What does an ERROR in the web_service.log about an uncaught exception..component returned failure code..NS_ERROR_NOT_AVAILABLE mean?

[Ellen]

While reviewing the various Splunk logs for an issue with SplunkWeb performance in 4.1.x, I noticed the following error several times in the $SPLUNK_HOME/var/log/splunk/web_service.log below. What does this error mean and what should I investigate?

2010-10-20 08:07:43,156 ERROR          [4cbf0507ddccd0990] utility:59 - name=javascript, class=Splunk.Error, lineNumber=0, message=uncaught exception: [Exception... "Component returned failure code: 0x80040111 (NS_ERROR_NOT_AVAILABLE) [nsIXMLHttpRequest.status]"  nsresult: "0x80040111 (NS_ERROR_NOT_AVAILABLE)"  location: "JS frame :: https://splunk1-prod.abcde.com:8000/en-US/static/@85165/js/splunk.jquery.csrf_protection.js :: anonymous :: line 56"  data: no], fileName="

[Ellen]

Even though this is flagged as an ERROR, this is almost always a benign message.

It often occurs when users switch between pages and during that transition it can often leave the runtime in an awkward state that can trigger this error.

This can be ignored and in the future the message type will be reduced from an ERROR status so as not to cause undue concern.