From 47817b55589855c09210f7df976dd9e877acc2c7 Mon Sep 17 00:00:00 2001
From: Martin Ledvinka <martin.ledvinka@fel.cvut.cz>
Date: Mon, 12 Aug 2024 14:40:37 +0200
Subject: [PATCH] [Fix] Prevent ConcurrentModificationException in
 ScheduledContextRemover.

The exception was likely caused by adding to the collection while it was being iterated during context removal.
---
 .../termit/persistence/dao/util/ScheduledContextRemover.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/cz/cvut/kbss/termit/persistence/dao/util/ScheduledContextRemover.java b/src/main/java/cz/cvut/kbss/termit/persistence/dao/util/ScheduledContextRemover.java
index fb82b4228..326fe0ab0 100644
--- a/src/main/java/cz/cvut/kbss/termit/persistence/dao/util/ScheduledContextRemover.java
+++ b/src/main/java/cz/cvut/kbss/termit/persistence/dao/util/ScheduledContextRemover.java
@@ -54,7 +54,7 @@ public synchronized void scheduleForRemoval(@NonNull URI contextUri) {
      */
     @Transactional
     @Scheduled(fixedRate = 1, timeUnit = TimeUnit.MINUTES)
-    public void runContextRemoval() {
+    public synchronized void runContextRemoval() {
         LOG.trace("Running scheduled repository context removal.");
         contextsToRemove.forEach(g -> {
             LOG.trace("Dropping repository context {}.", Utils.uriToString(g));