Funnelback patch 15.12.0.26
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Released: 2018-11-30 
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Applies to: v15.12.0 
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Internal reference: SUPPORT-2800 FUN-12115 FUN-12127 
Description
Push slaves will now actively pull down merge/vacuumed generations, rather than waiting for commits to trigger this. This can help solve problems where the slaves will not reduce the number of generations or re-indexes are not pulled down by the slaves.
Deployment
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(Windows) Stop currently running crawls. 
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Stop the Jetty web server and the Funnelback daemon. 
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Deploy the provided files on top of an existing install, backing up all replaced files. 
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Start the Jetty web server and the Funnelback daemon. 
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15.12.0.21 The conf/<collection>/custom_gather.groovyof each Facebook collection that are failing to update due to Facebook API changes should be updated to have the content provided inshare/custom_collection_templates/custom_gather.groovy.facebook. The customer will need to provide a never-expiring page access token to replace the app access token.
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(Windows) Start crawls as needed.