The error might be confusing since it is a programmer-ese statement from
the parser instead of simple English sentence.
The programmer-ese is straightforward to decode from the provided example.
One of the variables on the left side regular expressions or the left side
of the string comparison is empty.
In Puppet 3 this would cause a comparison against the false empty string
value "".
In Puppet 4 any place code depended upon the kerning of nil values to
strings causes errors like this. For instance, I have a considerable
amount of code in a Puppet 3 environment that is impacted by this,
including some publicly available code.
Missing variable statements like this are simple enough to troubleshoot and
only require very basic programming skills to do so.
The first option is to replace the code with a simple series of notify() or
other 'printing' statements with the variables encoded inside strings since
interpolation of a nil string won't cause the parser to fail.
The second option is to rewrite the code to use nested if statements. Then
the parser should return the line with the bad variable:
if ($::enable_nfsd !~ /^false$/) {
if ($:: enable_nfsd =~ /^true$/) {
# ... code ...
}
if ($::local_nfsd == "true") {
# ... code ...
}
}
Note that you'd want to abstract the '... code ...' into a shared block if
you were going to keep the refactored one-line-per-variable statements.
Of course, both of these techniques can be combined.
Once you know that you can trace back to discover where the missing
variable is not being set.
So, which variable is missing?
On Friday, January 22, 2016 at 5:04:09 PM UTC-6, Hunter Haugen wrote:
>
> I don't see anything in that line that is incompatible with puppet 4's
> parser. Perhaps previous lines that set the values of $enable_nfsd or
> $local_nfsd are affected by the parser?
>
>
>
> -Hunter
>
> On Fri, Jan 22, 2016 at 11:30 AM, <[email protected] <javascript:>>
> wrote:
>
>> The values are defined and this class is working with puppet3 but showing
>> error when i use parser=future. Any syntax errors/pup4 compatibility issue
>> with this code ?
>>
>> On Friday, January 22, 2016 at 12:53:57 PM UTC-6, Trevor Vaughan wrote:
>>>
>>> From the error, I would say that not all of those values are defined at
>>> that point and that's why you're seeing issues.
>>>
>>> You'll need to rewrite the statement to check if the variables are
>>> defined.
>>>
>>> Trevor
>>>
>>> On Fri, Jan 22, 2016 at 12:38 PM, <[email protected]> wrote:
>>>
>>>> I typed the code here. It's a typo here in the post. Still getting the
>>>> error.
>>>>
>>>> On Friday, January 22, 2016 at 11:24:33 AM UTC-6, Trevor Vaughan wrote:
>>>>>
>>>>> If that's a copy/paste, then your second occurrence of enable_nfsd is
>>>>> misspelled.
>>>>>
>>>>> Trevor
>>>>>
>>>>> On Fri, Jan 22, 2016 at 11:51 AM, <[email protected]> wrote:
>>>>>
>>>>>> I'm planning to migrate puppet3.8 to 4.x, so testing the
>>>>>> compatibility of code by using parser=future in puppet.conf file and was
>>>>>> stuck at the following error when i run puppet agent. The error is
>>>>>> pointing
>>>>>> at the regular expression. Any help is appreciated.
>>>>>>
>>>>>> Code:
>>>>>> ---------------
>>>>>> if ($::enable_nfsd !~ /^false$/) and (($:: enable_nfsd =~ /^true$/)
>>>>>> or ($::local_nfsd == "true"))
>>>>>>
>>>>>> ---------------
>>>>>>
>>>>>>
>>>>>> Error 400 on server: Evaluation Error: left match operand must result
>>>>>> in a string value. Got an undef value at *****.pp .
>>>>>>
>>>>>> --
>>>>>> You received this message because you are subscribed to the Google
>>>>>> Groups "Puppet Users" group.
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>>>>>> send an email to [email protected].
>>>>>> To view this discussion on the web visit
>>>>>> https://groups.google.com/d/msgid/puppet-users/abda8229-0c5a-417e-bebd-eefc2b545b50%40googlegroups.com
>>>>>>
>>>>>> <https://groups.google.com/d/msgid/puppet-users/abda8229-0c5a-417e-bebd-eefc2b545b50%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>>>> .
>>>>>> For more options, visit https://groups.google.com/d/optout.
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Trevor Vaughan
>>>>> Vice President, Onyx Point, Inc
>>>>> (410) 541-6699
>>>>>
>>>>> -- This account not approved for unencrypted proprietary information --
>>>>>
>>>> --
>>>> You received this message because you are subscribed to the Google
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>>>> To view this discussion on the web visit
>>>> https://groups.google.com/d/msgid/puppet-users/36c5a2a3-42ec-4bad-922d-ab04401475f0%40googlegroups.com
>>>>
>>>> <https://groups.google.com/d/msgid/puppet-users/36c5a2a3-42ec-4bad-922d-ab04401475f0%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>> .
>>>>
>>>> For more options, visit https://groups.google.com/d/optout.
>>>>
>>>
>>>
>>>
>>> --
>>> Trevor Vaughan
>>> Vice President, Onyx Point, Inc
>>> (410) 541-6699
>>>
>>> -- This account not approved for unencrypted proprietary information --
>>>
>> --
>> You received this message because you are subscribed to the Google Groups
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>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to [email protected] <javascript:>.
>> To view this discussion on the web visit
>> https://groups.google.com/d/msgid/puppet-users/5d728aac-a11e-4698-8d5f-3e5ef30239f7%40googlegroups.com
>>
>> <https://groups.google.com/d/msgid/puppet-users/5d728aac-a11e-4698-8d5f-3e5ef30239f7%40googlegroups.com?utm_medium=email&utm_source=footer>
>> .
>>
>> For more options, visit https://groups.google.com/d/optout.
>>
>
>
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