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https://issues.apache.org/jira/browse/FLINK-9525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16502161#comment-16502161
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Steve Loughran commented on FLINK-9525:
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we're actually moving Hadoop off that introspection mechanism for dynamic class
loading (if someone can do it), because its so expensive...it force loads all
the classes under the FS impl even if you aren't using the class. I think I'd
like some lighter weight service declaration class which only contained some
info fields (real implementation class, URL of provider), so was low cost to
load.
> Missing META-INF/services/*FileSystemFactory in flink-hadoop-fs module
> ----------------------------------------------------------------------
>
> Key: FLINK-9525
> URL: https://issues.apache.org/jira/browse/FLINK-9525
> Project: Flink
> Issue Type: Bug
> Components: FileSystem
> Affects Versions: 1.4.0, 1.5.0, 1.6.0
> Reporter: Hai Zhou
> Assignee: Hai Zhou
> Priority: Blocker
> Fix For: 1.6.0, 1.5.1
>
> Attachments: [email protected]
>
>
> if flink job dependencies includes `hadoop-common` and `hadoop-hdfs`, will
> throw runtime error.
> like this case:
> [https://stackoverflow.com/questions/47890596/java-util-serviceconfigurationerror-org-apache-hadoop-fs-filesystem-provider-o].
> the root cause:
> see {{org.apache.flink.core.fs.FileSystem}}
> This class will load all available file system factories via
> {{ServiceLoader.load(FileSystemFactory.class)}}.
> Since {{ META-INF / services / org.apache.flink.core.fs.FileSystemFactory }}
> file in the classpath does not have an
> `org.apache.flink.runtime.fs.hdfs.HadoopFsFactory`,
> and finaly only loaded one available {{LocalFileSystemFactory}} .
> more error messages see this screenshot.
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