Orbit file download seems not retried

EmileSonneveld · May 7, 2026, 3:24pm

Upon running a SNAP graph, we get errors like this:

WARNING: eu.esa.sar.orbits.io.sentinel1.OrbitFileScraper: Unable to connect to http://step.esa.int/auxdata/orbits/Sentinel-1/POEORB/S1A/2018/01/: Read timed out

Trying again later solved the issue.
When digging in the code, it looks like there is no retry in the getRemoteHttpFile method.

github.com/senbox-org/snap-engine

snap-engine-utilities/src/main/java/org/esa/snap/engine_utilities/download/DownloadableContentImpl.java

51cb9cbac


      
              }
          }
          
          public static File getRemoteHttpFile(final URL remoteURL, final File localZipFile) throws IOException {
              final String remotePath = remoteURL.toString() + localZipFile.getName();
              SystemUtils.LOG.info("http retrieving " + remotePath);
          
              final AtomicReference<File> returnValue = new AtomicReference<>();
              Runnable operation = () -> {
                  try {
                      returnValue.set(downloadFile(new URL(remotePath), localZipFile));
                  } catch (IOException e) {
                      SystemUtils.LOG.log(Level.SEVERE, "Failed to download remote file.", e);
                  }
              };
              operation.run();
          
              return returnValue.get();
          }
          
          /**

Would it make sense to add it there? With exponential backoff for example. As a temporary workaround we could automatically re-launch the GPT call, but that would waste a lot of compute.

We run on snap version 12.
(Internal ticket)

Greetings,
Emile Sonneveld

diana_harosa · May 11, 2026, 8:36am

Jira ticket SNAP-4202 created.