[GRASS-user] r.fillnulls hang on one computer, not on another

[Ken Mankoff]

Hi Markus,

On 2022-01-18 at 12:28 -08, Markus Neteler <neteler at osgeo.org> wrote:
> On Tue, Jan 18, 2022 at 9:23 PM Ken Mankoff <mankoff at gmail.com> wrote:
>> I'm trying to run 'r.fillnulls' and it hangs on one computer but not on another.
>>
>
> and then run strace on it
>
> strace -p <pid>


strace prints out things like this (at about 5 Hz):


futex(0x55591e4fad24, FUTEX_WAIT_PRIVATE, 4832, NULL) = 0
futex(0x55591f6fcde4, FUTEX_WAKE_PRIVATE, 2147483647) = 16
futex(0x55591f6fcde4, FUTEX_WAIT_PRIVATE, 4928, NULL) = 0
futex(0x55591e4fad24, FUTEX_WAKE_PRIVATE, 2147483647) = 27
futex(0x55591f6fcde4, FUTEX_WAIT_PRIVATE, 4936, NULL) = -1 EAGAIN (Resource temporarily unavailable)
futex(0x55591f6fcde4, FUTEX_WAIT_PRIVATE, 4952, NULL) = 0
futex(0x55591e4fad24, FUTEX_WAKE_PRIVATE, 2147483647) = 35
futex(0x55591f6fcde4, FUTEX_WAIT_PRIVATE, 4960, NULL) = 0


I'm out of my depth here. It seems like a similar issue elsewhere may point to SSL library issues or that this is a parent thread waiting on another thread. From https://meenakshi02.wordpress.com/2011/02/02/strace-hanging-at-futex/ and 'ps -efL | grep filln', there is only one other PID. If I strace that, all I see is

read(3,

And nothing else...

  -k.