I am not able to connect to postgresql server. The connection was working fine till yesterday, but since today morning I am having this issue. I installed postgres using homebrew, and have already uninstalled and reinstalled it. Below is the screenshot from pgAdmin 4:
I am not able to find postgresql.conf and pg_hba.conf as multiple solutions suggested to change listen_addresses. I see that postgresql is installed, this is the location: /opt/homebrew/Cellar/postgresql#14. I have tried solutions from:
How can I start PostgreSQL server on Mac OS X?
but almost for all commands I am getting the error:
WARNING: The locate database (/var/db/locate.database) does not exist.
To create the database, run the following command:
sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.locate.plist
Please be aware that the database can take some time to generate; once
the database has been created, this message will no longer appear.
If I try to change the location in command(https://stackoverflow.com/questions/7975556/how-can-i-start-postgresql-server-on-mac-os-x#:~:text=I%20start%20the-,PostgreSQL,-server%3F) to start the server, I get the error: pg_ctl: directory "/opt/homebrew/postgres_db_cluster" does not exist.
The worst part is that it was working all good till yesterday.
Any help is appreciated.
Edit 1: As suggested in comments , I followed the steps from https://wiki.postgresql.org/wiki/Homebrew, but still getting the error.
Step 1: brew services restart postgresql#14
==> Successfully stopped postgresql#14 (label: homebrew.mxcl.postgresql#14)
==> Successfully started postgresql#14 (label: homebrew.mxcl.postgresql#14)
Step 2: psql postgrespsql: error: connection to server on socket "/tmp/.s.PGSQL.5432" failed: No such file or directory
Is the server running locally and accepting connections on that socket?
Edit 2:
I tried the first step from this solution: https://stackoverflow.com/questions/7975556/how-can-i-start-postgresql-server-on-mac-os-x?rq=1#:~:text=on%20port%205432%3F-,Update,-3%3A
below is the result:
abhinash.kumar# ~ % pg_ctl -D /usr/local/var/postgres status
pg_ctl: directory "/usr/local/var/postgres" is not a database cluster directory.
also, the link mentions a file pg_hba.conf.sample, but I cannot find that in my system.
Edit 3: Starting postgres server using homebrew
abhinash.kumar# ~ % brew services start postgresql#14
Bootstrap failed: 5: Input/output error
Try re-running the command as root for richer errors.
Error: Failure while executing; `/bin/launchctl bootstrap gui/501 /Users/abhinash.kumar/Library/LaunchAgents/homebrew.mxcl.postgresql#14.plist` exited with 5.
continues to throw errors.
Thanks to https://stackoverflow.com/users/7070613/adrian-klaver, the problem is now fixed.
I uninstalled postgres, and reinstalled using homebrew. In addition, I ran this command:
initdb -D /usr/local/var/postgres/.
and this fixed the issue, and I am able to create the db connection using pgAdmin 4.
running brew services start mongodb-community which yields:
Bootstrap failed: 5: Input/output error
Error: Failure while executing; `/bin/launchctl bootstrap gui/501 /Users/<myUserName>/Library/LaunchAgents/homebrew.mxcl.mongodb-community.plist` exited with 5.
when I run launchctl load -w /Users/<myUserName>/Library/LaunchAgents/homebrew.mxcl.mongodb-community.plist
yields
Load failed: 5: Input/output error
I recently upgraded macOs to BigSur 11.5.2.
Ive uninstall and reinstalled homebrew and xcode.
try this
brew services restart <mongodb-community#4.4>
I am able to run mongodb through homebrew. I believe this solved my issue:
launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.mongodb-community.plist
followed by
launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mongodb-community.plist
I saw this issue with MySQL and the solution was my current profile was not the owner of my homebrew folder.
I had to change it because I have a second profile set up for another work space, but they share the same homebrew path.
I would suggest anyone who sees this error try running
sudo chown -R $(whoami) $(brew --prefix)/*
And then seeing if that will resolve it. Again I didn't have this issue with MongoDB, but I saw this exact error with MySQL when my profile didn't own the brew folder.
Try this if you tried to restart your service, but it still doesn't work
stop your service
brew services stop mongodb-community
restart your macOS
start your service again
brew services start mongodb-community
To see the real errors, you need to run the service without brew
I had a similar problem, but instead of mongodb, I could not start apache(httpd).
$ brew services start httpd
Bootstrap failed: 5: Input/output error
Try re-running the command as root for richer errors.
Error: Failure while executing; `/bin/launchctl bootstrap gui/501
/Users/john/Library/LaunchAgents/homebrew.mxcl.httpd.plist` exited with
5.
FAIL: 1
Unfortunately brew doesn't show the user what causes this error. At first I tried to use the tips from the answers in this thread, but neither reinstalling apache nor unload -w/load -w helped.
I also found nothing in the brew logs. I decided to investigate apache itself. To do this I ran apache without brew:
$ /opt/homebrew/Cellar/httpd/2.4.51/bin/apachectl start
httpd: Syntax error on line 66 of /opt/homebrew/etc/httpd/httpd.conf: Cannot load /opt/homebrew/Cellar/php#5.6/5.6.40_3/lib/httpd/modules/libphp5.so into server: dlopen(/opt/homebrew/Cellar/php#5.6/5.6.40_3/lib/httpd/modules/libphp5.so, 0x000A): tried: '/opt/homebrew/Cellar/php#5.6/5.6.40_3/lib/httpd/modules/libphp5.so' (no such file), '/usr/local/lib/libphp5.so' (no such file), '/usr/lib/libphp5.so' (no such file)
FAIL: 1
Then it was finally clear what was the reason why httpd service was not starting. It turned out that after the php upgrade, the php version had changed and I forgot to write the new php version in the apache configuration file.
I quickly fixed this and apache started up.
It seems that the mongodb-community is already started. So do restart it instead of starting, by the following command:
brew services restart mongodb-community
I faced a similar problem with postgresql 11 and restarting the service did not help. The issue arose when my MacBook restarted abruptly.
After checking the ports and trying out all the possible solutions, I decided to look into the logs.
tail -n 100 /usr/local/var/log/postgresql#11.log
This gave me the last 100 lines of the log where I found this:
FATAL: lock file "postmaster.pid" already exists
HINT: Is another postmaster (PID 479) running in data directory "/usr/local/var/postgresql#11"?
Clearly, the issue was with postmaster.pid so I deleted it:
rm /usr/local/var/postgresql#11/postmaster.pid
Started the postgres service again:
brew services start postgresql#11
and voila! It worked.
I had similar error in regard to postgres.
$ brew services start postgresql
Bootstrap failed: 5: Input/output error
Error: Failure while executing; `/bin/launchctl bootstrap gui/501 /Users/yrk/Library/LaunchAgents/homebrew.mxcl.postgresql.plist` exited with 5.
I've tried restart and it looked promising:
$ brew services restart postgres
Stopping `postgresql`... (might take a while)
==> Successfully stopped `postgresql` (label: homebrew.mxcl.postgresql)
==> Successfully started `postgresql` (label: homebrew.mxcl.postgresql)
But there still was a problem when trying to connect:
$ psql -d postgres -U apiuser
psql: error: connection to server on socket "/tmp/.s.PGSQL.5432" failed: No such file or directory
Is the server running locally and accepting connections on that socket?
Checking postgres log as mentioned by #mansoor.khan helped, in my case it was:
tail /usr/local/var/log/postgres.log.
And the issue was clear:
$ tail /usr/local/var/log/postgres.log
2022-05-19 14:18:46.029 CEST [32374] FATAL: database files are incompatible with server
2022-05-19 14:18:46.029 CEST [32374] DETAIL: The data directory was initialized by PostgreSQL version 13, which is not compatible with this version 14.3.
2022-05-19 14:18:56.071 CEST [32676] FATAL: database files are incompatible with server
2022-05-19 14:18:56.071 CEST [32676] DETAIL: The data directory was initialized by PostgreSQL version 13, which is not compatible with this version 14.3.
2022-05-19 14:19:06.111 CEST [32885] FATAL: database files are incompatible with server
2022-05-19 14:19:06.111 CEST [32885] DETAIL: The data directory was initialized by PostgreSQL version 13, which is not compatible with this version 14.3.
2022-05-19 14:19:16.128 CEST [33102] FATAL: database files are incompatible with server
2022-05-19 14:19:16.128 CEST [33102] DETAIL: The data directory was initialized by PostgreSQL version 13, which is not compatible with this version 14.3.
2022-05-19 14:19:26.166 CEST [33434] FATAL: database files are incompatible with server
2022-05-19 14:19:26.166 CEST [33434] DETAIL: The data directory was initialized by PostgreSQL version 13, which is not compatible with this version 14.3.
Now the problem is: how to revert to previous version or upgrade old data to new version of postgres DB, but this is for another topic.
run something like launchctl remove homebrew.mxcl.mongodb-community before the load command solved my problem
I had this when upgrading from 4.4 to 5.0 and I suspect it’s similar for you. Lets assume you were upgrading 5.x to 6.x then the resolution would be ...
check your mongo log, e.g.
vi /usr/local/var/log/mongodb/mongo.log
Look for any errors relating to file/directory permissions and fix those, e.g. though I’m not quite sure whether ‘wheel’ or ‘admin’ is right.
sudo chown yourloginname:wheel thedirectory/*
Roll back to your previous working version of mongo (e.g. 5.x)
Start Mongo 5
Start a Mongo Shell and type
db.adminCommand( { setFeatureCompatibilityVersion: "5.0" } )
Check the logs to verify the database has detected 5.0
Uninstall 5.x
Re-install 6.x
Restart / start 6.x
It should now work?
In my case, another httpd process was running on the Mac. Killed with monitor tool allowed me to start httpd.
I had a similar problem on mysql.
Error: Failure while executing; `/bin/launchctl bootstrap gui/501 /Users/gerd/Library/LaunchAgents/homebrew.mxcl.mysql.plist` exited with 5.
In my case the mysqld miss the osx network connection permission. After restart OSX it appear the network permissions dialog. I granted the permission to msqld and the problem was fixed!
Happened with redis. Realized there was a bind setting in the config, binding the server to an incorrect ip address.
I faced the same problem. This commands helped me
brew uninstall rabbitmq
brew uninstall erlang
brew install rabbitmq
brew services restart rabbitmq
You may run into this if the service is already running, but as another user.
For example, you may have run sudo brew services start example and are now running brew services info example. It tells you it's not running and you think "hm, it should be running" and enter brew services start example.
Potentially example is already bound to, say, port 7777 and now you ask for another program to be bound to the same port, leading to a failing service start.
In short: If you are binding to a port, check if the same service is already running as another user and bound to the same port.
I'm trying to run psql on my Vagrant machine, but I get this error:
psql: could not connect to server: No such file or directory
Is the server running locally and accepting connections on
Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
Note: Vagrant 1.9.2
Box: ubuntu/trusty64, https://atlas.hashicorp.com/ubuntu/boxes/trusty64
EDIT
Commands I've used in order to install and run postgres:
sudo apt-get update
sudo apt-get install postgresql
sudo su postgres
psql -d postgres -U postgres
I've had this same issue, related to the configuration of my pg_hba.conf file (located in /etc/postgresql/9.6/main). Please note that 9.6 is the postgresql version I am using.
The error itself is related to a misconfiguration of postgresql, which causes the server to crash before it starts.
I would suggest following these instructions:
Certify that postgresql service is running, using sudo service postgresql start
Run pg_lsclusters from your terminal
Check what is the cluster you are running, the output should be something like:
Version - Cluster Port Status Owner Data directory
9.6 ------- main -- 5432 online postgres /var/lib/postgresql/9.6/main
Disregard the '---' signs, as they are being used there only for alignment.
The important information are the version and the cluster. You can also check whether the server is running or not in the status column.
Copy the info from the version and the cluster, and use like so:
pg_ctlcluster <version> <cluster> start, so in my case, using version 9.6 and cluster 'main', it would be pg_ctlcluster 9.6 main start
If something is wrong, then postgresql will generate a log, that can be accessed on /var/log/postgresql/postgresql-<version>-main.log, so in my case, the full command would be sudo nano /var/log/postgresql/postgresql-9.6-main.log.
The output should show what is the error.
2017-07-13 16:53:04 BRT [32176-1] LOG: invalid authentication method "all"
2017-07-13 16:53:04 BRT [32176-2] CONTEXT: line 90 of configuration file "/etc/postgresql/9.5/main/pg_hba.conf"
2017-07-13 16:53:04 BRT [32176-3] FATAL: could not load pg_hba.conf
Fix the errors and restart postgresql service through sudo service postgresql restart and it should be fine.
I have searched a lot to find this, credit goes to this post.
Best of luck!
I had the same issue but non of the answers here helped.
How I fixed it (mac)
Try to start postgresql with pg_ctl -D /usr/local/var/postgres start
Look for the Error Message that says something like FATAL: could not open directory "pg_tblspc": No such file or directory.
Create that missing directory mkdir /usr/local/var/postgres/pg_tblspc
Repeat from step one until you created all missing directories
When done and then trying to start postgresql again it might say FATAL: lock file "postmaster.pid" already exists
Delete postmaster.pid: rm /usr/local/var/postgres/postmaster.pid
Start postgres with: pg_ctl -D /usr/local/var/postgres start
Done ✨
These two steps solved it for me on Mac:
rm /usr/local/var/postgres/postmaster.pid
brew services restart postgresql
For M1 Macs:
rm /opt/homebrew/var/postgres/postmaster.pid
brew services restart postgresql
In case you face this issue (reported by #luckyguy73): psql: FATAL: database "postgresql" does not exist
You can run
brew postgresql-upgrade-database
to fix it.
I am just posting this for anyone who is feeling lost and hopeless as I did when I found this question. It seems that sometimes by editing some psotgresql-related config files, one can accidentally change the permissions of the file:
Note how pg_hba.conf belongs to root, and users cannot even read it. This causes postgres to not be able to open this file and therefore not be able to start the server, throwing the error seen in the original question.
By running
sudo chmod +r pg_hba.conf
I was able to make this file once again accessible to the postgres user and then after running
sudo service postgresql start
Was able to get the server running again.
WARNING: This will remove the database
Use command:
rm -rf /usr/local/var/postgres && initdb /usr/local/var/postgres -E utf8
WARNING: This will remove the database
Within zsh:
rm -rf /usr/local/var/postgres && initdb /usr/local/var/postgres -E utf8
This is the only thing that worked for me after countless hours trouble shooting.
Does the /etc/postgresql/9.6/main/postgresql.conf show that port being assigned? On my default Xubuntu Linux install, mine showed port = 5433 for some reason as best as I can remember, but I did comment out the line in that same file that said listen_addresses = 'localhost' and uncommented the line listen_addresses = '*'. So maybe start and check there. Hope that helps.
This works for me:
pg_ctl -D /usr/local/var/postgresql#9.6 stop;
brew services stop postgresql#9.6;
brew services start postgresql#9.6;
I was able to solve the issue by running:
sudo systemctl start postgresql#9.5-main
In my case Postgres was managed through Homebrew Services (i.e. started via brew services start postgresql#10 Terminal command for the Postgres 10 that I use), and for that setup I had to discover a couple of essential steps to do before I could apply any advice in this thread. So I want to share just that piece as it may help someone who has the same setup.
NOTE: all the commands below are to be run in Terminal.
To give a quick background: After upgrading to macOS Big Sur I discovered that Postgres wasn't working and running psql results in the error mentioned in the original question above. I tried to start Postgres (via the brew services start postgresql#10 command), this resulted in a message Service postgresql#10 already started. If I tried to restart it (via the brew services restart postgresql#10) I got a message that it was stopped and then started successfully. But! This was a misleading message, and I spent quite some time searching for config issues etc. before discovering that the service was not started successfully in reality.
So, the way to investigate this is:
Make sure the service is started by running the brew services start postgresql#10 (the latter argument may be different depending on what your Homebrew package name is e.g. postgresql#12 or plain postgresql).
Run brew services list. This is the command that gives you the true state of the service. In my case it said that Postgres' status is error:
Name Status User Plist
postgresql#10 error Denis /Users/Denis/Library/LaunchAgents/homebrew.mxcl.postgresql#10.plist
redis started Denis /Users/Denis/Library/LaunchAgents/homebrew.mxcl.redis.plist
To investigate further open the config shown in the same command output in Plist column (I used nano /Users/Denis/Library/LaunchAgents/homebrew.mxcl.postgresql#10.plist to check it).
In the config look for the StandardErrorPath key, and open the file located in the value of that key, i.e. in the <string> tag following the key. In my case it was /usr/local/var/log/postgresql#10.log.
Open that log and check the latest error (I used nano /usr/local/var/log/postgresql#10.log and then Alt+/ to go to the end of the file).
Voila. That is the real error to investigate, which you can then look for in the previous answers or google for. I'm not covering the rest here, as the goal of this answer is to show how to find the real error if you use Homebrew Services to run Postgres. (In my case it was the lock file "postmaster.pid" already exists already covered in the previous answers, plus the path to check right in the error message, in my case /usr/local/var/postgresql#10).
In my case it was the lockfile postmaster.id that was not deleted properly during the last system crash that caused the issue. Deleting it with sudo rm /usr/local/var/postgres/postmaster.pid and restarting Postgres solved the problem.
I recommend you should clarify port that postgres.
In my case I didn't know which port postgres was running on.
lsof -i | grep 'post'
then you can know which port is listening.
psql -U postgres -p "port_in_use"
with port option, might be answer. you can use psql.
If non of the above answers are not working for you, then please try this one,
Many people have mentioned many solutions to this problem! But all of them forgot that, the same problem will arise when your disk don't have enough space or the space you are assigned for postgres is full
Check your system storage, if its full free up some space! then restart your postgres by sudo service postgresql restart or do a stop and start sudo service posgresql stop then sudo service postgresql start
This will solve the issue, it solved for me
I occasionally have the same issue but mostly after macOS upgrades. Shutting down and migrating to the new version usually fixes it for me(make changes according to your version). So first upgrade your postgresql
brew services stop postgresql#12
brew services start postgresql#12
brew postgresql-upgrade-database
This is mostly a temporary fix but since I couldn't find a better solution this works for me.
Update: If the issue says that another postmaster is running then try removing it from that location(your postmaster.pid location will be displayed to you)
rm /usr/local/var/postgres/postmaster.pid
Open your database manager and execute this script
update pg_database set datallowconn = 'true' where datname = 'your_database_name';
I had the same error when I create the SQL db in a VM. I had changed the default value of /etc/postgresql/9.3/main/postgresql.conf shared_buffers = 200MB to 75% of my total RAM. Well, I forgot to actually allocate that RAM in the VM. When I gave the command to make a new database, I received the same error.
Powered off, gave the baby its bottle (RAM) and presto, it worked.
The same thing happened to me as I had changed something in the /etc/hosts file. After changing it back to 127.0.0.1 localhost it worked for me.
just reinstall your pgsql with direct version sudo apt-get install postgresql-9.5 (u must remove the package before install new one)
I had similar problems just a while ago. After trying more than 5 suggestions I decided to go back to the basics and start from the beginning. Which meant removing my postgresql installation and following this guide upon re-installing postgresql. https://help.ubuntu.com/lts/serverguide/postgresql.html
Ubuntu 20
This Problem happened to me, as ubuntu pre-installed version of Postgresql-9.6 server was always down and after trying all the above answers it didn't start.
Solution:
I installed another version of Postgresql which is postgresql-13, using this command: sudo apt install postgresql it will install the latest version of postgresql.
I see if the server is online or down using this command: pg_lsclusters if the new version of postgresql is online, we will proceed to remove the old version of postgresql.
we will see all packages that are installed related to postgresql, using this command: dpkg -l | grep postgresql
Remove the old version, which is here postgresql-9.6. Using this command:
sudo apt-get --purge remove postgresql-9.6 postgresql-client-9.6 replace 9.6 with your old version number. Final remaining packages related to the latest Version 13:
Restart your postgresql latest version server, which is here postgresql-13. Using this command: sudo systemctl restart postgresql#13-main replace 13 in the command with your latest version number.
Now, if you try psql command you will get an error related to your user, as in the image:
To Remove the above error, The installation procedure created a user account called postgres that is associated with the default Postgres role, to switch over to the postgres account use this command: sudo -u postgres psql this command will log you into the interactive Postgres session. You can also set your password for this user using this command \password postgres.
Then change the Port to the deafult port of postgresql, which is 5432 as all application will try to connect to postgresql using this port by default, using this command: sudo nano /etc/postgresql/13/main/postgresql.conf, it will open postgresql configuration file, then search for port and change it to 5432. After that you need to restart the server using this command sudo systemctl restart postgresql#13-main. Note, Replace 13 in the command with your latest version.
If you want to create your own User/Role, use this command: sudo -u postgres createuser --interactive. The script will prompt you with some choices, as in the image and based on your responses, it will execute the correct Postgres commands to create a user to your specifications.
Tutorial: For more information on postgresql related commands
I couldn't connect using the psql command and kept getting the error Cannot connect to Server: No such file or directory.
Step 1: Check the status of the Postgres cluster
$ pg_lsclusters
Step 2: Restart the Postgres cluster
$ sudo pg_ctlcluster 12 main start
Make sure to replace 12 with your version of Postgres
Step 3: Check again and connect
$ pg_lsclusters
$ sudo -i -u postgres
$ psql
I got this error when I restored my database from last pg_basebackup backup file. After that when I tried to connect database(psql), I was getting the same error. The error was resolved, when I updated pg_hba.conf file and wherever "peer" authentication was there I replaced that with "md5" and then restarted postgres services. After that, the problem was resolved.
This error happened to me after my mac mini got un-plugged (so forced shutdown), and all I had to do to fix it was restart
I have the same issue with postgres 11 on my mac. I get this error every time after restart
psql: could not connect to server: No such file or directory
Is the server running locally and accepting connections on
Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
As a temporary fix I do
brew services stop postgresql#11
brew services start postgresql#11
My problem happened after a brew update so I've ran
pg_ctl -D /usr/local/var/postgres start
and I've got this result:
FATAL: database files are incompatible with server 2021-07-07 13:27:21.692 CEST [70896] DETAIL: The data directory was initialized by PostgreSQL version 12, which is not compatible with this version 13.2. stopped waiting
I've ran
brew postgresql-upgrade-database
FATAL: could not load server certificate file "/etc/ssl/certs/ssl-cert-snakeoil.pem": No such file or directory
LOG: database system is shut down
pg_ctl: could not start server
I have a missing ssl-cert-snakeoil.pem file so i created it using make-ssl-cert generate-default-snakeoil --force-overwrite And it worked fine.
In my case, I had to run journalctl -xe, and it showed that my disk was full. I then deleted some .gz items from /var/log and I could again restart the postgresql.
I'm on Kali Linux. I had to remove the brew version of postgresql with
brew uninstall postgresql
sudo -u postgres psql got me into root postgres
Simply running these commands from the installation steps in the official PostgreSQL docs worked for me (I'm on Fedora 33):
# Optionally initialize the database and enable automatic start:
sudo /usr/pgsql-13/bin/postgresql-13-setup initdb
sudo systemctl enable postgresql-13
sudo systemctl start postgresql-13
RHEL Installation link
kali users pls do this
sudo service postgresql restart