Lucence indexes are not in sync on CM and CD server which seems expected as per this post but for me even manual trigger is not working. I tried Index rebuild in Developer tab from top ribbon from Content Editor as well Control Panel. CM index updates are happening but not on CD server. I tried ScalabilitySetting changes as mentioned in this post but didn't help. In my case indexes are updated on CD server only if I republish any items.
I have below settings on CM & CD
<index id="mycustomindex_index" type="Sitecore.ContentSearch.LuceneProvider.SwitchOnRebuildLuceneIndex, Sitecore.ContentSearch.LuceneProvider">
Strategy
<strategies hint="list:AddStrategy">
<strategy ref="contentSearch/indexConfigurations/indexUpdateStrategies/onPublishEndAsync" />
<strategy ref="contentSearch/indexConfigurations/indexUpdateStrategies/remoteRebuild" />
</strategies>
EnableEventQueues is true on CM and CD servers. What else can I try for manual Rebuild index trigger to work?
Sitecore version : 8.2