Issue with yum update while doing Redhat upgrade from 5.2 to 5.6
# yum update
Loading "rhnplugin" plugin
Loading "security" plugin
Skipping security plugin, no data
Setting up Update Process
Resolving Dependencies
Skipping security plugin, no data
--> Running transaction check
---> Package stunnel.i386 0:4.15-2.el5.1 set to be updated -----> It hangs here and there is no further progress after this stage
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