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Posted to dev@giraph.apache.org by "Dionysios Logothetis (Jira)" <ji...@apache.org> on 2020/05/12 23:58:00 UTC

[jira] [Resolved] (GIRAPH-149) Clone Vertex on loading

     [ https://issues.apache.org/jira/browse/GIRAPH-149?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dionysios Logothetis resolved GIRAPH-149.
-----------------------------------------
    Resolution: Fixed

> Clone Vertex on loading
> -----------------------
>
>                 Key: GIRAPH-149
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-149
>             Project: Giraph
>          Issue Type: Bug
>          Components: bsp
>    Affects Versions: 0.1.0, 1.0.0
>            Reporter: Zechao Shang
>            Priority: Minor
>
> AFAIK, it's a documented behavior that Hadoop io reuses instance on loading data. 
> Check BspServiceWorker#readVerticesFromInputSplit, readerVertex maybe reused by RecordReader(at least our SequenceFileVertexReader do), and must be cloned somewhere.
> In my opinion, our inherited RecordReaders should follow the behavior of Hadoop's RecordReader, and the vertex should be cloned in BspServiceWorker#readVerticesFromInputSplit. Just calling org.apache.hadoop.io.WritableUtils.clone will be fine.



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