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https://issues.apache.org/jira/browse/GIRAPH-962?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Martin Junghanns updated GIRAPH-962:
------------------------------------
Attachment: GIRAPH-962.patch
Modified the condition as stated in the issue documentation. Tested with my own
algorithms and with RandomWalkWithRestartComputationTest.
> TextAggregatorWriter with frequency AT_THE_END writes in every superstep
> ------------------------------------------------------------------------
>
> Key: GIRAPH-962
> URL: https://issues.apache.org/jira/browse/GIRAPH-962
> Project: Giraph
> Issue Type: Bug
> Components: bsp
> Affects Versions: 1.1.0
> Reporter: Martin Junghanns
> Priority: Minor
> Labels: aggregator, patch
> Fix For: 1.1.0
>
> Attachments: GIRAPH-962.patch
>
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> TextAggregatorWriter is used to write the content of all aggregators in a
> superstep to a text file. It offers three predefined frequencies:
> {{NEVER (0)}}
> {{ALWAYS (1) // in each superstep}}
> {{AT_THE_END (-1) // only in the last superstep}}
> The aggregators are written in a superstep if the following condition
> evaluates to true:
> {{(frequeny == AT_THE_END && superstep == LAST_SUPERSTEP) || (frequency !=
> NEVER && superstep % frequency == 0)}}
> The problem is, that {{LAST_SUPERSTEP}} is represented by {{-1}} and {{x % -1
> = 0}} for all {{x}}. This leads to the case, that if {{frequency =
> AT_THE_END}}, the content is written in every superstep.
> On way to solve this is to extend the second part of the OR-clause to
> {{(frequency != NEVER && frequency != AT_THE_END && superstep % frequency ==
> 0)}}
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