GitHub user ramkrish86 opened a pull request:

    FLINK-3322 Allow drivers and iterators to reuse the memory segments

    Thanks for contributing to Apache Flink. Before you open your pull request, 
please take the following check list into consideration.
    If your changes take all of the items into account, feel free to open your 
pull request. For more information and/or questions please refer to the [How To 
Contribute guide](
    In addition to going through the list, please provide a meaningful 
description of your changes.
    - [ ] General
      - The pull request references the related JIRA issue ("[FLINK-XXX] Jira 
title text")
      - The pull request addresses only one issue
      - Each commit in the PR has a meaningful commit message (including the 
JIRA id)
    - [ ] Documentation
      - Documentation has been added for new functionality
      - Old documentation affected by the pull request has been updated
      - JavaDoc for public methods has been added
    - [ ] Tests & Build
      - Functionality added by the pull request is covered by tests
      - `mvn clean verify` has been executed successfully locally or a Travis 
build has passed
    Updated PR based on @ggevay 's feedback. Now the drivers are all made of 
type ResettableDrivers and we use the existing APIs to reuse the driver and the 
iterators. The JoinTaskITerator has now a new method called reset() that allows 
to reset the iterator's state.
    If we go with the approach then it makes sense to remove the 
ResettableDriver and add all the API in it to the Driver interface itself. That 
is for a later PR. 
    @ggevay - Pls review and give your valuable feedback.
    I tried mvn clean verify and got the tests to pass in flink-runtime and 
flink-gelly-examples. One failed 
and when I ran locally it passed again. 

You can merge this pull request into a Git repository by running:

    $ git pull FLINK-4615_new

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #2510
commit e17462881cc2f0137cc8412eb578fb4c42baeb15
Author: Ramkrishna <>
Date:   2016-09-19T10:27:28Z

    FLINK-3322 Allow drivers and iterators to reuse the memory segments


If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at or file a JIRA ticket
with INFRA.

Reply via email to