java.sql.SQLException: Connections could not be acquired from the underlying database!

exmobi.cn | 4 months ago
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    C3p0 Connections could not be acquired from the underlying database

    Stack Overflow | 10 months ago | Grace
    org.springframework.jdbc.UncategorizedSQLException: Hibernate operation: Cannot open connection; uncategorized SQLException for SQL [???]; SQL state [null]; error code [0]; Connections could not be acquired from the underlying database!; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
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    Crash log when submitting many jobs to the grid

    GitHub | 4 years ago | georgebyelas
    java.sql.SQLException: Connections could not be acquired from the underlying database!
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    java.sql.SQLException: Connections could not be acquired from the underlying database!
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    org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Could not open connection

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Root Cause Analysis

  1. com.mchange.v2.resourcepool.CannotAcquireResourceException

    A ResourcePool could not acquire a resource from its primary factory or source.

    at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable()
  2. c3p0:JDBC DataSources/Resource Pools
    AbstractPoolBackedDataSource.getConnection
    1. com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1418)
    2. com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:606)
    3. com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:526)
    4. com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:755)
    5. com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:682)
    6. com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118)
    7. com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:689)
    8. com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140)
    8 frames
  3. com.fiberhome.bcs
    App.getConnection
    1. com.fiberhome.bcs.appmanager.appmanage.bean.App.getConnection(App.java:554)
    1 frame