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

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

Piotr Nowojski created FLINK-17928:
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             Summary: 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
             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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