I noticed that there are three versions of org.tukaani.xz floating around. The Photon stream has 1.6 but the Oxygen stream has 1.5 and Neon and older have 1.3. Perhaps you might try downloading Photon and Neon to see if they fail the same way. There is a source bundle for it, but given the stack trace in the reports you linked have no lines, perhaps it's not compiled with debug information. Looking at the source I see: public static StreamFlags decodeStreamHeader(byte[] buf)
throws IOException {
for (int i = 0; i < XZ.HEADER_MAGIC.length; ++i)
if (buf[i] != XZ.HEADER_MAGIC[i])
throw new XZFormatException();
where the HEADER_MAGIC is defined as /**
* XZ Header Magic Bytes begin a XZ file.
* This can be useful to detect XZ compressed data.
*/
public static final byte[] HEADER_MAGIC = {
(byte)0xFD, '7', 'z', 'X', 'Z', '\0' };
So you could have a look at ~/.eclipse/org.eclipse.oomph.p2/cache/http___download.eclipse.org_egit_updates_content.xml.xz to see if the file really has been downloaded with the incorrect initial bytes. And you might try downloading that file with the browser to see if the comes through the network correctly that way.