A new update is available for Base SAS , version 9.4_M2 :
The error \"Too many files are open\" is logged when you have clustered SAS® Metadata Servers
SAS® Metadata Server abnormally terminates with an \"unhandled Exception\" and the traceback indicates a failure in the KeepAliveThread
All servers stop responding in a load-balanced cluster
Note: A comprehensive list of all SAS hot fixes is available from support.sas.com. You can use the SAS Hot Fix Analysis, Download, and Deployment (SASHFADD) tool to manage your SAS hot fixes.