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HADOOP-15865. ConcurrentModificationException in Configuration.overlay() method. Contributed by Oleksandr Shevchenko.

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(cherry picked from commit e872ceb810a343da7fce7185dca78d3b9aad9b7b)
(cherry picked from commit 46e72775f5b2156f49b15beac8bffff9cd5aad7f)
This commit is contained in:
Wei-Chiu Chuang 2019-08-01 19:56:51 -07:00
parent 8fc4e406ad
commit 72ef752876
1 changed files with 4 additions and 2 deletions
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6
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/Configuration.java
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@ -3395,8 +3395,10 @@ private void readTagFromConfig(String attributeValue, String confName, String
}
private void overlay(Properties to, Properties from) {
for (Entry<Object, Object> entry: from.entrySet()) {
to.put(entry.getKey(), entry.getValue());
synchronized (from) {
for (Entry<Object, Object> entry : from.entrySet()) {
to.put(entry.getKey(), entry.getValue());
}
}
}