Re: trying to externalize checkpoint to s3

Posted by Till Rohrmann on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/trying-to-externalize-checkpoint-to-s3-tp13258p13271.html

Hi Sathi,

the last error indicates that you are running Flink on a cluster with an incompatible Hadoop version. Please make sure that you use/build Flink with the Hadoop version you have running on your cluster. Especially make sure that the Hadoop version Flink is built for is compatible with the respective EMR version.

Cheers,

Till 

On Tue, May 23, 2017 at 4:30 AM, Ted Yu <[hidden email]> wrote:

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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