[jira] [Closed] (FLINK-17928) Incorrect state size reported when using unaligned checkpoints

["Piotr Nowojski (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-17928?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Piotr Nowojski closed FLINK-17928.
----------------------------------
    Resolution: Fixed

merged to release-1.11 as a9782a2483
merged to master as f89c606f12

> Incorrect state size reported when using unaligned checkpoints 
> ---------------------------------------------------------------
>
>                 Key: FLINK-17928
>                 URL: https://issues.apache.org/jira/browse/FLINK-17928
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Checkpointing
>    Affects Versions: 1.11.0
>            Reporter: Piotr Nowojski
>            Assignee: Roman Khachatryan
>            Priority: Critical
>              Labels: pull-request-available
>             Fix For: 1.11.0
>
>
> Even when checkpoints on HDFS are between 100-300MBs, the reported state size is in orders of magnitude larger with values like:
> {noformat}
> 1GiB  1.5TiB  2.0TiB  2.1TiB  2.1TiB
> 148GiB  148GiB  148GiB  148GiB  148GiB  148GiB
> {noformat}
> it's probably because we have multiple {{Collection<InputChannelStateHandle>}}, and each of the individual handle returns the same value from {{AbstractChannelStateHandle#getStateSize}} - the full size of the spilled data, ignoring that only small portion of those data belong to a single input channel/result subpartition. In other words {{
> org.apache.flink.runtime.state.AbstractChannelStateHandle#getStateSize}} should be taking the offsets into account and return only the size of the data that belong exclusively to this handle.



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