tomcat服務器在跑的時候報下面這個錯，重啟tomcat服務器后又恢復了正常，請問這個是什么原因？
[org.logicalcobwebs.proxool.proxoolPool - sweep] - Prototype
org.postgresql.util.PSQLException: The connection attempt failed.
at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:292)
資料庫連接池如下：
proxool.house-keeping-sleep-time=60000
proxool.simultaneous-build-throttle=20
proxool.maximum-new-connections=20
proxool.prototype-count=5
proxool.maximum-connection-count=400
proxool.minimum-connection-count=10
proxool.house-keeping-test-sql=select CURRENT_DATE from dual
proxool.maximum-active-time=30000
proxool.maximum-connection-lifetime=1200000
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標籤：PostgreSQL
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