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https://issues.apache.org/jira/browse/HDFS-17080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17742231#comment-17742231
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ASF GitHub Bot commented on HDFS-17080:
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Hexiaoqiao commented on PR #5807:
URL: https://github.com/apache/hadoop/pull/5807#issuecomment-1631742621
@jojochuang Thanks WeiChiu for your help.
@harris233 Would you mind to re-apply, and attach this PR link to the
application form? I will try to trace and approve.
> Fix ec connection leak (GitHub PR#5807)
> ---------------------------------------
>
> Key: HDFS-17080
> URL: https://issues.apache.org/jira/browse/HDFS-17080
> Project: Hadoop HDFS
> Issue Type: Task
> Reporter: Wei-Chiu Chuang
> Priority: Major
> Labels: pull-request-available
>
> Creating this jira to track GitHub PR #5807.
> {quote}Description of PR
> This PR fixes EC connection leak if got exception when constructing reader.
> How was this patch tested?
> Cluster: Presto
> Data: EC
> Query: select col from table(EC data) limit 10
> Presto is a long time running process to deal with query.
> In this case, when it gets 10 records, it will interrupt other threads.
> Other threads may be in constructing reader or getting next record.
> If getting next record is interrupted, it will be caught and Presto will
> close it.
> But if constructing reader is interrupted, Presto cannot close it because
> reader in Presto has not been created.
> So we can observe whether EC connection is closed when doing EC limit query.
> Use netstat command.{quote}
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