EAGAIN (Resource temporarily unavailable) error during asrestore

Tools asbackup & asrestore
1

Hi All,

i am seeing EAGAIN (Resource temporarily unavailable) error when i strace one of asrestore threads. I am using aerospike version 3.15.0.1. Below are the strace logs that i am getting however restore thread is working normally and i can see records are being written back to server.

recvfrom(44, 0x7fc6bdcfc410, 8, 16450, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
select(45, NULL, [44], NULL, {10, 0})   = 1 (out [44], left {9, 999998})
sendto(44, "\2\3\0\0\0\0\0\213\26\0\t\0\0\0\0\0\0\1\0K\\]\0\0'\20\0\4\0\1\0\0"..., 147, MSG_NOSIGNAL, NULL, 0) = 147
select(45, [44], NULL, NULL, {9, 999000}) = 1 (in [44], left {9, 998725})
read(44, "\2\3\0\0\0\0\0\26\26\0\0\0\0\0\0\0\0\1\0277\377\262\0\0\0\0\0\0\0\0", 30) = 30
recvfrom(44, 0x7fc6bdcfc410, 8, 16450, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
select(45, NULL, [44], NULL, {9, 999000}) = 1 (out [44], left {9, 998998})
sendto(44, "\2\3\0\0\0\0\0\213\26\0\t\0\0\0\0\0\0\1\0Kk\346\0\0'\20\0\4\0\1\0\0"..., 147, MSG_NOSIGNAL, NULL, 0) = 147
select(45, [44], NULL, NULL, {9, 999000}) = 1 (in [44], left {9, 998359})
read(44, "\2\3\0\0\0\0\0\26\26\0\0\0\0\0\0\0\0\1\0278\17;\0\0\0\0\0\0\0\0", 30) = 30
recvfrom(44, 0x7fc6bdcfc410, 8, 16450, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
select(45, NULL, [44], NULL, {10, 0}^CProcess 5246 detached
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 97.68    0.437763          72      6042           select
  0.98    0.004401           1      3020           sendto
  0.69    0.003080           1      3021      3021 recvfrom
  0.59    0.002665           1      3021           read
  0.05    0.000229           1       270        79 futex
------ ----------- ----------- --------- --------- ----------------
100.00    0.448138                 15374      3100 total

Can anybody please let me know why these are coming? @kporter @pgupta

2

I am not sure whether this should be a concern if the restore is progressing without problems.