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https://issues.apache.org/jira/browse/FLINK-2253?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Till Rohrmann reassigned FLINK-2253:
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Assignee: (was: Till Rohrmann)
> ALS fails if the data flow is split up and the input is non-deterministic
> -------------------------------------------------------------------------
>
> Key: FLINK-2253
> URL: https://issues.apache.org/jira/browse/FLINK-2253
> Project: Flink
> Issue Type: Bug
> Components: Machine Learning Library
> Reporter: Till Rohrmann
> Labels: ML
>
> If the {{temporaryPath}} of Flink's {{ALS}} implementation is set, then the
> ALS job is executed one part after the other. This also includes the routing
> information calculation for the user and item blocks. If the input
> {{DataSet}} is calculated non-deterministically, e.g. if it's the result of a
> {{first}} operation, then the resulting routing information won't be
> consistent and ALS fails.
> A solution would be to pin the input {{DataSet}} so that it will only be
> executed once. Until we have this functionality, I propose to simply execute
> the user and item routing information at the same time.
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