Including $processor.processPortlet in layout template causes StaleObjectStateException

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.5 CE GA6, 7.0.0 DXP SP8, 7.0.X, 7.1.0 CE GA1, 7.1.X, Master
• Fix Version/s: 7.0.0 DXP FP66, 7.0.X, 7.1.1 CE GA2, 7.1.10 DXP FP4, 7.1.10.1 SP1, 7.1.X, Master
• Component/s: Themes, Themes > Layout Template Plugins
• Labels:
  • ee-7.0.x-only
  • liferay-dxp-70-sp10
  • liferay-dxp-71-sp1
  • liferay-fixpack-de-66-7010
  • liferay-fixpack-dxp-4-7110
• Branch Version/s:
  7.1.x, 7.0.x
• Backported to Branch:
  Committed
• Story Points: 3
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/64595

Including $processor.processPortlet in layout template causes StaleObjectStateException

Steps to reproduce:

• write a layout template with this example code

#set ($customCSS = {"customCSSClassName": "portlet-static portlet-dropzone-disabled"})
 #set ($advancedData = {"advancedData": "$customCSS"})
 #set ($myHash = { "showPortletBreadcrumb": "true", "portletSetupCss" : "$advancedData"})
 
 $processor.processPortlet(
 "com_liferay_site_navigation_breadcrumb_web_portlet_SiteNavigationBreadcrumbPortlet", 
 $myHash
 )

• simulate multi user access (jmeter or browser F5) to page with this template
• the simulation causes attached stracktrace

I resolved replacing with this code in template

#set ($pref = "<portlet-preferences><preference><name>portletSetupCss</name><value>{advancedData={customCSSClassName=portlet-static portlet-dropzone-disabled}}</value></preference><preference><name>showPortletBreadcrumb</name><value>true</value></preference></portlet-preferences>")
 $theme.runtime("com_liferay_site_navigation_breadcrumb_web_portlet_SiteNavigationBreadcrumbPortlet", "", $pref)