[lucene-solr] branch master updated: SOLR-14525: Test failure

[no...@apache.org]

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noble pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/lucene-solr.git


The following commit(s) were added to refs/heads/master by this push:
     new 552f194  SOLR-14525: Test failure
552f194 is described below

commit 552f1940af3ac5f95bcb1f890ff6619ea9463313
Author: noble <no...@apache.org>
AuthorDate: Tue Jun 2 15:52:49 2020 +1000

    SOLR-14525: Test failure
---
 solr/core/src/java/org/apache/solr/pkg/PackageListeners.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/solr/core/src/java/org/apache/solr/pkg/PackageListeners.java b/solr/core/src/java/org/apache/solr/pkg/PackageListeners.java
index a483514..b5b295f 100644
--- a/solr/core/src/java/org/apache/solr/pkg/PackageListeners.java
+++ b/solr/core/src/java/org/apache/solr/pkg/PackageListeners.java
@@ -23,7 +23,7 @@ import java.lang.ref.SoftReference;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
-
+import java.util.concurrent.CopyOnWriteArrayList;
 import org.apache.solr.core.PluginInfo;
 import org.apache.solr.core.SolrCore;
 import org.apache.solr.logging.MDCLoggingContext;
@@ -42,7 +42,7 @@ public class PackageListeners {
 
   // this registry only keeps a weak reference because it does not want to
   // cause a memory leak if the listener forgets to unregister itself
-  private List<Reference<Listener>> listeners = new ArrayList<>();
+  private List<Reference<Listener>> listeners = new CopyOnWriteArrayList<>();
 
   public synchronized void addListener(Listener listener) {
     listeners.add(new SoftReference<>(listener));