Re: [HACKERS] Re: [HACKERS] Re: [HACKERS] Windows service is not starting so there’s message in log: FATAL: "could not create shared memory segment “Global/PostgreSQL.851401618”: Permission denied”

On Wed, Mar 9, 2016 at 10:06 PM, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> On Wed, Mar 9, 2016 at 11:46 AM, Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>
> wrote:
>>
>>
>> I tried replacing the random() with PostmaterRandom() for a test and it
>> worked.
>> This is generating different random values, so the issue is not occurring.
>>
>> "Global/PostgreSQL.2115609797"
>>
>> I feel, we should add the the data directory path + the random number to
>> generate the name for dynamic shared memory, this can fix problem.
>>
>
> As mentioned above, I think if we can investigate why this error is
> generated, that will be helpful. Currently the code ensures that if the
> segment already exists, it should retry to create a segment with other name
> (refer dsm_impl_windows()), so the point of investigation is, why it is not
> going via that path? I am guessing due to some reason CreateFileMapping()
> is returning NULL in this case whereas ideally it should return the existing
> handle with an error ERROR_ALREADY_EXISTS.

DEBUG: mapped win32 error code 5 to 13

Yes, the CreateFileMapping() is returning NULL with an error of
ERROR_ACCESS_DENIED.
I am not able to find the reason for this error. This error is occurring only
when the PostgreSQL is started as a service only.

Regards,
Hari Babu
Fujitsu Australia