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ASF GitHub Bot commented on SAMZA-1645: --------------------------------------- GitHub user xinyuiscool opened a pull request: https://github.com/apache/samza/pull/469 SAMZA-1645: A few issues found by BEAM stress test 1. Revert the priority set to intermediate streams. 2. Fix a watermark propagation condition You can merge this pull request into a Git repository by running: $ git pull https://github.com/xinyuiscool/samza SAMZA-1645 Alternatively you can review and apply these changes as the patch at: https://github.com/apache/samza/pull/469.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #469 ---- commit 54c2b4f01c85e40c83bb27d1d03aad22b3e680a3 Author: xinyuiscool <xiliu@...> Date: 2018-04-11T01:46:23Z SAMZA-1645: A few issues found by BEAM stress test ---- > A few issues found by BEAM stress test > -------------------------------------- > > Key: SAMZA-1645 > URL: https://issues.apache.org/jira/browse/SAMZA-1645 > Project: Samza > Issue Type: Bug > Reporter: Xinyu Liu > Assignee: Xinyu Liu > Priority: Major > > # Setting high priority on intermediate streams caused starvation on certain > tasks. Due to the intermediate message kept coming, the input streams are not > consumed and watermark messages are not generated, which makes downstream > accumulates large state and makes processing slower thus make starvation > worse. > # Watermark broadcast needs to check whether the watermark is advanced. -- This message was sent by Atlassian JIRA (v7.6.3#76005)