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https://issues.apache.org/jira/browse/FLINK-13478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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zhijiang updated FLINK-13478:
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Description:
We have two basic release strategies atm. One is based on consumption via
network notification from consumer. The other is based on notification via RPC
from JM/scheduler.
But in current implementation of {{BoundedBlockingSubpartition}}, these two
ways are a bit coupled with each other. If the JM decides to release partition
and send the release RPC call, it has to wait all the reader views really
released before finally closing the data file. So the JM-RPC-based release
strategy still relies on the consumption confirmation via network to some
extent.
In order to make these two release strategies independent, if the release call
is from JM/scheduler RPC, we could immediately release all the view readers and
then close the data file as well. If the release is based on consumption
notification, after all the view readers for one subpartition are released, the
subpartition could further notify the parent {{ResultPartition}} which decides
whether to release the whole partition or not.
was:
We have two basic release strategies atm. One is based on consumption via
network notification from consumer. The other is based on notification via RPC
from JM/scheduler.
But in current implementation of {{BoundedBlockingSubpartition}}, these two
ways are coupled with each other. In detail, the network consumption
notification could only close data file after the release RPC was triggered
from JM/scheduler. Also for the release RPC it has to wait all the reader views
really released before closing the data file. So the release RPC still relies
on network notification to some extent.
In order to make these two release strategies independent, if the release call
is from JM/scheduler RPC, we could immediately release all the view readers and
then close the data file as well. If the release is based on consumption
notification, after all the view readers for one subpartition are released, the
subpartition could further notify the parent {{ResultPartition}} which decides
whether to release the whole partition or not.
> Decouple two different release strategies in BoundedBlockingSubpartition
> ------------------------------------------------------------------------
>
> Key: FLINK-13478
> URL: https://issues.apache.org/jira/browse/FLINK-13478
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Coordination, Runtime / Network
> Reporter: zhijiang
> Assignee: zhijiang
> Priority: Minor
>
> We have two basic release strategies atm. One is based on consumption via
> network notification from consumer. The other is based on notification via
> RPC from JM/scheduler.
> But in current implementation of {{BoundedBlockingSubpartition}}, these two
> ways are a bit coupled with each other. If the JM decides to release
> partition and send the release RPC call, it has to wait all the reader views
> really released before finally closing the data file. So the JM-RPC-based
> release strategy still relies on the consumption confirmation via network to
> some extent.
> In order to make these two release strategies independent, if the release
> call is from JM/scheduler RPC, we could immediately release all the view
> readers and then close the data file as well. If the release is based on
> consumption notification, after all the view readers for one subpartition are
> released, the subpartition could further notify the parent
> {{ResultPartition}} which decides whether to release the whole partition or
> not.
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