[jira] [Commented] (FLINK-10954) Hardlink from files of previous local stored state might cross devices

["Yun Tang (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-10954?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17294233#comment-17294233 ] 

Yun Tang commented on FLINK-10954:
----------------------------------

[~dhill@promoted.ai], your problem occurs due to the incorrect setting to {{taskmanager.state.local.root-dirs}}, please remove {{file://}} prefix.

> Hardlink from files of previous local stored state might cross devices
> ----------------------------------------------------------------------
>
>                 Key: FLINK-10954
>                 URL: https://issues.apache.org/jira/browse/FLINK-10954
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / State Backends
>    Affects Versions: 1.6.2
>            Reporter: Yun Tang
>            Assignee: Yun Tang
>            Priority: Critical
>
> Currently, local recovery's base directories is initialized from '{{io.tmp.dirs}}' if parameter '{{taskmanager.state.local.root-dirs}}' is not set. For Yarn environment, the tmp dirs is replaced by its '{{LOCAL_DIRS}}', which might consist of directories from different devices, such as /dump/1/nm-local-dir, /dump/2/nm-local-dir. The local directory for RocksDB is initialized from IOManager's spillingDirectories, which might located in different device from local recovery's folder. However, hard-link between different devices is not allowed, it will throw exception below:
> {code:java}
> java.nio.file.FileSystemException: target -> souce: Invalid cross-device link
> {code}



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