当我使用Hibernate池时,一切都很完美。但是,当我尝试将池更改为c3p0时,我没有从客户端获得任何错误(初始化c3p0没有错误)但我得到了#34;没有连接可能是是因为目标机器主动拒绝了它#34;与c3p0尝试进行的每个连接(在本例中为5)。
我在pgadmin III日志中看到此消息"服务器状态"
我完成了我的研究,没有任何作用。 我做了什么:
配置 - postgres
listen_addresses = '*' # what IP address(es) to listen on;
# comma-separated list of addresses;
# defaults to 'localhost'; use '*' for all
# (change requires restart)
port = 5432 # (change requires restart)
max_connections = 100 # (change requires restart)
配置 - pg_hba
# IPv4 local connections:
host all all 0.0.0.0/0 md5
# IPv6 local connections:
host all all ::1/128 md5
# Allow replication connections from localhost, by a user with the
# replication privilege.
#host replication postgres 127.0.0.1/32 md5
#host replication postgres ::1/128 md5
host all all 127.0.0.1/24 md5
Hibernate cfg:
<property name="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</property>
<property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
<property name="hibernate.connection.url">jdbc:postgresql://localhost:5432/{db_name}</property>
<property name="hibernate.c3p0.acquire_increment">1</property>
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="hibernate.c3p0.timeout">1000</property>
<property name="hibernate.c3p0.max_statements">50</property>
<property name="hibernate.c3p0.idle_test_period">1000</property>
重要的是:它确实以某种方式工作(在需要时建立单个连接)但似乎c3p0无法建立池服务器端