问题
I am having the same exact issue as (playframework 2.0 - exceeded max_user_connections on database evolutions?) only this time it is with a local postgres install. I have a sample application I threw up on hub @ http://git.io/CdEntA.
I attempt to run it locally, using
sbt stage
target/start -DapplyEvolutions.default=true -Ddb.default.driver=org.postgresql.Driver - Ddb.default.url="jdbc:postgresql://localhost:5432/test?user=myuser"
When I launch http://localhost:9000, all I see on the console is...
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection Sleeping for 1000ms and trying again. Attempts left: 10. Exception: null [error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection Sleeping for 1000ms and trying again. Attempts left: 10. Exception: null [info] play - Application started (Prod) [info] play - Listening for HTTP on port 9000... [error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection Sleeping for 1000ms and trying again. Attempts left: 9. Exception: null [error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection Sleeping for 1000ms and trying again. Attempts left: 8. Exception: null [error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection Sleeping for 1000ms and trying again. Attempts left: 7. Exception: null [error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection Sleeping for 1000ms and trying again. Attempts left: 6. Exception: null [error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection Sleeping for 1000ms and trying again. Attempts left: 5. Exception: null [error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection Sleeping for 1000ms and trying again. Attempts left: 4. Exception: null [error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection Sleeping for 1000ms and trying again. Attempts left: 3. Exception: null [error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection Sleeping for 1000ms and trying again. Attempts left: 2. Exception: null [error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection Sleeping for 1000ms and trying again. Attempts left: 1. Exception: null [error] c.j.b.PoolWatchThread - Error in trying to obtain a connection. Retrying in 1000ms org.postgresql.util.PSQLException: FATAL: sorry, too many clients already at org.postgresql.core.v3.ConnectionFactoryImpl.doAuthentication(ConnectionFactoryImpl.java:293) ~[postgresql-9.1-901-1.jdbc4.jar:na]
When I take a peek into the database, I see all connections are in fact used up by the process.
Any help with be greatly appreciated.
Thanks.
回答1:
I believe your problem is that you are not overriding the db.default.user config parameter so it's using the sa value. Just comment out the following line in your conf/application.conf file:
db.default.user=sa
Once I did that and re-ran sbt stage then it worked fine for me.
回答2:
Try reducing the numbers of connections used by your play app.
Here is a configuration that only uses 5 connections.
db.default.partitionCount=1
db.default.maxConnectionsPerPartition=5
db.default.minConnectionsPerPartition=5
Basically the number of connections will be partitionCount x ConnectionsPerPartition
来源：https://stackoverflow.com/questions/10303333/playframework-2-0-exceeded-max-user-connections-on-database-evolutions-with-l