Administrators Guide (Supporting Fabric OS v7.3.0) Manual

Web Tools limitations (Continued)TABLE 24
Area Details
Java Plug-in If you have a Web Tools session open and you open a second session using the File > New
browser menu, this results in unexpected behavior of the original Web Tools session. For
example, you cannot change Admin Domains in the second session.
Web Tools supports only one browser instance per JRE, and when you open another window
using the File > New menu, the two windows share the same JRE environment.
Workaround: Open two independent browser sessions.
Loss of
Connection
Occasionally, you might see the following message when you try to retrieve data from the
switch or send a request to the switch:
Switch Status Checking
The switch is not currently accessible.
The dialog box title may vary, because it indicates which module is having the problem.
This is caused by the loss of HTTP connection with the switch, due to a variety of possible
problems. Web Tools automatically tries to regain the connection. While Web Tools is trying to
regain the connection, check if your Ethernet connection is still functioning. If the problem is not
with the Ethernet connection, wait for Web Tools to recover the connection and display the
following message:
"You will have to resubmit your request after closing this message."
If the temporary switch connection loss is caused by a switch hot code load or other similar
operation, the Switch Explorer you are currently running can be downloaded from a different
firmware version than the new one. In this case, the following message displays:
"Switch connection is restored. The firmware version you are running is not in sync with the
version currently on switch. Close your browser and re-launch Web Tools."
You need to close Switch Explorer and relaunch Web Tools to reopen the connection.
Launching Web Tools takes around 5 minutes when the machine where client is running does
not have access to internet. This is due to the certificate revocation check for the web start
applications.
Workaround: Go to Java Control Panel > Advanced > and select Do no check (not
recommended) under Perform certificate revocation checks on to skip certificate revocation
check for web start applications.
Non-FIPS secure
mode HTTPS
HTTPS supports only TLSv1 and SSLv3 protocols with !DH:HIGH:-MD5 cipher in non-FIPS
mode. These options must be enabled in your Internet browser.
Out of Memory
Errors
If you are managing fabrics with more than ten switches or more than 1000 ports, or if you are
using the iSCSI Gateway module extensively, you might encounter out-of-memory errors such
as the following:
java.lang.OutOfMemoryError: Java heap space
To avoid this problem, increase the default heap size in the Java Control Panel. Refer to Java
Plug-in configuration on page 27 for instructions.
Performance
Monitor
If the web browser crashes or the Performance Monitor license is lost while the Performance
Monitoring window is running, some of the Performance Monitor resources owned by Web
Tools might not be cleaned up correctly.
Workaround: You might need to use the CLI to manually delete these counters. For example,
if you detect Web Tools owned resources (using perfshoweemonitor), but you have verified
that no Web users are actually using them, use the perfdeleemonitor or perfcleareemonitor
command to free the resources.
Limitations
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