public PollingResult call() throws IOException {
                final Map<String,Long> revs = new HashMap<String,Long>();
                boolean changes = false;
                boolean significantChanges = false;

                for (Map.Entry<String,Long> baselineInfo : baseline.revisions.entrySet()) {
                    String url = baselineInfo.getKey();
                    long baseRev = baselineInfo.getValue();

                    try {
                        final SVNURL svnurl = SVNURL.parseURIDecoded(url);
                        long nowRev = new SvnInfo(parseSvnInfo(svnurl,authProvider)).revision;

                        changes |= (nowRev>baseRev);

                        listener.getLogger().println(Messages.SubversionSCM_pollChanges_remoteRevisionAt(url, nowRev));
                        revs.put(url, nowRev);
                        // make sure there's a change and it isn't excluded
                        if (logHandler.findNonExcludedChanges(svnurl,
                                baseRev+1, nowRev, authProvider)) {
                            listener.getLogger().println(Messages.SubversionSCM_pollChanges_changedFrom(baseRev));
                            significantChanges = true;
                        }
                    } catch (SVNException e) {
						// DEFECT FIX:  This is a fix to address the issue of when the svn repository is unavailable.
						//              The bug happens due to the SubversionSCM logic thinking a build is needed when
						//              really we do not have any information from remote SVN repository to determine this.
						// Author:  Jeffrey Lutz bulkmail@lutz.ws
                        // If SVNException was caused by connection failure to subversion, then make sure to make
                        // "current" SVNRevisionState is like "baseline" SVNRevisionState with regards to revisions
                        //
                        if(e.getCause() instanceof java.net.ConnectException) {
                            revs.put(url, baseRev);
                        }
                        e.printStackTrace(listener.error(Messages.SubversionSCM_pollChanges_exception(url)));
                    }
                }

                assert revs.size()== baseline.revisions.size();

                Change currentChange = significantChanges ? Change.SIGNIFICANT : changes ? Change.INSIGNIFICANT : Change.NONE;

                return new PollingResult(baseline, new SVNRevisionState(revs), currentChange);
            }