Moses-support Digest, Vol 112, Issue 4

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Today's Topics:

1. Re: Segmentation fault on hierarchical model with moses in
server mode (Martin Baumg?rtner)


----------------------------------------------------------------------

Message: 1
Date: Mon, 1 Feb 2016 16:32:11 +0100
From: Martin Baumg?rtner <martin.baumgaertner@star-group.net>
Subject: Re: [Moses-support] Segmentation fault on hierarchical model
with moses in server mode
To: Barry Haddow <bhaddow@staffmail.ed.ac.uk>, Matthias Huck
<mhuck@inf.ed.ac.uk>, Hieu Hoang <hieuhoang@gmail.com>, Ulrich Germann
<ugermann@inf.ed.ac.uk>
Cc: "moses-support@mit.edu" <moses-support@mit.edu>
Message-ID: <56AF7A7B.6000300@star-group.net>
Content-Type: text/plain; charset="utf-8"

Hi Barry,

sorry, my mistake ...

Here comes the experiment with the *same* string:

1. COMMAND-LINE:

% echo 'das ist ein haus' | moses -f string-to-tree/moses.ini

Defined parameters (per moses.ini or switch):
config: string-to-tree/moses.ini
cube-pruning-pop-limit: 1000
feature: KENLM name=LM factor=0 order=3 num-features=1
path=lm/europarl.srilm.gz WordPenalty UnknownWordPenalty
PhraseDictionaryMemory input-factor=0 output-factor=0
path=string-to-tree/rule-table num-features=1 table-limit=20
input-factors: 0
inputtype: 3
mapping: 0 T 0
max-chart-span: 20 1000
non-terminals: X S
search-algorithm: 3
translation-details: translation-details.log
weight: WordPenalty0= 0 LM= 0.5 PhraseDictionaryMemory0= 0.5
line=KENLM name=LM factor=0 order=3 num-features=1
path=lm/europarl.srilm.gz
Loading the LM will be faster if you build a binary file.
Reading lm/europarl.srilm.gz
----5---10---15---20---25---30---35---40---45---50---55---60---65---70---75---80---85---90---95--100
**The ARPA file is missing <unk>. Substituting log10 probability
-100.000.
**************************************************************************************************
FeatureFunction: LM start: 0 end: 0
line=WordPenalty
FeatureFunction: WordPenalty0 start: 1 end: 1
line=UnknownWordPenalty
FeatureFunction: UnknownWordPenalty0 start: 2 end: 2
line=PhraseDictionaryMemory input-factor=0 output-factor=0
path=string-to-tree/rule-table num-features=1 table-limit=20
FeatureFunction: PhraseDictionaryMemory0 start: 3 end: 3
Loading LM
Loading WordPenalty0
Loading UnknownWordPenalty0
Loading PhraseDictionaryMemory0
Start loading text phrase table. Moses format : [0.773] seconds
Reading string-to-tree/rule-table
----5---10---15---20---25---30---35---40---45---50---55---60---65---70---75---80---85---90---95--100
****************************************************************************************************
max-chart-span: 20
Created input-output object : [0.773] seconds
Line 0: Initialize search took 0.000 seconds total
Translating: <s> das ist ein haus </s> ||| [0,0]=X (1) [0,1]=X (1)
[0,2]=X (1) [0,3]=X (1) [0,4]=X (1) [0,5]=X (1) [1,1]=X (1) [1,2]=X
(1) [1,3]=X (1) [1,4]=X (1) [1,5]=X (1) [2,2]=X (1) [2,3]=X (1)
[2,4]=X (1) [2,5]=X (1) [3,3]=X (1) [3,4]=X (1) [3,5]=X (1) [4,4]=X
(1) [4,5]=X (1) [5,5]=X (1)

0 1 2 3 4 5
0 3 2 2 1 0
0 0 0 2 0
0 0 4 0
0 8 0
0 0
1
BEST TRANSLATION: 31 TOP -> <s> S </s> :1-1 : term=: nonterm=1-1 :
c=-3.206 core=(-6.413,-2.000,0.000,0.000) [0..5] 15 [total=-12.332]
core=(-22.361,-6.000,0.000,-2.303)
this is a house
Line 0: Additional reporting took 0.000 seconds total
Line 0: Translation took 0.001 seconds total
Translation took 0.010 seconds
Name:moses VmPeak:79168 kB VmRSS:7432 kB RSSMax:35968 kB
user:0.758 sys:0.021 CPU:0.780 real:0.776


2.) SERVER:

% /home/maba/bin/moses --server --config string-to-tree/moses.ini

Defined parameters (per moses.ini or switch):
config: string-to-tree/moses.ini
cube-pruning-pop-limit: 1000
feature: KENLM name=LM factor=0 order=3 num-features=1
path=lm/europarl.srilm.gz WordPenalty UnknownWordPenalty
PhraseDictionaryMemory input-factor=0 output-factor=0
path=string-to-tree/rule-table num-features=1 table-limit=20
input-factors: 0
inputtype: 3
mapping: 0 T 0
max-chart-span: 20 1000
non-terminals: X S
search-algorithm: 3
server:
translation-details: translation-details.log
weight: WordPenalty0= 0 LM= 0.5 PhraseDictionaryMemory0= 0.5
line=KENLM name=LM factor=0 order=3 num-features=1
path=lm/europarl.srilm.gz
Loading the LM will be faster if you build a binary file.
Reading lm/europarl.srilm.gz
----5---10---15---20---25---30---35---40---45---50---55---60---65---70---75---80---85---90---95--100
**The ARPA file is missing <unk>. Substituting log10 probability
-100.000.
**************************************************************************************************
FeatureFunction: LM start: 0 end: 0
line=WordPenalty
FeatureFunction: WordPenalty0 start: 1 end: 1
line=UnknownWordPenalty
FeatureFunction: UnknownWordPenalty0 start: 2 end: 2
line=PhraseDictionaryMemory input-factor=0 output-factor=0
path=string-to-tree/rule-table num-features=1 table-limit=20
FeatureFunction: PhraseDictionaryMemory0 start: 3 end: 3
Loading LM
Loading WordPenalty0
Loading UnknownWordPenalty0
Loading PhraseDictionaryMemory0
Start loading text phrase table. Moses format : [0.747] seconds
Reading string-to-tree/rule-table
----5---10---15---20---25---30---35---40---45---50---55---60---65---70---75---80---85---90---95--100
****************************************************************************************************
max-chart-span: 20
RUN SERVER at pid 0
[moses/server/Server.cpp:49] Listening on port 8080
[moses/server/TranslationRequest.cpp:315] Input: das ist ein haus
Translating: <s> das ist ein haus </s>
0 1 2 3 4 5
0 3 2 2 1 0
0 0 0 0 0
0 0 0 0
0 0 0
0 0
0
Translation took 0.000 seconds


=> XML-RPC result after calling (see moses server output just above) ...

% curl --data @rpc.xml '192.168.178.14:8080/RPC2
<http://192.168.178.14:8080/RPC2>'

<?xml version="1.0" encoding="UTF-8"?>
<methodResponse>
<params>
<param><value><struct>
<member><name>text</name>
<value><string></string></value></member>
</struct></value></param>
</params>
</methodResponse>

... with rpc.xml ...

<?xml version="1.0" encoding="UTF-8"?>
<methodCall>
<methodName>translate</methodName>
<params><param><value>
<struct>
<member>
<name>text</name>
<value>
<string>das ist ein haus</string>
</value>
</member>
</struct></value></param>
</params>
</methodCall>


Cheers,
Martin


Am 01.02.2016 um 14:16 schrieb Barry Haddow:
> Hi Martin
>
> In your original mail, you passed different inputs to the server and
> command-line version. The following are extracted from your debug:
>
> command-line:
> Translating: <s> das ist ein haus </s>
>
> server:
> Translating: <s> dies ist ein haus . </s>
>
> (Although you specify the command-line in the first case as "echo
> 'dies ist ein haus' | moses -f string-to-tree/moses.ini", which
> contradicts the debug. I assume you spliced together different runs.)
>
> Could you show an example where you pass the *same* string to the two
> different Moses versions and get different outputs?
>
> cheers - Barry
>
> On 01/02/16 12:47, Martin Baumg?rtner wrote:
>> With the current fix the crash is gone, but there is still an
>> unexpected difference between server mode and command line moses: the
>> first produces an empty string, now, whereas the latter produces
>> "this is a house". I tried another engine (english->chinese) and got
>> the same behaviour - empty string vs. correct translation.
>>
>> Cheers,
>> Martin
>>
>> Am 29.01.2016 um 22:37 schrieb Matthias Huck:
>>> On Fri, 2016-01-29 at 21:26 +0000, Hieu Hoang wrote:
>>>> The decoder should handle no translation without falling over. But
>>>> yes, the model is too toy
>>> Normally the decoder would always produce some translation. (The translation could be an empty sentence, of course.) If it's misconfigured, it should tell you about it. But maybe not with a segmentation fault. :-)
>>>
>>>
>>>> On 29 Jan 2016 9:15 pm, "Matthias Huck"<mhuck@inf.ed.ac.uk> wrote:
>>>>> Hi,
>>>>>
>>>>> It seems to me that this toy string-to-tree setup is either
>>>>> outdated,
>>>>> or it always had issues. It should be replaced.
>>>>>
>>>>> Under real-world conditions, the decoder should always be able to
>>>>> produce some hypothesis. We would therefore usually extract a whole
>>>>> set
>>>>> of glue rules. And we would typically also add an [unknown-lhs]
>>>>> section
>>>>> to the moses.ini that would tell the decoder which left-hand side
>>>>> non
>>>>> -terminal labels to use for out-of-vocabulary words. To my
>>>>> knowledge,
>>>>> these two techniques are crucial for being able to parse any input
>>>>> sentence provided to the chart decoder in syntax-based translation.
>>>>>
>>>>> So, in my opinion, the problem is most likely neither the server
>>>>> implementation nor the syntax-based decoder, but a problematic
>>>>> setup.
>>>>> I would consider it okay for the server to crash (or at least print
>>>>> a
>>>>> warning) under such circumstances. You don't want it to silently
>>>>> not
>>>>> translate complete sentences.
>>>>>
>>>>> (I must admit that I didn't look into it in too much detail, but it
>>>>> sho
>>>>> uld be easy to confirm.)
>>>>>
>>>>> Cheers,
>>>>> Matthias
>>>>>
>>>>>
>>>>> On Fri, 2016-01-29 at 20:28 +0000, Barry Haddow wrote:
>>>>>> Hi All
>>>>>>
>>>>>> I think I see what happened now.
>>>>>>
>>>>>> When you give the input "dies ist ein haus" to the sample model,
>>>>> the
>>>>>> "dies" is unknown, and there is no translation. The server did
>>>>> not check
>>>>>> for this condition, and got a seg fault. I have added a check, so
>>>>> if you
>>>>>> pull and try again it should not crash.
>>>>>>
>>>>>> In the log pasted by Martin, he passed "das ist ein haus" to
>>>>>> command-line Moses, which works, and gives a translation.
>>>>>>
>>>>>> I think ideally the sample models should handle unknown words,
>>>>> and give
>>>>>> a translation. Maybe adding a glue rule would be sufficient?
>>>>>>
>>>>>> cheers - Barry
>>>>>>
>>>>>> On 29/01/16 11:13, Barry Haddow wrote:
>>>>>>> Hi
>>>>>>>
>>>>>>> When I run command-line Moses, I get the output below - i.e. no
>>>>> best
>>>>>>> translation. The server crashes for me since it does not check
>>>>> for the
>>>>>>> null pointer, but the command-line version does.
>>>>>>>
>>>>>>> I think there should be a translation for this example.
>>>>>>>
>>>>>>> cheers - Barry
>>>>>>>
>>>>>>> [gna]bhaddow: echo 'dies ist ein haus' | ~/moses.new/bin/moses
>>>>> -f
>>>>>>> string-to-tree/moses.ini
>>>>>>> Defined parameters (per moses.ini or switch):
>>>>>>> config: string-to-tree/moses.ini
>>>>>>> cube-pruning-pop-limit: 1000
>>>>>>> feature: KENLM name=LM factor=0 order=3 num
>>>>> -features=1
>>>>>>> path=lm/europarl.srilm.gz WordPenalty UnknownWordPenalty
>>>>>>> PhraseDictionaryMemory input-factor=0 output-factor=0
>>>>>>> path=string-to-tree/rule-table num-features=1 table-limit=20
>>>>>>> input-factors: 0
>>>>>>> inputtype: 3
>>>>>>> mapping: 0 T 0
>>>>>>> max-chart-span: 20 1000
>>>>>>> non-terminals: X S
>>>>>>> search-algorithm: 3
>>>>>>> translation-details: translation-details.log
>>>>>>> weight: WordPenalty0= 0 LM= 0.5
>>>>> PhraseDictionaryMemory0= 0.5
>>>>>>> line=KENLM name=LM factor=0 order=3 num-features=1
>>>>> path=lm/europarl.srilm.gz
>>>>>>> Loading the LM will be faster if you build a binary file.
>>>>>>> Reading lm/europarl.srilm.gz
>>>>>>> ----5---10---15---20---25---30---35---40---45---50---55---60--
>>>>> -65---70---75---80---85---90---95--100
>>>>>>> **The ARPA file is missing . Substituting log10 probability
>>>>> -100.000.
>>>>> *******************************************************************
>>>>> *******************************
>>>>>>> FeatureFunction: LM start: 0 end: 0
>>>>>>> line=WordPenalty
>>>>>>> FeatureFunction: WordPenalty0 start: 1 end: 1
>>>>>>> line=UnknownWordPenalty
>>>>>>> FeatureFunction: UnknownWordPenalty0 start: 2 end: 2
>>>>>>> line=PhraseDictionaryMemory input-factor=0 output-factor=0
>>>>>>> path=string-to-tree/rule-table num-features=1 table-limit=20
>>>>>>> FeatureFunction: PhraseDictionaryMemory0 start: 3 end: 3
>>>>>>> Loading LM
>>>>>>> Loading WordPenalty0
>>>>>>> Loading UnknownWordPenalty0
>>>>>>> Loading PhraseDictionaryMemory0
>>>>>>> Start loading text phrase table. Moses format : [3.038] seconds
>>>>>>> Reading string-to-tree/rule-table
>>>>>>> ----5---10---15---20---25---30---35---40---45---50---55---60--
>>>>> -65---70---75---80---85---90---95--100
>>>>> *******************************************************************
>>>>> *********************************
>>>>>>> max-chart-span: 20
>>>>>>> Created input-output object : [3.041] seconds
>>>>>>> Line 0: Initialize search took 0.000 seconds total
>>>>>>> Translating: dies ist ein haus ||| [0,0]=X (1) [0,1]=X (1)
>>>>>>> [0,2]=X (1) [0,3]=X (1) [0,4]=X (1) [0,5]=X (1) [1,1]=X (1)
>>>>> [1,2]=X (1)
>>>>>>> [1,3]=X (1) [1,4]=X (1) [1,5]=X (1) [2,2]=X (1) [2,3]=X (1)
>>>>> [2,4]=X (1)
>>>>>>> [2,5]=X (1) [3,3]=X (1) [3,4]=X (1) [3,5]=X (1) [4,4]=X (1)
>>>>> [4,5]=X (1)
>>>>>>> [5,5]=X (1)
>>>>>>>
>>>>>>> 0 1 2 3 4 5
>>>>>>> 0 1 2 2 1 0
>>>>>>> 0 0 0 2 0
>>>>>>> 0 0 4 0
>>>>>>> 0 0 0
>>>>>>> 0 0
>>>>>>> 0
>>>>>>> Line 0: Additional reporting took 0.000 seconds total
>>>>>>> Line 0: Translation took 0.002 seconds total
>>>>>>> Translation took 0.000 seconds
>>>>>>> Name:moses VmPeak:74024 kB VmRSS:11084 kB RSSMax:36832 kB
>>>>>>> user:2.972 sys:0.048 CPU:3.020 real:3.058
>>>>>>>
>>>>>>>
>>>>>>> On 29/01/16 00:40, Hieu Hoang wrote:
>>>>>>>> If it works ok on the command line but crashes when using the
>>>>> server,
>>>>>>>> then that suggest a server issue.
>>>>>>>>
>>>>>>>> I don't know much about the server code, to be honest.
>>>>>>>>
>>>>> --
>>>>> The University of Edinburgh is a charitable body, registered in
>>>>> Scotland, with registration number SC005336.
>>>>>
>>>>>
>>
>> --
>>
>> *STAR Group* <http://www.star-group.net>
>> <http://www.star-group.net/>
>>
>> *Martin Baumg?rtner*
>>
>> STAR Language Technology & Solutions GmbH
>> Umberto-Nobile-Stra?e 19 | 71063 Sindelfingen | Germany
>> Tel. +49 70 31-4 10 92-0
>> <mailto:martin.baumgaertner@star-group.net>martin.baumgaertner@star-group.net
>>
>> Fax +49 70 31-4 10 92-70 www.star-group.net
>> <http://www.star-group.net/>
>> Gesch?ftsf?hrer: Oliver Rau, Bernd Barth
>> Handelsregister Stuttgart HRB 245654 | St.-Nr. 56098/11677
>>
>
>
>
> The University of Edinburgh is a charitable body, registered in
> Scotland, with registration number SC005336.

--

*STAR Group* <http://www.star-group.net>
<http://www.star-group.net/>

*Martin Baumg?rtner*

STAR Language Technology & Solutions GmbH
Umberto-Nobile-Stra?e 19 | 71063 Sindelfingen | Germany
Tel. +49 70 31-4 10 92-0 martin.baumgaertner@star-group.net
<mailto:martin.baumgaertner@star-group.net>
Fax +49 70 31-4 10 92-70 www.star-group.net <http://www.star-group.net/>
Gesch?ftsf?hrer: Oliver Rau, Bernd Barth
Handelsregister Stuttgart HRB 245654 | St.-Nr. 56098/11677

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