RStudio server hangs after user loging in

The RStudio Server - open edition stopped working for us recently.

After user successfully logs in, the browser hangs at the GET request for F69BB2B91FE23BD0F57475FF8AE2508C.cache.js file.

There is no response from server, and the file is available in the /usr/lib/rstudio-server/www/rstudio/ with the same privileges as other scripts in the directory. There is nothing in the /var/log/messages

Recently we have remover/updated Java on the server (RHEL 6). can this be related?

What I have tried so far is:

Restart Rstudio server
Upgrade Rstudio server to latest version
Remove .Rprofile and .Renviron, .Rhistory /.rstudio from users home directories
Remove rstudio-rsession from /tmp directory
Run sudo R CMD javareconf
Inserted this line into /etc/rserver.conf : LD_LIBRARY_PATH=/usr/lib64/microsoft-r/3.3/lib64/R/lib:/builddir/vendor/build/lib:/usr/lib/jvm/java-1.8.0-openjdk-

Any ideas what might have happened?

Turned out to be a network issue.

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