I found a solution for this problem. The problem occurred if the server can not access to internet(to Google Analytics Server)
Here I can found the solution https://jira.duraspace.org/browse/DS-2718 Where DSpace is installed in a locked-down environment with minimal web access the call to google analytic blocks access to the bitstream and causes hundreds of pending connections. Solution: disabling the listener in applicationContext.xml works (comment out org.dspace.google.GoogleRecorderEventListener in WEB-INF/spring/applicationContext.xml) i -- You received this message because you are subscribed to the Google Groups "DSpace Technical Support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/dspace-tech. For more options, visit https://groups.google.com/d/optout.
