Re: trying to externalize checkpoint to s3

Posted by Ted Yu on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/trying-to-externalize-checkpoint-to-s3-tp13258p13260.html

Adding back user@

Please check the hadoop-common jar in the classpath.

On Mon, May 22, 2017 at 7:12 PM, Sathi Chowdhury <[hidden email]> wrote:

Tried it ,

It does not fail like before but a new error popped up..looks like a jar problem(clash ) to me

thanks

java.lang.Exception: Error while triggering checkpoint 2 for Source: Custom Source (1/1)

        at org.apache.flink.runtime.taskmanager.Task$3.run(Task.java:1120)

        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

        at java.util.concurrent.FutureTask.run(FutureTask.java:266)

        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

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

Caused by: java.lang.NoSuchMethodError: org.apache.hadoop.conf.Configuration.addResource(Lorg/apache/hadoop/conf/Configuration;)V

        at com.amazon.ws.emr.hadoop.fs.EmrFileSystem.initialize(EmrFileSystem.java:95)

        at org.apache.flink.runtime.fs.hdfs.HadoopFileSystem.initialize(HadoopFileSystem.java:320)

        at org.apache.flink.core.fs.FileSystem.getUnguardedFileSystem(FileSystem.java:271)

        at org.apache.flink.core.fs.FileSystem.get(FileSystem.java:310)

        at org.apache.flink.core.fs.Path.getFileSystem(Path.java:293)

        at org.apache.flink.runtime.state.filesystem.FsCheckpointStreamFactory.<init>(FsCheckpointStreamFactory.java:105)

        at org.apache.flink.runtime.state.filesystem.FsStateBackend.createStreamFactory(FsStateBackend.java:172)

        at org.apache.flink.streaming.runtime.tasks.StreamTask$CheckpointingOperation.createStreamFactory(StreamTask.java:1155)

        at org.apache.flink.streaming.runtime.tasks.StreamTask$CheckpointingOperation.checkpointStreamOperator(StreamTask.java:1137)

        at org.apache.flink.streaming.runtime.tasks.StreamTask$CheckpointingOperation.executeCheckpointing(StreamTask.java:1076)

        at org.apache.flink.streaming.runtime.tasks.StreamTask.checkpointState(StreamTask.java:641)

        at org.apache.flink.streaming.runtime.tasks.StreamTask.performCheckpoint(StreamTask.java:586)

        at org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpoint(StreamTask.java:529)

        at org.apache.flink.runtime.taskmanager.Task$3.run(Task.java:1111)

        ... 5 common frames omitted

 

 

From: Ted Yu <[hidden email]>
Date: Monday, May 22, 2017 at 6:52 PM
To: Sathi Chowdhury <[hidden email]>
Subject: Re: trying to externalize checkpoint to s3

 

Have you tried specifying subdirectory such as the following ?

 

s3://abc-checkpoint/subdir

 

On Mon, May 22, 2017 at 6:34 PM, Sathi Chowdhury <[hidden email]> wrote:

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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