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https://issues.apache.org/jira/browse/FLINK-6511?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16038469#comment-16038469
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Fang Yong commented on FLINK-6511:
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[~till.rohrmann] In the {{retrieveClassLoader}} of {{JobClient}}, I find that
the {{BlobCache}} was not closed before {{FlinkUserCodeClassLoader}} is
returned. The descripe of this issue means to close {{BlobCache}} before
{{retrieveClassLoader}} method returning?
> JobClient does not properly clean up BlobCache resources
> --------------------------------------------------------
>
> Key: FLINK-6511
> URL: https://issues.apache.org/jira/browse/FLINK-6511
> Project: Flink
> Issue Type: Bug
> Components: Client
> Affects Versions: 1.3.0
> Reporter: Till Rohrmann
> Assignee: Fang Yong
>
> The {{JobClient}} creates a {{BlobCache}} to download user code jars from the
> {{BlobServer}} when trying to retrieve the user code class loader. This
> {{BlobCache}} won't be properly closed, though. I think it would be better to
> instantiate a {{BlobCache}} in the {{JobClient}} and close once the
> {{JobClient}} is being closed.
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