hi!

i work with Google App Engine, I used Gobo-tools to backup and
restores data, i has an erorr:

HTTP ERROR 500

Problem accessing /dump/start.gobo. Reason:

    java.lang.RuntimeException: Unable to complete the HTTP request

Caused by:

java.lang.RuntimeException: java.lang.RuntimeException: Unable to
complete the HTTP request
        at gobo.GoboServlet.processReguest(GoboServlet.java:55)
        at gobo.GoboServlet.doPost(GoboServlet.java:20)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
511)
        at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1166)
        at
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
51)
        at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
        at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
43)
        at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
        at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
122)
        at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
        at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
388)
        at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
        at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
182)
        at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
765)
        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
418)
        at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
70)
        at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
        at com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:351)
        at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
        at org.mortbay.jetty.Server.handle(Server.java:326)
        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
542)
        at org.mortbay.jetty.HttpConnection
$RequestHandler.content(HttpConnection.java:938)
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
        at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
409)
        at org.mortbay.thread.QueuedThreadPool
$PoolThread.run(QueuedThreadPool.java:582)
Caused by: java.lang.RuntimeException: Unable to complete the HTTP
request
        at
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler
$Connection.getHeaderFields(URLFetchServiceStreamHandler.java:218)
        at
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler
$Connection.getHeaderFields(URLFetchServiceStreamHandler.java:74)
        at
com.google.gdata.client.http.HttpGDataRequest.isOAuthProxyErrorResponse(HttpGDataRequest.java:
558)
        at
com.google.gdata.client.http.HttpGDataRequest.checkResponse(HttpGDataRequest.java:
549)
        at
com.google.gdata.client.http.HttpGDataRequest.execute(HttpGDataRequest.java:
530)
        at
com.google.gdata.client.http.GoogleGDataRequest.execute(GoogleGDataRequest.java:
535)
        at com.google.gdata.client.Service.insert(Service.java:1409)
        at com.google.gdata.client.GoogleService.insert(GoogleService.java:
599)
        at
com.google.gdata.client.media.MediaService.insert(MediaService.java:
381)
        at
gobo.service.GbSpreadsheetService.createSpreadsheet(GbSpreadsheetService.java:
200)
        at gobo.controller.dump.StartController.runAuth(StartController.java:
45)
        at gobo.AuthSubBase.run(AuthSubBase.java:70)
        at gobo.GoboServlet.processReguest(GoboServlet.java:43)
        ... 28 more
Caused by: javax.net.ssl.SSLHandshakeException: Could not verify SSL
certificate for: https://docs.google.com/feeds/default/private/full/
        at
com.google.appengine.api.urlfetch.URLFetchServiceImpl.convertApplicationException(URLFetchServiceImpl.java:
114)
        at
com.google.appengine.api.urlfetch.URLFetchServiceImpl.fetch(URLFetchServiceImpl.java:
41)
        at
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler
$Connection.fetchResponse(URLFetchServiceStreamHandler.java:418)
        at
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler
$Connection.getInputStream(URLFetchServiceStreamHandler.java:297)
        at
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler
$Connection.getHeaderFields(URLFetchServiceStreamHandler.java:213)
        ... 40 more

Caused by:

java.lang.RuntimeException: Unable to complete the HTTP request
        at
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler
$Connection.getHeaderFields(URLFetchServiceStreamHandler.java:218)
        at
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler
$Connection.getHeaderFields(URLFetchServiceStreamHandler.java:74)
        at
com.google.gdata.client.http.HttpGDataRequest.isOAuthProxyErrorResponse(HttpGDataRequest.java:
558)
        at
com.google.gdata.client.http.HttpGDataRequest.checkResponse(HttpGDataRequest.java:
549)
        at
com.google.gdata.client.http.HttpGDataRequest.execute(HttpGDataRequest.java:
530)
        at
com.google.gdata.client.http.GoogleGDataRequest.execute(GoogleGDataRequest.java:
535)
        at com.google.gdata.client.Service.insert(Service.java:1409)
        at com.google.gdata.client.GoogleService.insert(GoogleService.java:
599)
        at
com.google.gdata.client.media.MediaService.insert(MediaService.java:
381)
        at
gobo.service.GbSpreadsheetService.createSpreadsheet(GbSpreadsheetService.java:
200)
        at gobo.controller.dump.StartController.runAuth(StartController.java:
45)
        at gobo.AuthSubBase.run(AuthSubBase.java:70)
        at gobo.GoboServlet.processReguest(GoboServlet.java:43)
        at gobo.GoboServlet.doPost(GoboServlet.java:20)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
511)
        at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1166)
        at
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
51)
        at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
        at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
43)
        at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
        at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
122)
        at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
        at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
388)
        at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
        at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
182)
        at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
765)
        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
418)
        at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
70)
        at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
        at com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:351)
        at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
        at org.mortbay.jetty.Server.handle(Server.java:326)
        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
542)
        at org.mortbay.jetty.HttpConnection
$RequestHandler.content(HttpConnection.java:938)
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
        at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
409)
        at org.mortbay.thread.QueuedThreadPool
$PoolThread.run(QueuedThreadPool.java:582)
Caused by: javax.net.ssl.SSLHandshakeException: Could not verify SSL
certificate for: https://docs.google.com/feeds/default/private/full/
        at
com.google.appengine.api.urlfetch.URLFetchServiceImpl.convertApplicationException(URLFetchServiceImpl.java:
114)
        at
com.google.appengine.api.urlfetch.URLFetchServiceImpl.fetch(URLFetchServiceImpl.java:
41)
        at
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler
$Connection.fetchResponse(URLFetchServiceStreamHandler.java:418)
        at
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler
$Connection.getInputStream(URLFetchServiceStreamHandler.java:297)
        at
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler
$Connection.getHeaderFields(URLFetchServiceStreamHandler.java:213)
        ... 40 more

Caused by:

javax.net.ssl.SSLHandshakeException: Could not verify SSL certificate
for: https://docs.google.com/feeds/default/private/full/
        at
com.google.appengine.api.urlfetch.URLFetchServiceImpl.convertApplicationException(URLFetchServiceImpl.java:
114)
        at
com.google.appengine.api.urlfetch.URLFetchServiceImpl.fetch(URLFetchServiceImpl.java:
41)
        at
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler
$Connection.fetchResponse(URLFetchServiceStreamHandler.java:418)
        at
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler
$Connection.getInputStream(URLFetchServiceStreamHandler.java:297)
        at
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler
$Connection.getHeaderFields(URLFetchServiceStreamHandler.java:213)
        at
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler
$Connection.getHeaderFields(URLFetchServiceStreamHandler.java:74)
        at
com.google.gdata.client.http.HttpGDataRequest.isOAuthProxyErrorResponse(HttpGDataRequest.java:
558)
        at
com.google.gdata.client.http.HttpGDataRequest.checkResponse(HttpGDataRequest.java:
549)
        at
com.google.gdata.client.http.HttpGDataRequest.execute(HttpGDataRequest.java:
530)
        at
com.google.gdata.client.http.GoogleGDataRequest.execute(GoogleGDataRequest.java:
535)
        at com.google.gdata.client.Service.insert(Service.java:1409)
        at com.google.gdata.client.GoogleService.insert(GoogleService.java:
599)
        at
com.google.gdata.client.media.MediaService.insert(MediaService.java:
381)
        at
gobo.service.GbSpreadsheetService.createSpreadsheet(GbSpreadsheetService.java:
200)
        at gobo.controller.dump.StartController.runAuth(StartController.java:
45)
        at gobo.AuthSubBase.run(AuthSubBase.java:70)
        at gobo.GoboServlet.processReguest(GoboServlet.java:43)
        at gobo.GoboServlet.doPost(GoboServlet.java:20)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
511)
        at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1166)
        at
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
51)
        at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
        at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
43)
        at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
        at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
122)
        at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
        at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
388)
        at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
        at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
182)
        at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
765)
        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
418)
        at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
70)
        at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
        at com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:351)
        at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
        at org.mortbay.jetty.Server.handle(Server.java:326)
        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
542)
        at org.mortbay.jetty.HttpConnection
$RequestHandler.content(HttpConnection.java:938)
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
        at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
409)
        at org.mortbay.thread.QueuedThreadPool
$PoolThread.run(QueuedThreadPool.java:582)

i can't handle that error, i follow by guideline of link:
http://code.google.com/p/gobo-tools/wiki/HowToInstall to install and
setup environment for Gobo-tools, but i stuck with that error!
please help me to fix that error?

thank you for your help!

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