Thank you Dave and Khushboo for advises. 1) (re)moving 'pgadmin4.db' - did not help.
2) I have disabled teredo - did not help. 3) localhost is resolved to IPv6 address: $ ping localhost Pinging ogrodowa [::1] with 32 bytes of data: Reply from ::1: time<1ms Reply from ::1: time<1ms Reply from ::1: time<1ms Reply from ::1: time<1ms 4) I DO use IPv4 as well. 5) No entries for localhost in hosts file. 6) On which address/port the server should be listening? $ netstat -a | grep LISTEN | grep "127.0.0.1" TCP 127.0.0.1:3212 ogrodowa:0 LISTENING TCP 127.0.0.1:3213 ogrodowa:0 LISTENING TCP 127.0.0.1:4370 ogrodowa:0 LISTENING TCP 127.0.0.1:4371 ogrodowa:0 LISTENING TCP 127.0.0.1:4380 ogrodowa:0 LISTENING TCP 127.0.0.1:4381 ogrodowa:0 LISTENING TCP 127.0.0.1:5037 ogrodowa:0 LISTENING TCP 127.0.0.1:9990 ogrodowa:0 LISTENING TCP 127.0.0.1:30000 ogrodowa:0 LISTENING TCP 127.0.0.1:49674 ogrodowa:0 LISTENING 7) ping to 127.0.0.1 works well: $ ping 127.0.0.1 Pinging 127.0.0.1 with 32 bytes of data: Reply from 127.0.0.1: bytes=32 time<1ms TTL=128 Reply from 127.0.0.1: bytes=32 time<1ms TTL=128 Reply from 127.0.0.1: bytes=32 time<1ms TTL=128 Reply from 127.0.0.1: bytes=32 time<1ms TTL=128 Not sure what else I need to check... Thank you and kind regards Pawel On 14 July 2017 at 09:15, Dave Page <dp...@pgadmin.org> wrote: > > > On Fri, Jul 14, 2017 at 7:53 AM, Pawel Hadam <had...@gmail.com> wrote: > >> Hi, >> >> I have also installed "pgadmin4-1.6-x86.exe" on Windows 10 PRO (AMD >> FX, 6 cores, 16 GB RAM, SSD) and tried to run it. After 1min 58 sec I >> got a message saying "The application server could not be contacted". >> >> pgAdmin 4 v 1.5 was starting successfully in 55-60 sec. before I did >> this installation. Nothing else has changed, just reinstalled pgAdmin. >> >> Anybody had the same error and any ideas what's wrong? >> > > One change in 1.6 was that we use 127.0.0.1 as the server address instead > of 'localhost'. That was because we found that resolution of 'localhost' to > an address can actually be quite slow on Windows in a Qt app. Do you have > any kind of unusual network setup where 127.0.0.1 wouldn't work? E.g. > *only* IPv6? > > -- > Dave Page > Blog: http://pgsnake.blogspot.com > Twitter: @pgsnake > > EnterpriseDB UK: http://www.enterprisedb.com > The Enterprise PostgreSQL Company >
