[ https://issues.apache.org/jira/browse/BEAM-343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15332083#comment-15332083 ]
ASF GitHub Bot commented on BEAM-343:
-------------------------------------
GitHub user swegner opened a pull request:
https://github.com/apache/incubator-beam/pull/469
[BEAM-343] Fix NullPointerException in AfterWatermark display data
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---
Window transforms register display data for the associated trigger
function by calling its .toString() method. The AfterWatermark
trigger .toString() method was not properly handling cases where
there is no late firings registered.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/swegner/incubator-beam afterwatermark-displaydata
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-beam/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 28c47c8e48e78b7bc23ae96661a1ee25fd3b4599
Author: Scott Wegner <sw...@google.com>
Date: 2016-06-15T16:51:59Z
Fix NullPointerException in AfterWatermark display data
Window transforms register display data for the associated trigger
function by calling its .toString() method. The AfterWatermark
trigger .toString() method was not properly handling cases where
there is no late firings registered.
----
> DisplayData error in AfterWatermark
> -----------------------------------
>
> Key: BEAM-343
> URL: https://issues.apache.org/jira/browse/BEAM-343
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-core
> Affects Versions: 0.1.0-incubating, 0.2.0-incubating
> Reporter: Daniel Mills
> Assignee: Scott Wegner
>
> If AfterWatermark is used with early firings but no late firings, toString (used by DisplayData) crashes because there is no trigger at LATE_INDEX.
> https://github.com/apache/incubator-beam/blob/master/sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/windowing/AfterWatermark.java#L239
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