CEF Forum

Today all of a sudden on my company's network our existing application using JCEF consumes all memory and crashes the application.

This happens only on our company network, not on my home internet connection or elsewhere. cef.log is empty and I have no clue why this is happening ?

Does this look familiar to anyone ? could JCEF/chromium possibly be hacked ?

What changed recently in your JCEF usage? Did you update the version, change the content loaded, etc?

Nothing changed in our setup, it is as if something in our corporate network environment changed, and suddenly this starts happening...
It happens as CEF client is loaded, even before any web page is loaded.

Some change in DNS config or network proxy?

It must be something in our network, but how can such changes make JCEF explode ? I am trying to update our JCEF version to see if that makes the problem go away...

Impossible to say without knowing the cause.

I have put the logging into verbose mode, then startup the application without loading any URL, maybe something in this log that can provide a clue ?

[1008/162740.909:VERBOSE1:pref_proxy_config_tracker_impl.cc(186)] 00000186DAC0B9C0: set chrome proxy config service to 00000186D78996A0
[1008/162740.924:VERBOSE1:webrtc_internals.cc(118)] Could not get the download directory.
[1008/162741.431:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: http://wpad/wpad.dat
[1008/162741.435:VERBOSE1:pac_file_fetcher_impl.cc(301)] Fetched PAC script does not have a proper mime type:
[1008/162741.555:VERBOSE1:proxy_resolver_v8_tracing.cc(930)] PAC-error: line: 14: Uncaught SyntaxError: Unexpected identifier
[1008/162741.556:VERBOSE1:configured_proxy_resolution_service.cc(1139)] Failed configuring with PAC script, falling-back to manual proxy servers.
[1008/162749.559:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: http://wpad/wpad.dat
[1008/162749.561:VERBOSE1:pac_file_fetcher_impl.cc(301)] Fetched PAC script does not have a proper mime type:
[1008/162853.366:VERBOSE1:statistics_recorder.cc(430)] Collections of all histograms
Histogram: ChildProcess.FieldTrials.CreateFromShmemSuccess recorded 1 samples, mean = 1.0 (flags = 0x1)
0 O (0 = 0.0%)
1 ------------------------------------------------------------------------O (1 = 100.0%) {0.0%}
2 O (0 = 0.0%) {100.0%}

Histogram: SharedMemory.MapBlockedForSecurity recorded 1 samples, mean = 0.0 (flags = 0x1)
0 ------------------------------------------------------------------------O (1 = 100.0%)
1 ...

Histogram: ThreadPool.HeartbeatLatencyMicroseconds.ContentChild.BackgroundTaskPriority recorded 0 samples (flags = 0x1)
0 ...

Histogram: ThreadPool.HeartbeatLatencyMicroseconds.ContentChild.UserBlockingTaskPriority recorded 0 samples (flags = 0x1)
0 ...

Histogram: ThreadPool.HeartbeatLatencyMicroseconds.ContentChild.UserVisibleTaskPriority recorded 0 samples (flags = 0x1)
0 ...

Histogram: ThreadPool.NumTasksBeforeDetach.ContentChild.Background recorded 0 samples (flags = 0x1)
0 ...

Histogram: ThreadPool.NumTasksBeforeDetach.ContentChild.Foreground recorded 1 samples, mean = 0.0 (flags = 0x1)
0 ------------------------------------------------------------------------O (1 = 100.0%)
1 ...

Histogram: V8.Initializer.LoadV8Snapshot.Result recorded 1 samples, mean = 0.0 (flags = 0x1)
0 ------------------------------------------------------------------------O (1 = 100.0%)
1 ...

Histogram: V8.Initializer.OpenV8File.Result recorded 1 samples, mean = 0.0 (flags = 0x1)
0 ------------------------------------------------------------------------O (1 = 100.0%)
1 ...

My collegue just points out to me it may be related to this: viewtopic.php?f=6&t=17247

Someone posted an invalid WPAD config in our network, brilliant !!!

Thanks for your support, have a nice weekend !