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ConcurrentModificationException on read

See original GitHub issue

Reading an image in concurrent environment fails. I’m reading images in a threadpool with size up to 8 threads. The issue was observed on build from latest sources on master branch.

This particular error happened when reading a thumbnail, which I do when the size is greater than requested size, but I think it appears when reading the image itself as well.

java.util.ConcurrentModificationException: null
	at java.base/java.util.Vector$Itr.checkForComodification(Vector.java:1295) ~[na:na]
	at java.base/java.util.Vector$Itr.next(Vector.java:1251) ~[na:na]
	at java.desktop/sun.java2d.cmm.ProfileDeferralMgr.activateProfiles(ProfileDeferralMgr.java:93) ~[na:na]
	at java.desktop/java.awt.color.ICC_Profile.getInstance(ICC_Profile.java:788) ~[na:na]
	at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.setImageData(JPEGImageReader.java:771) ~[na:na]
	at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.readImageHeader(Native Method) ~[na:na]
	at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.readNativeHeader(JPEGImageReader.java:723) ~[na:na]
	at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.checkTablesOnly(JPEGImageReader.java:347) ~[na:na]
	at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.gotoImage(JPEGImageReader.java:493) ~[na:na]
	at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.readHeader(JPEGImageReader.java:716) ~[na:na]
	at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.readInternal(JPEGImageReader.java:1173) ~[na:na]
	at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.read(JPEGImageReader.java:1153) ~[na:na]
	at java.desktop/javax.imageio.ImageReader.read(ImageReader.java:938) ~[na:na]
	at com.twelvemonkeys.imageio.plugins.jpeg.ThumbnailReader.readJPEGThumbnail(ThumbnailReader.java:72) ~[imageio-jpeg-3.3.9.jar:3.3.9]
	at com.twelvemonkeys.imageio.plugins.jpeg.EXIFThumbnailReader.readJPEG(EXIFThumbnailReader.java:138) ~[imageio-jpeg-3.3.9.jar:3.3.9]
	at com.twelvemonkeys.imageio.plugins.jpeg.EXIFThumbnailReader.readJPEGCached(EXIFThumbnailReader.java:103) ~[imageio-jpeg-3.3.9.jar:3.3.9]
	at com.twelvemonkeys.imageio.plugins.jpeg.EXIFThumbnailReader.getWidth(EXIFThumbnailReader.java:221) ~[imageio-jpeg-3.3.9.jar:3.3.9]
	at com.twelvemonkeys.imageio.plugins.jpeg.JPEGImageReader.getThumbnailWidth(JPEGImageReader.java:1095) ~[imageio-jpeg-3.3.9.jar:3.3.9]````

Issue Analytics

State:
Created 6 years ago
Comments:12 (5 by maintainers)

Top GitHub Comments

3reactions

sghpjuikitcommented, Mar 26, 2018

I’m back. After period of use, I have seen no ConcurrentModificationException. It’s not 100%, but I consider the issue resolved and the solution satisfactory. I’m posting the entirety of the code that I’ve been using.

        // Load deferred color space profiles to avoid ConcurrentModificationException due to JDK
        // Use in public static main void or prior to application initialization
        // https://github.com/haraldk/TwelveMonkeys/issues/402
        // https://bugs.openjdk.java.net/browse/JDK-6986863
        // https://stackoverflow.com/questions/26297491/imageio-thread-safety
        ICC_Profile.getInstance(ColorSpace.CS_sRGB).getData();
        ICC_Profile.getInstance(ColorSpace.CS_PYCC).getData();
        ICC_Profile.getInstance(ColorSpace.CS_GRAY).getData();
        ICC_Profile.getInstance(ColorSpace.CS_CIEXYZ).getData();
        ICC_Profile.getInstance(ColorSpace.CS_LINEAR_RGB).getData();

Thx for the help.

3reactions

sghpjuikitcommented, Jan 24, 2018

Just an update, I still was not able to reproduce the issue, hence your workaround may have worked.

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