Do tell... Interesting. Any pointers?
-----Original Message----- From: Ben Chambers [mailto:bchamb...@google.com.INVALID] Sent: Friday, September 22, 2017 12:50 PM To: dev@beam.apache.org Cc: d...@tika.apache.org Subject: Re: TikaIO concerns Regarding specifically elements that are failing -- I believe some other IO has used the concept of a "Dead Letter" side-output,, where documents that failed to process are side-output so the user can handle them appropriately. On Fri, Sep 22, 2017 at 9:47 AM Eugene Kirpichov <kirpic...@google.com.invalid> wrote: > Hi Tim, > From what you're saying it sounds like the Tika library has a big > problem with crashes and freezes, and when applying it at scale (eg. > in the context of Beam) requires explicitly addressing this problem, > eg. accepting the fact that in many realistic applications some > documents will just need to be skipped because they are unprocessable? > This would be first example of a Beam IO that has this concern, so I'd > like to confirm that my understanding is correct. > > On Fri, Sep 22, 2017 at 9:34 AM Allison, Timothy B. > <talli...@mitre.org> > wrote: > > > Reuven, > > > > Thank you! This suggests to me that it is a good idea to integrate > > Tika with Beam so that people don't have to 1) (re)discover the need > > to make their wrappers robust and then 2) have to reinvent these > > wheels for robustness. > > > > For kicks, see William Palmer's post on his toe-stubbing efforts > > with Hadoop [1]. He and other Tika users independently have wound > > up carrying out exactly your recommendation for 1) below. > > > > We have a MockParser that you can get to simulate regular > > exceptions, > OOMs > > and permanent hangs by asking Tika to parse a <mock> xml [2]. > > > > > However if processing the document causes the process to crash, > > > then it > > will be retried. > > Any ideas on how to get around this? > > > > Thank you again. > > > > Cheers, > > > > Tim > > > > [1] > > > http://openpreservation.org/blog/2014/03/21/tika-ride-characterising-w > eb-content-nanite/ > > [2] > > > https://github.com/apache/tika/blob/master/tika-parsers/src/test/resou > rces/test-documents/mock/example.xml > > >
