check that ulimit -n works, before running anything

software/zimbra/buildout.cfg

@@ -74,6 +74,7 @@ extends =
 
 
 parts =
+  check-ulimit
   slapos-cookbook
   directories
   jdk
@@ -114,6 +115,16 @@ develop =
 
 
 
+[check-ulimit]
+# /etc/security/limits.conf should contain something like:
+# *    hard     nofile    32768
+# *    soft     nofile    32768
+recipe = plone.recipe.command
+stop-on-error = true
+update-command = ${:command}
+command = ulimit -n 32768
+
+
 [jdk-download]
 # hack to download java and policy files, bypassing javascript requirement
 recipe = plone.recipe.command