yes, I see that the proxy issue is something different, but wanted to raise in here as well that there are general problems at the moment and we are working on an update to solve it.
yes we are also encountering this issue. Actually, we would need snappy to be configured via standard HTTP_PROXY env vars but it does not use it. Looking forward a solution too.
I tried to set both
JAVA_OPTS: "-Dhttp.proxyHost=proxy_host -Dhttp.proxyPort=proxy_port"
INSTALL4J_ADD_VM_PARAMS: "-Dhttp.proxyHost=proxy_host -Dhttp.proxyPort=proxy_port"
no luck. the processing stays blocked at
INFO: org.esa.snap.core.dataop.dem.ElevationFile: http retrieving http://step.esa.int/auxdata/dem/SRTMGL1/S26E031.SRTMGL1.hgt.zip
INFO: org.esa.snap.engine_utilities.download.DownloadableContentImpl: http retrieving http://step.esa.int/auxdata/dem/egm96/ww15mgh_b.zip
INFO: org.esa.snap.core.dataop.dem.ElevationFile: http retrieving http://step.esa.int/auxdata/dem/SRTMGL1/S27E031.SRTMGL1.hgt.zip
This is maybe the solution : No response to regular proxy configuration mechanisms of Java