From a99ec5ed517b2f2374a73f0c6e9298c8d8f17802 Mon Sep 17 00:00:00 2001
From: akwizgran <michael@briarproject.org>
Date: Fri, 8 Apr 2022 15:24:43 +0100
Subject: [PATCH] Fix a race condition when starting a transaction during
 shutdown.

---
 .../main/java/org/briarproject/bramble/db/JdbcDatabase.java | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/bramble-core/src/main/java/org/briarproject/bramble/db/JdbcDatabase.java b/bramble-core/src/main/java/org/briarproject/bramble/db/JdbcDatabase.java
index 3ae8f7255..539304474 100644
--- a/bramble-core/src/main/java/org/briarproject/bramble/db/JdbcDatabase.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/db/JdbcDatabase.java
@@ -582,7 +582,13 @@ abstract class JdbcDatabase implements Database<Connection> {
 				txn.setAutoCommit(false);
 				connectionsLock.lock();
 				try {
+					// The DB may have been closed since the check above
+					if (closed) {
+						tryToClose(txn, LOG, WARNING);
+						throw new DbClosedException();
+					}
 					openConnections++;
+					connectionsChanged.signalAll();
 				} finally {
 					connectionsLock.unlock();
 				}