[Rock-dev] [rock] #225: pocolog: the stream aligner sometimes mistakes samples from a stream for samples in another stream

[rock]

#225: pocolog: the stream aligner sometimes mistakes samples from a stream for
samples in another stream
----------------------------+-----------------------------------
 Reporter:  sylvain.joyeux  |      Owner:  rock-dev-mailing-list
     Type:  defect          |     Status:  new
 Priority:  major           |  Milestone:
Component:  base            |   Keywords:
----------------------------+-----------------------------------
 The attached tgz contains a script that triggers the bug (test.rb) and a
 set of logfiles. Simply run

   ruby test.rb log/

 I've added some sanity checks in pocolog to get a proper error message (we
 were getting before a weird error in typelib unmarshalling).

 Anyways, the error is:

   /home/doudou/dev/rock/rock-toolchain-
 master/tools/pocolog/lib/pocolog/data_reader.rb:243:in `seek': index
 returned index=807 and pos=111690 as position for seek(807) but it seems
 to be a sample in stream /eslam.transformer_status while we were expecting
 /eslam.pose_samples (Pocolog::InternalError)
         from /home/doudou/dev/rock/rock-toolchain-
 master/tools/pocolog/lib/pocolog/stream_aligner.rb:453:in `step'
         from /home/doudou/dev/rock/rock-toolchain-
 master/tools/orocos.rb/lib/orocos/log/replay.rb:455:in `step'
         from /home/doudou/dev/rock/rock-toolchain-
 master/tools/orocos.rb/lib/orocos/log/replay.rb:536:in `run'
         from /home/doudou/tmp/pocolog_crash/crash/analyse.rb:74:in
 `trajectory_error'
         from test.rb:4:in `<main>'

 To me, it looks like pocolog's stream aligner gives a position of a block
 to the wrong stream object.

-- 
Ticket URL: <https://rock.opendfki.de/ticket/225>
rock <https://rock.opendfki.de>
rock: the robot construction kit