Unable to access NetScaler SDX SVM through GUI however SSH and ping to the SVM works.

The following logs are recorded in the/var/log/messages file:
messages:Sep 17 15:54:30 <kern.crit> KFHSDX-2 kernel: swap_pager: out of swap space
messages:Sep 17 15:55:40 <kern.crit> KFHSDX-2 kernel: swap_pager_getswapspace(16): failed
messages.0:Jul 15 08:13:02 <kern.crit> KFHSDX-2 kernel: swap_pager_getswapspace(16): failed

This is a known memory leak issue which causes the swap space exhaustion; this in turn results in killing the SVM process. To resolve this issue upgrade to NetScaler 10.5-59.11 or later.

Workaround

To workaround this issue restart the svmd process:

1. Access the SVM through PuTTY.

2. Change directory using the following command:
   cd /etc/rc.d/

3. Type the following command to restart the svmd process:
   svmd restart