Unable to configure multiple instance of elastic server on linux. The Tableau Server logs may contain an error similar to the following:
 bootstrap checks failed
: max virtual memory areas vm.max_map_count  is too low, increase to at least 
After configuring multiple instance of elastic server, the following issues may occur.
- Users cannot select which site to sign-in when there are multi-sites.
- No left navigation pane to change a site or remove a site even though sign into a site.
- Unable to use 'My Account Settings'.
Additionally, Vizportal logs may contain an error similar to the following:
Exception raised by call target: Collection not found: site
org.apache.solr.common.SolrException: Collection not found: site