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Posted to dev@bahir.apache.org by "zhang junbo (Jira)" <ji...@apache.org> on 2023/05/30 07:26:00 UTC
[jira] [Commented] (BAHIR-324) JobManager created a kuduReader that was not closed, resulting in an increase in server handles
[ https://issues.apache.org/jira/browse/BAHIR-324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17727366#comment-17727366 ]
zhang junbo commented on BAHIR-324:
-----------------------------------
Yes, i also found this issue. and in jobmanager log ,id print the callstrack log as below: (just open ,not closed kudureader):
!image-2023-05-30-15-25-01-115.png!
> JobManager created a kuduReader that was not closed, resulting in an increase in server handles
> ------------------------------------------------------------------------------------------------
>
> Key: BAHIR-324
> URL: https://issues.apache.org/jira/browse/BAHIR-324
> Project: Bahir
> Issue Type: Bug
> Components: Flink Streaming Connectors
> Affects Versions: Flink-1.1.0
> Reporter: ShiminHuang
> Priority: Critical
> Fix For: Flink-1.1.0
>
> Attachments: image-2023-05-30-15-03-38-388.png, image-2023-05-30-15-04-47-387.png, image-2023-05-30-15-05-33-472.png, image-2023-05-30-15-06-16-063.png, image-2023-05-30-15-25-01-115.png
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> h1. Problem
> {quote}When JobManager starts, the ExecutionJobVertex constructor calls the AbstractKuduInputFormat#createInputSplits method, Causes the KuduReader object to create the KuduClient and KuduSession objects, but ExecutionJobVertex does not call the Kudureader #close() method with the display, causing the Kudu-related handle to remain open after the Flink task is closed. As a result, the number of server handles increases with the number of Flink tasks. As a result, the entire server becomes unavailable{quote}
> h1. Code
> *ExecutionJobVertex#constructor*
> !image-2023-05-30-15-03-38-388.png!
> {*}AbstractKuduInputFormat#createInputSplits{*}{*}{*}
> *!image-2023-05-30-15-04-47-387.png!*
> {*}AbstractKuduInputFormat{*}{*}#startKuduReader{*}
> {*}!image-2023-05-30-15-06-16-063.png!{*}{*}{*}
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