Re: trying to externalize checkpoint to s3

Posted by SHI Xiaogang on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/trying-to-externalize-checkpoint-to-s3-tp13258p13259.html

Hi Sathi,

According to the format specification of URI, "abc-checkpoint" is the host name in the given uri and the path is null. Therefore, FsStateBackend are complaining about the usage of the root directory. 

Maybe "s3:///abc-checkpoint" ("///" instead of "//") is the uri that you want to use. It will put all checkpoints under the path "/abc-checkpoint".

Regards,

Xiaogang

2017-05-23 9:34 GMT+08:00 Sathi Chowdhury <[hidden email]>:

We are  running flink 1.2 in pre production

I am trying to test checkpoint stored in external location in s3

 

I have set these below in flink-conf.yaml

 

state.backend: filesystem

state.checkpoints.dir: s3://abc-checkpoint

state.backend.fs.checkpointdir: s3://abc-checkpoint

 

I get this failure in job manager log

java.lang.Exception: Cannot initialize File System State Backend with URI 's3://abc-checkpoint.

        at org.apache.flink.runtime.state.filesystem.FsStateBackendFactory.createFromConfig(FsStateBackendFactory.java:57)

        at org.apache.flink.streaming.runtime.tasks.StreamTask.createStateBackend(StreamTask.java:719)

        at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:223)

        at org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)

        at java.lang.Thread.run(Thread.java:745)

Caused by: java.lang.IllegalArgumentException: Cannot use the root directory for checkpoints.

        at org.apache.flink.runtime.state.filesystem.FsStateBackend.validateAndNormalizeUri(FsStateBackend.java:225)

        at org.apache.flink.runtime.state.filesystem.FsStateBackend.<init>(FsStateBackend.java:153)

        at org.apache.flink.runtime.state.filesystem.FsStateBackendFactory.createFromConfig(FsStateBackendFactory.java:5

Any clue? I thought as I am using EMR Hadoop to s3 integration is already working.

Thanks
Sathi

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