Occasional JavaScript error thrown: 'Uncaught Executor error time: NaN'

[kpturner]

 'Attr.ownerElement' is deprecated and has been removed from DOM4 (http://w3.org/tr/dom).
:9081/js/jquery/jquery.min.js?v=y097eeydkk6xyldi1420029582638:3 'Attr.textContent' is deprecated. Please use 'value' instead.
:9081/js/jquery/jquery.min.js?v=y097eeydkk6xyldi1420029582638:3 'Attr.nodeValue' is deprecated. Please use 'value' instead.
:9081/js/lightstreamer/lightstreamer.js?v=6.02a.7946:178 WebSocket connection to 'ws://ctsdmz:8686/lightstreamer' failed: WebSocket is closed before the connection is established.
http://ctsdmz:8686/lightstreamer/create_session.js Failed to load resource: net::ERR_NAME_NOT_RESOLVED
http://ctsdmz:8686/lightstreamer/control.js Failed to load resource: net::ERR_NAME_NOT_RESOLVED
3http://ctsdmz:8686/lightstreamer/create_session.js Failed to load resource: net::ERR_NAME_NOT_RESOLVED
http://ctsdmz:8686/lightstreamer/create_session.js?LS_phase=8529&LS_cause=t…NS&LS_user=KTURNER&LS_password=nullpassword&LS_force_head=true&LS_eng=866& Failed to load resource: net::ERR_NETWORK_CHANGED
http://ctsdmz:8686/lightstreamer/create_session.js Failed to load resource: net::ERR_NETWORK_CHANGED
http://ctsdmz:8686/lightstreamer/create_session.js?LS_phase=8533&LS_cause=t…NS&LS_user=KTURNER&LS_password=nullpassword&LS_force_head=true&LS_eng=866& Failed to load resource: net::ERR_NETWORK_CHANGED
http://ctsdmz:8686/lightstreamer/create_session.js Failed to load resource: net::ERR_NAME_NOT_RESOLVED
3http://ctsdmz:8686/lightstreamer/create_session.js Failed to load resource: net::ERR_CONNECTION_TIMED_OUT
http://ctsdmz:8686/lightstreamer/create_session.js?LS_phase=8565&LS_cause=t…NS&LS_user=KTURNER&LS_password=nullpassword&LS_force_head=true&LS_eng=866& Failed to load resource: net::ERR_CONNECTION_TIMED_OUT
http://ctsdmz:8686/lightstreamer/create_session.js Failed to load resource: net::ERR_CONNECTION_TIMED_OUT
http://ctsdmz:8686/lightstreamer/create_session.js?LS_phase=8571&LS_cause=t…NS&LS_user=KTURNER&LS_password=nullpassword&LS_force_head=true&LS_eng=866& Failed to load resource: net::ERR_CONNECTION_TIMED_OUT
http://ctsdmz:8686/lightstreamer/create_session.js Failed to load resource: net::ERR_CONNECTION_TIMED_OUT
http://ctsdmz:8686/lightstreamer/create_session.js?LS_phase=8575&LS_cause=t…NS&LS_user=KTURNER&LS_password=nullpassword&LS_force_head=true&LS_eng=866& Failed to load resource: net::ERR_CONNECTION_TIMED_OUT
http://ctsdmz:8686/lightstreamer/create_session.js Failed to load resource: net::ERR_NETWORK_CHANGED
http://ctsdmz:8686/lightstreamer/create_session.js?LS_phase=8581&LS_cause=t…NS&LS_user=KTURNER&LS_password=nullpassword&LS_force_head=true&LS_eng=866& Failed to load resource: net::ERR_NETWORK_CHANGED
:9081/js/lightstreamer/lightstreamer.js?v=6.02a.7946:48 console.trace():9081/js/lightstreamer/lightstreamer.js?v=6.02a.7946:48 x.addPackedTimedTask
:9081/js/lightstreamer/lightstreamer.js?v=6.02a.7946:49 Uncaught Executor error for times: 1420191599170 + null

[Mone]

The line number is not relevant because it simply points to the place where the exception is thrown, but that's not where the problem lies as the null->NaN value is coming in as a parameter to that method.
The stack trace would actually show the bad call, I'm trying to imagine why is missing.

In the library there are many calls to (a method that calls) that method, that's why pinpointing the case with static analysis of the code is not easy. Unfortunately it looks like at this point is the only path left.

Just to try and reduce the code to be analyzed, does your application use our visual widgets?