Sentinel-1b image view Java heap space error on Mac

snap Problem Reports
#1

Hi there,

I am very much a newbie to SNAP so bare with me. I understand a lot of people ask questions like these but all the terminology in this forum sounds like another language to me lol. I have downloaded an image from scihub it is a sentinel-1b image. I use a macbook air 2013. I am getting a java heap space error repeatedly. I have already done a number of tutorials from the course “echoes in space” and I can usually download and view images on SNAP and not run into many problems. I can’t seem to be able to even just view this image. It will download to SNAP, just when I click on a polarization band to view the image is when I get the error. I will paste the error below. My memory is 4gb. Is there anything I can do to change some settings around and avoid this problem. Remember you’re dealing with a real beginner. Thank you.

java.lang.OutOfMemoryError: Java heap space
Caused: java.util.concurrent.ExecutionException
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:192)
at javax.swing.SwingWorker.get(SwingWorker.java:602)
[catch] at org.esa.snap.rcp.actions.window.OpenImageViewAction$1.done(OpenImageViewAction.java:221)
at javax.swing.SwingWorker$5.run(SwingWorker.java:737)
at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.run(SwingWorker.java:832)
at sun.swing.AccumulativeRunnable.run(AccumulativeRunnable.java:112)
at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.actionPerformed(SwingWorker.java:842)
at javax.swing.Timer.fireActionPerformed(Timer.java:313)
at javax.swing.Timer$DoPostEvent.run(Timer.java:245)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

#2

4 GB is probably not sufficient, but as it has worked before, maybe just the memory was full.
Please try to close SNAP and open the same image again.

#3

Thank you for your response! I tried this but it did not work. Is there something I can do to allocate more of my memory to SNAP? There are probably things that are unnecessarily using memory. I have deleted a number of things to try and fix the issue but doesn’t seem to be working. Could I download a different image from the same area that might use less memory? It just has to be a sentinel-1 image of the area of our field site. It seems weird that today is the day that SNAP just decided to not let me open any images because I did try and do another tutorial from echoes in space today and had the same issue.

#4

I have no explanation for the fact that you can open some images and others cause the error. Are all of them GRD images with dual-polarization?

Maybe these preliminary FAQs help you:

#5

I have opened up multiple images through out the echoes in space course. However I just went back and opened one from a past tutorial and yes it was a GRD image with a dual polarization and it opened fine. I understand theres no explanation for which images I can open I am more asking if anyone has seen this error before and what my options would be since I have to run a land classification of this image. Can I download a different sentinel-1 image from the same area that might have less GB? Can I buy an external hard drive and hook it up to my macbook and run off that? Can I change some settings in SNAP to overcome this?

#6

where did you store this data? External hard drives are not recommended, because the reading/writing is slower than from the local drive.

You can try to find an image with single polarization, which would have a smaller file size, but the size of an image would be the same.