Tickets :: Comment on [#12930] AS: Endless loop with Windows Phone 7.8

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Comment	> Hi, > > I've one box that somehow triggers an endless loop via ActiveSync > until the PHP timeout is reached. > > The Samsung phone sends a request and the httpd process gets stuck in > a loop, eating up 100% CPU time. I've tried to attach "strace" to it > but it does not communicate anything with the linux kernel, so I > guess it's stuck in a loop. > > The last bits I see in the ActiveSync log look like this: > > 2014-01-21T11:59:45+01:00 ef6bd35e390f8ed625df47ceaee3ae1f DEBUG: > [18254] I <Folder> > 2014-01-21T11:59:45+01:00 ef6bd35e390f8ed625df47ceaee3ae1f DEBUG: > [18254] I <SyncKey> > 2014-01-21T11:59:45+01:00 ef6bd35e390f8ed625df47ceaee3ae1f DEBUG: > [18254] I {52cbc9bb-e888-4cd3-92ed-17f95c4fb70f}1 > 2014-01-21T11:59:45+01:00 ef6bd35e390f8ed625df47ceaee3ae1f DEBUG: > [18254] I </SyncKey> > 2014-01-21T11:59:45+01:00 ef6bd35e390f8ed625df47ceaee3ae1f DEBUG: > [18254] I <FolderId> > 2014-01-21T11:59:45+01:00 ef6bd35e390f8ed625df47ceaee3ae1f DEBUG: > [18254] I RI > 2014-01-21T11:59:45+01:00 ef6bd35e390f8ed625df47ceaee3ae1f DEBUG: > [18254] I </FolderId> > 2014-01-21T11:59:45+01:00 ef6bd35e390f8ed625df47ceaee3ae1f DEBUG: > [18254] I <Options> > 2014-01-21T11:59:45+01:00 ef6bd35e390f8ed625df47ceaee3ae1f DEBUG: > [18254] I <MaxItems> > > The full sync log of the device is attached to this report. > > Horde_ActiveSync version is 2.8.5. Any known, related issue? > > I'm currently thinking about ways to debug this since I don't have > any hint what might be wrong. > My first uneducated guess is that something is wrong in the binary > WBXML data and we run into an endless loop while decoding it. Just a > wild theory though. > > Installing xdebug will probably slow down the productive box to a crawl :( > > May be "gdb" might do the trick to debug this: > http://derickrethans.nl/what-is-php-doing.html > > Cheers, > Thomas >
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