sampathboyapati - Were you able to find solution for this? I am also facing same issue.

We are noticing this issue in AEM 6.5.14 intermittently after code deployments. There are multiple projects(e.g. Project A, Project B which correspond to SiteA and Site B). Intermittently if Project A or Project B is deployed, immediately all site pages will start showing blank screen with similar e...

Did above suggestion to add lines in sling.properties resolve this issue?