After upgrade from 1.1 to 1.1.1, Confluence start to work, and frozen after 10 minutes without any response.
After 10 minutes more it starts to work again and I found following exceptions in Tomcat's log (I can give full exceptions if you need):

NOTE: I found that it recreated indexes, but why without my request and without any response ??

Jun 18, 2004 3:46:45 PM com.opensymphony.webwork.dispatcher.VelocityResult doExecute
SEVERE: Unable to render Velocity Template, '/admin/macros/macrolibraries.vm'
java.util.EmptyStackException
at java.util.Stack.peek(Stack.java:79)
at java.util.Stack.pop(Stack.java:61)
at com.atlassian.confluence.setup.velocity.ApplyDecoratorDirective$DirectiveStack.pop(ApplyDecoratorDirective.java:205)
at com.atlassian.confluence.setup.velocity.ApplyDecoratorDirective.render(ApplyDecoratorDirective.java:184)
at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:153)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:271)
at org.apache.velocity.Template.merge(Template.java:296)
at com.opensymphony.webwork.dispatcher.VelocityResult.doExecute(VelocityResult.java:94)
at bucket.util.profiling.ProfiledVelocityResult.doExecute(ProfiledVelocityResult.java:18)
....

Jun 18, 2004 3:46:45 PM com.opensymphony.webwork.dispatcher.ServletDispatcher serviceAction
SEVERE: Could not execute action
java.util.EmptyStackException
at java.util.Stack.peek(Stack.java:79)
at java.util.Stack.pop(Stack.java:61)
at com.atlassian.confluence.setup.velocity.ApplyDecoratorDirective$DirectiveStack.pop(ApplyDecoratorDirective.java:205)
at com.atlassian.confluence.setup.velocity.ApplyDecoratorDirective.render(ApplyDecoratorDirective.java:184)
at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:153)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:271)
at org.apache.velocity.Template.merge(Template.java:296)
at com.opensymphony.webwork.dispatcher.VelocityResult.doExecute(VelocityResult.java:94)
at bucket.util.profiling.ProfiledVelocityResult.doExecute(ProfiledVelocityResult.java:18)
at com.opensymphony.webwork.dispatcher.WebWorkResultSupport.execute(WebWorkResultSupport.java:115)
....