LiuGuH commented on code in PR #6392:
URL: https://github.com/apache/hadoop/pull/6392#discussion_r1440027525
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hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/ConnectionManager.java:
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@@ -229,7 +229,7 @@ public ConnectionContext getConnection(UserGroupInformation
ugi,
// Add a new connection to the pool if it wasn't usable
if (conn == null || !conn.isUsable()) {
- if (!this.creatorQueue.offer(pool)) {
+ if (!this.creatorQueue.contains(pool) && !this.creatorQueue.offer(pool))
{
Review Comment:
Prevents duplicate pool from being added to the creatorQueue.
getConnection() will be concurrent called, so createQueue will be added
duplicate pool.
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