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HDFS-16798. HDFS-16798. SerialNumberMap should decrease current counter if the item exist. (#4987). Contributed by ZanderXu. 

Signed-off-by: He Xiaoqiao <hexiaoqiao@apache.org>
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ZanderXu 2022-10-09 18:58:09 +08:00 committed by GitHub
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commit b0bfd09c41
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/SerialNumberMap.java
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@ -68,6 +68,7 @@ public class SerialNumberMap<T> {
} }
Integer old = t2i.putIfAbsent(t, sn); Integer old = t2i.putIfAbsent(t, sn);
if (old != null) { if (old != null) {
current.getAndDecrement();
return old; return old;
} }
i2t.put(sn, t); i2t.put(sn, t);