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https://issues.apache.org/jira/browse/HDFS-17311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17801962#comment-17801962
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ASF GitHub Bot commented on HDFS-17311:
---------------------------------------
slfan1989 commented on code in PR #6392:
URL: https://github.com/apache/hadoop/pull/6392#discussion_r1439961113
##########
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:
Sorry, I don’t understand the meaning of this change. Can we explain the
reason for this change?
> RBF: ConnectionManager creatorQueue should offer a pool that is not already
> in creatorQueue.
> --------------------------------------------------------------------------------------------
>
> Key: HDFS-17311
> URL: https://issues.apache.org/jira/browse/HDFS-17311
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: liuguanghua
> Priority: Major
> Labels: pull-request-available
>
> 2023-12-29 15:18:54,799 ERROR
> org.apache.hadoop.hdfs.server.federation.router.ConnectionManager: Cannot add
> more than 2048 connections at the same time
> In my environment, ConnectionManager creatorQueue is full ,but the cluster
> does not have so many users cloud reach up 2048 pair of <user,nn> in router.
> In the case of a large number of concurrent creatorQueue add same pool more
> than once.
>
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