Files - FileStore. Too many open files - alfrescowiki. When you are running Alfresco in a UNIX environment you may be hit by the "Too many open files" error.
Symptoms that you may be affected is that when running the Share client some pages start displaying blank pages, or your dashlets fail to load. The issue manifests itself on *NIX systems where often the system is configured by default to allow users a maximum of only 1024 open file handles (eg. Ubuntu) which is often not sufficient for the alfresco.war and share.war applications. The error is easily fixed by configuration changes in the operating system.
Verifying if you are affected. Nightly Alfresco. Download and Install Alfresco - AlfrescoWiki.