc66a4bbdb4bc1de9;p=thirdparty%2Fknot-dns.git

conf: call mdb_reader_check() if confdb opening fails
---

diff --git a/src/libknot/db/db_lmdb.c b/src/libknot/db/db_lmdb.c
index 9341f5dd9e..b5eae0944a 100644
--- a/src/libknot/db/db_lmdb.c
+++ b/src/libknot/db/db_lmdb.c
@@ -1,4 +1,4 @@
-/*  Copyright (C) 2021 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+/*  Copyright (C) 2022 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -181,6 +181,13 @@ static int dbase_open(struct lmdb_env *env, struct knot_db_lmdb_opts *opts)
 	/* Open the database. */
 	MDB_txn *txn = NULL;
 	int ret = mdb_txn_begin(env->env, NULL, flags, &txn);
+	if (ret == MDB_READERS_FULL) {
+		int cleared = 0;
+		ret = mdb_reader_check(env->env, &cleared);
+		if (ret == MDB_SUCCESS) {
+			ret = mdb_txn_begin(env->env, NULL, flags, &txn);
+		}
+	}
 	if (ret != MDB_SUCCESS) {
 		mdb_env_close(env->env);
 		return lmdb_error_to_knot(ret);