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Hi Andy,

 From the host storing the file:

[root@storage-5-18 ~]# xrdadler32 root://localhost//xrd/srm-test/mover-test.1
063301c4 /xrd/srm-test/mover-test.1 root://localhost//xrd/srm-test/mover-test.1

Patrick

On 2/19/20 7:12 AM, Andrew Hanushevsky wrote:
> Hi Patrick,
> 
> Uhmmm, how about the output of the xrdadler command run on the server against 
> the same file the query checksum is beig targeted?
> 
> Andy
> 
> On Wed, 19 Feb 2020, Patrick McGuigan wrote:
> 
>> Hi Andy,
>>
>> [root@admin ~]# xrdcp -np -f --cksum adler32:print test-transfer 
>> root://storage-5-18:1094//xrd/srm-test/mover-test.1
>> Run: [ERROR] Invalid response
>> [root@admin ~]# echo $?
>> 53
>>
>> Attached is the output of the same command with the -d3 switch (the 
>> transferred file is 4 bytes).
>>
>> Patrick
>>
>>
>> On 2/19/20 5:58 AM, Andrew Hanushevsky wrote:
>>> Hi Patrick,
>>>
>>> Coud run that command by hand on a failing file and post the output as well 
>>> as what the return code was.
>>>
>>> Andy
>>>
>>>
>>> On Wed, 19 Feb 2020, Patrick McGuigan wrote:
>>>
>>>> Hi Andy,
>>>>
>>>> It is the command from the xrootd-client rpm.
>>>>
>>>> Patrick
>>>>
>>>> On 2/19/20 5:45 AM, Andrew Hanushevsky wrote:
>>>>> Goo question Rob. We provide the xrdadler command but not a script. So,t he 
>>>>> first question should have been is this a script or the actual command.
>>>>>
>>>>> Andy
>>>>> On Wed, 19 Feb 2020, Robert Gardner wrote:
>>>>>
>>>>>> Who provides said external script?
>>>>>>
>>>>>>
>>>>>>> On Feb 19, 2020, at 5:34 AM, Andrew Hanushevsky 
>>>>>>> <[log in to unmask]> wrote:
>>>>>>>
>>>>>>> Hi Patrick,
>>>>>>>
>>>>>>> In the first case, the config says hat an external script is supposed to 
>>>>>>> computed the checksum. If the external script produces an incorrect 
>>>>>>> response, the client will get it and complain. The second case says that 
>>>>>>> the checksum is to be computed using the internal native mechanism. In 
>>>>>>> this case, a corect response will always be sent. Hence, it will work. We 
>>>>>>> reccomend that the internal mechanism be used when it is possible to do 
>>>>>>> so. That said, ot would be interestin to know what the hiccup is in the 
>>>>>>> external script.
>>>>>>>
>>>>>>> Andy
>>>>>>>
>>>>>>> On Wed, 19 Feb 2020, Patrick McGuigan wrote:
>>>>>>>
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> I noticed something odd recently and I am curios if the issue is a known 
>>>>>>>> feature, or something that needs to be worked on?
>>>>>>>>
>>>>>>>> A client process was moving files with xrdcp using:
>>>>>>>>
>>>>>>>> xrdcp -f -np --cksum adler32:print test-transfer 
>>>>>>>> root://some-server//some-path
>>>>>>>>
>>>>>>>> and the command fails with:
>>>>>>>>
>>>>>>>> Run: [ERROR] Invalid response
>>>>>>>>
>>>>>>>> Tracking this down leads me to the problem in the data server's 
>>>>>>>> configuration:
>>>>>>>>
>>>>>>>> xrootd.chksum adler32 /usr/bin/xrdadler32
>>>>>>>>
>>>>>>>>
>>>>>>>> However, if the checksum is configured as:
>>>>>>>>
>>>>>>>> xrootd.chksum max 4 adler32
>>>>>>>>
>>>>>>>> The xrdcp will work correctly.
>>>>>>>>
>>>>>>>>
>>>>>>>> Before anyone asks, yes, checksums work correctly outside of xrdcp:
>>>>>>>>
>>>>>>>> xrdadler32 root://some-server//some-path
>>>>>>>>
>>>>>>>> as well as:
>>>>>>>>
>>>>>>>> xrdfs some-server query checksum /some-path
>>>>>>>>
>>>>>>>>
>>>>>>>> I have seen this occur with versions 4.9.1 and 4.10.0.
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>>
>>>>>>>> Patrick
>>>>>>>>
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