org.hibernate.exception.GenericJDBCException: Cannot open connection

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    java.sql.SQLException: Connections could not be acquired from the underlying database!
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    Errors on registration form (at least on demo server), and a complaint about age fields - Bahmni - OpenMRS Talk

    openmrs.org | 2 months ago
    java.sql.SQLException: com.mchange.v2.c3p0.PoolBackedDataSource@1ab98872 [ connectionPoolDataSource -> com.mchange.v2.c3p0.WrapperConnectionPoolDataSource@e191ff92 [ acquireIncrement -> 1, acquireRetryAttempts -> 5, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, debugUnreturnedConnectionStackTraces -> false, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, identityToken -> z8kflt9e1cbgr851egmeji|3be8e520, idleConnectionTestPeriod -> 3000, initialPoolSize -> 0, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 100, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 50, maxStatements -> 0, maxStatementsPerConnection -> 0, minPoolSize -> 0, nestedDataSource -> com.mchange.v2.c3p0.DriverManagerDataSource@2dd31de5 [ description -> null, driverClass -> null, factoryClassLocation -> null, identityToken -> z8kflt9e1cbgr851egmeji|56ae095d, jdbcUrl -> jdbc:mysql://localhost:3306/openmrs?autoReconnect=true&sessionVariables=storage_engine=InnoDB&useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull, properties -> {user=******, password=******, release_mode=after_transaction} ], preferredTestQuery -> null, propertyCycle -> 0, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, usesTraditionalReflectiveProxies -> false; userOverrides: {} ], dataSourceName -> null, factoryClassLocation -> null, identityToken -> z8kflt9e1cbgr851egmeji|371ab69a, numHelperThreads -> 3 ] has been closed() -- you can no longer use it.

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Root Cause Analysis

  1. java.sql.SQLException

    Connections could not be acquired from the underlying database!

    at com.mchange.v2.sql.SqlUtils.toSQLException()
  2. c3p0:JDBC DataSources/Resource Pools
    AbstractPoolBackedDataSource.getConnection
    1. com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:106)
    2. com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:529)
    3. com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128)
    3 frames
  3. Hibernate
    C3P0ConnectionProvider.getConnection
    1. org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:56)
    1 frame
  4. Hibernate
    ConnectionManager.openConnection
    1. org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:423)
    1 frame