pgadmin4 postgresql application server could not be contacted

Question

I have installed PostgreSQL 9 6 2 on my Windows 8 1  But the pgadmin4 is not able to contact the local server  I have tried several solutions suggested here in stackoverflow  tried to uninstall and reinstall PostgreSQL 9 6 2   tried to modify the config py  config distro py  and delete the files in Roaming folder i tried standalone pgadmin4 installation  but no success However  in my local machine i am able to access the server using psql exe and log as as superuser  postgres user   Can you please suggest any possible solutions to starting running pgadmin4   Thank you

User · Answer

We got the same issue  so no any change in the file  but start pgAdmin 4 using administrator   The following step  1  right click pgAdmin 4 icon 2  select  Run As Administrator

User · Answer

if you are using Mac OS X here is a fix  Open terminal and run this command   pg ctl -D  usr local var postgres -l  usr local var postgres server log restart   and for other OS just restart your Postgresql server  it will solve  Then start pgAdmin4  it will start as normal  Share or comment if saved someone

User · Answer

I ran into this issue as well   Windows 10   I had older version of pgAdmin 4  1 6  and 2 0   I guess both are older now   In any case a complete uninstall of both versions and a reinstall of 2 0 worked

User · Answer

Got this issue after I upgraded PostgreSQL 9 4 to 9 6  The 9 4 binary package had PgAdmin 3 while 9 6 came with PgAdmin 4  I resolved it after a clean installation  I completely uninstalled and reinstalled  of PostgreSQL     However  under different circumstances  you could try running the pgAdmin 4 application as an Administrator  This should fix the error

User · Answer

It seems in most of the cases Postgres trying to use information from previous sessions to find connect the server and failing  Clearing out the previous session info helped me  it is a combination of 2 already mentioned answers above    Navigate to Postgres session s folder  C  Users YourUsernameOrAdmin AppData Roaming pgAdmin sessions  Delete all the data from this folder  Start PgAdmin in administrator mode    Cheers

User · Answer

Kill it in Windows Task Manager and then try again  It seems that there is some sort of a problem when accessing the server from different applications

User · Answer

I was able to solve the problem by changing the pgAdmin web interface port   I believe this problem occurred on my computer because I have several other services consuming webs ports like qBittorrent  IDEJetbrains  etc   Right-clicking on the pgAdmin logo near the clock is possible to configure it

User · Answer

Have you recently installed a new version of pgAdmin    This issue  and the misleading message  is simply due to the fact that old versions of pgAdmin are unable to read the settings saved by a newer version of pgAdmin    Make sure you re starting the right version of pgAdmin  your shortcuts are likely to point to the old version    and or uninstall the old version  the upgrade wizard doesn t do it for you

User · Answer

downloaded pgadmin 4 v2 0 and install it no problem atm on force installation  try it  that was solution for me

User · Answer

I had this problem with pgadmin4 v2 1 on linux fedora 27  Solved by installing a missing dependency   python3-flask-babelex

User · Answer

Just click on that pgadmin 4 icon and run as administrator  Allow the access permissions  It will start locally

User · Answer

I had the same issue on Windows 10  with a new installation of PostgreSQL 10   I solved it by including the path C  PostgreSQL 10 bin   your path to postgresql  bin  to system environment variables   To access environment variables  Control Panel   System and security   System or right click on PC  then   Advance system settings   Environment variables   System variables   Path   Edit

User · Answer

Happens mostly when you have multiple versions of pgadmin installed or while trying to upgrade  Even I tried everything from killing the  running PID on port 5432  to  changing the server mode   In my case I uninstall postgres and re-install it again on different port 5433    Later  I opened it through cmd right click on cmd and select  run cmd as an Administrator

User · Answer

I Fixed it in windows 10 just running pgAdmin 4 as Run as Administrator

User · Answer

It worked for me after installing python2 7 for pgAdmin 4 v2

User · Answer

What finally worked was downgrading to pgadminIII-v 1 22

User · Answer

A variety of reasons attribute to the failure boot of pgAdmin 4  The reason to my situation is that my Windows system language is not English or utf-8 related  Changing the system locale to English solved the starting issue

User · Answer

You should downgrade to pgadmin3  It Worked for me on windows 10 1 with postrgreSQL 9 6

User · Answer

If none of the methods help try checking your system and user environments PATH and PYTHONPATH variables   I was getting this error due to my PATH variable was pointing to different Python installation  which comes from ArcGIS Desktop    After removing path to my Python installation from PATH variable and completely removing PYTHONPATH variable  I got it working   Keep in mind that python command will not be available from command line if you remove it from PATH

User · Answer

I had the same problem  but running it as an admin worked

User · Answer

I ve been dealing with this for awhile  frustrating    So much that I have instructions on my desktop consolidating all of these ideas  Here is my magic combination to the solution    Delete from App Data C  Users  USERNAME  AppData Roaming pgAdmin Add to Path Variables C  Program Files PostgreSQL 9 6 bin  I actually added it to both user and system  Right click and start as admin    You don t have to do this every time but when it gets out of wack try these steps

User · Answer

I had same issue on windows  I had v1 6 installed as well as v2 0  Uninstalling v1 6 allowed me to login

User · Answer

This is often a firewall problem  The firewall log then shows dropped packets between 127 0 0 1  and 127 0 0 1   where the latter is the port shown in the Browser to get no connection with  This means  that the connection between pgAdmin client  high port 1  and pgAdmin server  high port 2  is blocked  Check your firewall log and if you find dropped packets like described  adapt your firewall settings accordingly

User · Answer

Deleting contents of folder C  Users User Name AppData Roaming pgAdmin sessions helped me  I was able to start and load the pgAdmin server

User · Answer

Last resort HKEY CURRENT USER Software pgadmin pgadmin4 export delete you know what to do here

User · Answer

I found the same issue when upgrading to pgAdmin 4  v1 6   On Windows I found that clearing out the C  Users  USERNAME  AppData Roaming pgAdmin folder fixed the issue for me  I believe it was attempting to use the sessions from the prior version and was failing  I know the question was marked as answered  but downgrading may not always be an option   Note  AppData Roaming pgAdmin is a hidden folder

User · Answer

If you use older postgresql version like 9 x and its services is running PgAdmin 4 confused which server is base database   So stop the service older version or new one Run PgAdmin 4 as Administrator  Its worked for me

User · Answer

For my case in Windows 10 for postgresql 10 version  it worked by changing SERVER MODE to False in config distro py placed in web folder  as per these configuration settings  https   www pgadmin org docs pgadmin4 dev desktop deployment html   There are other settings mentioned in this answer  https   superuser com a 1131964  regarding python but I just changed SERVER MODE and it worked

User · Answer

Deleting the contents of C  Users  USERNAME  AppData Roaming pgAdmin directory worked for me

User · Answer

I need to add this here because I ve had several issues with this message  If you have recently upgraded to High Sierra you will find the latest  pgadmin 4 20  will keep appearing with the message  Application Server Could Not be Contacted   What this actually means on Macs is that python was unable to configure your environment in    pgadmin  This directory stores all the things you setup and configure and even logs of what was ran on your user copy usage of pgadmin   The way to fix this issue on High Sierra is down to sqlite3  If you look in that directory you ll see everything is stored in sqlite3 files   When version 4 20 of pgadmin was released it was shipped with a version later than sqlite3 19 and the problem arises because High Sierra is shipped with sqlite3 19  so to fix this issue  you need to replace the old version of sqlite3 with the latest on your packager   Now be aware  MacosX  all use sqlite to store details for the majority of apps on your mac  so you ll need to make sure you do not just wipe the old version but you ll have to have both versions co-existing together in harmony to avoid anything major occurring on your mac   1  download brew https   brew sh   2  update brew and upgrade brew to make sure it s up-to-date  3  brew install sqlite3  4  mv  usr bin sqlite3  usr bin sqlite3 os  5  ln -s  usr local Cellar sqlite 3 21 0 bin sqlite3  usr bin sqlite3  6   usr bin sqlite3 -version  check version is later than 3 19   You can now proceed to open up pgadmin as normal

User · Answer

As for me on windows 2012r2 it s start to work only after I reinstall pgAdmin 4 to folder c  pgAdmin4  With out spaces and any special chars  And all so I give full permission to this folder in NTFS

User · Answer

I had the same issue on the macosx and I renamed  pgadmin  in  users costa  to  pgadminx and I was able to start pgAdmin4

User · Answer

I use the cmd prompt on Windows 10 with psql postgres postgres    Then I launch pgAdmin4 and it works

User · Answer

In Windows Just go to this path and clear it   that works        C  Users  USERNAME  AppData Roaming pgAdmin

User · Answer

Deleting everything from this  C  Users YourUsernameOrAdmin AppData Roaming pgAdmin  folder helped me launching pgAdmin4 server again I am running pgAdmin4 v4 27 now  After I upgraded to pgAdmin4 v4 28 the problem started i e  the server was not starting  I tried many ways including changing the content type of  js to test javascript from text plain  it did not work  Finally deleting all contents from C  Users YourUsernameOrAdmin AppData Roaming pgAdmin helped me

User · Answer

try this I encountered the same problem and activated the setup file  it created a database  and was restarting again sudo  usr pgadmin4 bin setup-web sh

[postgresql] pgadmin4 : postgresql application server could not be contacted.

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