If a ContainerExecutionException is thrown during container launch under LCE information is added to the diagnostics for the container regarding the failure. The diagnostic's output includes the container id, exit code, "error output" and "shell output", with the expectation that the relevant exception details are in the "error output".
ContainerExecutionException has several constructors, with the most commonly used being the one that accepts a String. This form does not put the exception details into the "error output". This makes it difficult for the user to troubleshoot the failure.