When running an app on yosemity from the console it sometimes prints the following warnings:

 java[38348:1602231] TSplicedFont failed creating descriptor for:
(
        {
        UnicodeCharSetTrim = "<__NSCFCharacterSet: 0x7ffcfe87e7a0>";
        name = ".STHeitiUISC-Thin";
    }
)
2014-07-03 11:05:29.527 java[38348:1602231] TSplicedFont failed creating descriptor for:
(
        {
        UnicodeCharSetTrim = "<__NSCFCharacterSet: 0x7ffcfe87e7a0>";
        name = ".STHeitiUISC-Thin";
    }
)
2014-07-03 11:05:29.527 java[38348:1602231] TSplicedFont failed creating descriptor for:
(
        {
        UnicodeCharSetTrim = "<__NSCFCharacterSet: 0x7ffcfe87e7a0>";
        name = ".STHeitiUITC-Thin";
    }
)
2014-07-03 11:05:29.527 java[38348:1602231] TSplicedFont failed creating descriptor for:
(
        {
        UnicodeCharSetTrim = "<__NSCFCharacterSet: 0x7ffcfe87e7a0>";
        name = ".STHeitiUITC-Thin";
    }
)
2014-07-03 11:05:29.528 java[38348:1602231] TSplicedFont failed creating descriptor for:
(
        {
        NSCTFontFeatureSettingsAttribute = (
                        {
                CTFeatureSelectorIdentifier = 8;
                CTFeatureTypeIdentifier = 22;
            }
        );
        UnicodeCharSetTrim = "<__NSCFCharacterSet: 0x7ffcfe8809b0>";
        name = ".HiraKakuInterface-W2";
    }
)
2014-07-03 11:05:29.528 java[38348:1602231] TSplicedFont failed creating descriptor for:
(
        {
        NSCTFontFeatureSettingsAttribute = (
                        {
                CTFeatureSelectorIdentifier = 8;
                CTFeatureTypeIdentifier = 22;
            }
        );
        UnicodeCharSetTrim = "<__NSCFCharacterSet: 0x7ffcfe8809b0>";
        name = ".HiraKakuInterface-W2";
    }
)

Well reproduced when opening the screen menu bar.