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https://issues.apache.org/jira/browse/PIO-25?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15431258#comment-15431258
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Pat Ferrel commented on PIO-25:
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A pull request or patch is welcome.
> Don't attempt to start PostgreSQL when it's not being used
> ----------------------------------------------------------
>
> Key: PIO-25
> URL: https://issues.apache.org/jira/browse/PIO-25
> Project: PredictionIO
> Issue Type: Improvement
> Reporter: David Jones
> Priority: Trivial
>
> When running: {{pio-start-all}}, even if your {{pio-env.sh}} file is setup to
> use HBase and not PostgreSQL you'll see "postgresql: unrecognised service":
> {quote}
> Starting Elasticsearch...
> Starting HBase...
> starting master, logging to
> /PredictionIO/vendors/hbase-1.2.2/bin/../logs/hbase--master-2898ebbfb9d1.out
> postgresql: unrecognized service
> Waiting 10 seconds for HBase to fully initialize...
> Starting PredictionIO Event Server...
> {quote}
> This is because {{pio-start-all}} simply tries to detect if PostgreSQL is
> running, if it isn't, then it will go ahead and try to start it:
> https://github.com/apache/incubator-predictionio/blob/develop/bin/pio-start-all#L64
> What would be better is if we checked
> {{PIO_STORAGE_REPOSITORIES_METADATA_SOURCE}},
> {{PIO_STORAGE_REPOSITORIES_EVENTDATA_SOURCE}} and
> {{PIO_STORAGE_REPOSITORIES_MODELDATA_SOURCE}} to see if any of those have
> been set to {{PGSQL}}. If they have not been set to {{PGSQL}} then we don't
> need to attempt to start PostgreSQL every time.
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