Hi Arvid,

Thanks for the response.

I have both the jars under /opt/flink/plugins but I'm still getting the
same error message. Also can someone please provide some pointers on how
entropy works. How should I setup the directory structure?

In the link that you have provided there is a aws-credentials.jar file, not
sure where to get the jar since I don't see it in maven repo.

*Plugins:*

flink-s3-fs-hadoop-1.9.1.jar

flink-s3-fs-presto-1.9.1.jar


*flink-conf:*

high-availability.storageDir: s3p://.../recovery



*Error message:*

Shutting StandaloneSessionClusterEntrypoint down with application status
FAILED. Diagnostics java.io.IOException: Could not create FileSystem for
highly available storage (high-availability.storageDir)

Caused by: org.apache.flink.core.fs.UnsupportedFileSystemSchemeException:
Could not find a file system implementation for scheme 's3p'. The scheme is
not directly supported by Flink and no Hadoop file system to support this
scheme could be loaded.

Caused by: org.apache.flink.core.fs.UnsupportedFileSystemSchemeException:
Hadoop is not in the classpath/dependencies.


Thanks



On Thu, Jan 30, 2020 at 2:37 AM Arvid Heise <ar...@ververica.com> wrote:

> Hi Navneeth,
>
> did you follow the plugin folder structure? [1]
>
> There is another plugin called flink-s3-fs-presto that you can use.
> If you want to use both plugins, use s3a:// for s3-fs-hadoop (output) and
> s3p:// for s3-fs-presto (checkpointing).
>
> [1]
> https://ci.apache.org/projects/flink/flink-docs-master/ops/plugins.html#isolation-and-plugin-structure
>
> On Thu, Jan 30, 2020 at 10:26 AM Navneeth Krishnan <
> reachnavnee...@gmail.com> wrote:
>
>> Hi All,
>>
>> I'm trying to migrate from NFS to S3 for checkpointing and I'm facing few
>> issues. I have flink running in docker with flink-s3-fs-hadoop jar
>> copied to plugins folder. Even after having the jar I'm getting the
>> following error: Caused by:
>> org.apache.flink.core.fs.UnsupportedFileSystemSchemeException: Hadoop is
>> not in the classpath/dependencies. Am I missing something?
>>
>> In the documentation it says "Presto is the recommended file system for
>> checkpointing to S3". How can I enable this? Is there a specific
>> configuration that I need to do for this?
>>
>> Also, I couldn't figure out how the entropy injection works. Should I
>> create the bucket with checkpoints folder and flink will automatically
>> inject an entropy and create a per job checkpoint folder or should I create
>> it?
>>
>> bucket/checkpoints/_entropy_/dashboard-job/
>>
>> s3.entropy.key: _entropy_
>> s3.entropy.length: 4 (default)
>>
>> Thanks
>>
>

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