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Date: Fri, 7 Oct 2016 21:03:20 +0000 (UTC)
From: "static-max (JIRA)" <jira@apache.org>
To: issues@flink.apache.org
Message-ID: <JIRA.13010603.1475874176000.767727.1475874200433@Atlassian.JIRA>
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References: <JIRA.13010603.1475874176000@Atlassian.JIRA> <JIRA.13010603.1475874176976@arcas>
Subject: [jira] [Created] (FLINK-4779) Restoring from savepoint fails when
 BucketingSink has not yet created folder
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archived-at: Fri, 07 Oct 2016 21:03:22 -0000

static-max created FLINK-4779:
---------------------------------

             Summary: Restoring from savepoint fails when BucketingSink has not yet created folder
                 Key: FLINK-4779
                 URL: https://issues.apache.org/jira/browse/FLINK-4779
             Project: Flink
          Issue Type: Bug
          Components: filesystem-connector
    Affects Versions: 1.2.0
            Reporter: static-max


When I restore from a savepoint, starting the job fails when the root-folder used by the BucketingSink not yet exists. This may happen in my case, when the source for my sink has not yet emitted any messages and I did not create the folder by hand.

The complete folder structure is not required by the BucketingSink as it will create itermediate folders by itself when creating the bucket.

I suggest that this does not prevent the job from being restarted.

{code}
10/07/2016 22:50:53     Source: Kafka Consumer for X -> (Sink: HDFS for X, Sink: X)(1/1) switched to FAILED
java.lang.Exception: Failed to restore state to function: Error while deleting old pending files.
        at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.restoreState(AbstractUdfStreamOperator.java:184)
        at org.apache.flink.streaming.runtime.tasks.StreamTask.restoreState(StreamTask.java:550)
        at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:255)
        at org.apache.flink.runtime.taskmanager.Task.run(Task.java:609)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException: Error while deleting old pending files.
        at org.apache.flink.streaming.connectors.fs.bucketing.BucketingSink.restoreState(BucketingSink.java:805)
        at org.apache.flink.streaming.connectors.fs.bucketing.BucketingSink.restoreState(BucketingSink.java:139)
        at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.restoreState(AbstractUdfStreamOperator.java:182)
        ... 4 more
Caused by: java.io.FileNotFoundException: File hdfs://server:8020/1/2/3/4/flink does not exist.
        at org.apache.hadoop.hdfs.DistributedFileSystem$DirListingIterator.<init>(DistributedFileSystem.java:948)
        at org.apache.hadoop.hdfs.DistributedFileSystem$DirListingIterator.<init>(DistributedFileSystem.java:927)
        at org.apache.hadoop.hdfs.DistributedFileSystem$19.doCall(DistributedFileSystem.java:872)
        at org.apache.hadoop.hdfs.DistributedFileSystem$19.doCall(DistributedFileSystem.java:868)
        at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
        at org.apache.hadoop.hdfs.DistributedFileSystem.listLocatedStatus(DistributedFileSystem.java:886)
        at org.apache.hadoop.fs.FileSystem.listLocatedStatus(FileSystem.java:1696)
        at org.apache.hadoop.fs.FileSystem$6.<init>(FileSystem.java:1791)
        at org.apache.hadoop.fs.FileSystem.listFiles(FileSystem.java:1787)
        at org.apache.flink.streaming.connectors.fs.bucketing.BucketingSink.restoreState(BucketingSink.java:784)
        ... 6 more
{code}


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