java.sql.SQLException: Error in allocating a connection. Cause: Connection could not be allocated because: Communications link failure Last packet sent to the server was 0 ms ago.

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    javax.jbi.messaging.MessagingException: Error occured while executing sql.Reason: Error in allocating a connection. Cause: In-use connections equal max-pool-size and expired max-wait-time. Cannot allocate more connections. SQLState: null ErrorCode: 0
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    Root Cause Analysis

    1. java.sql.SQLException

      Error in allocating a connection. Cause: Connection could not be allocated because: Communications link failure Last packet sent to the server was 0 ms ago.

      at com.sun.gjc.spi.base.DataSource.getConnection()
    2. Embedded GlassFish Web
      DataSource.getConnection
      1. com.sun.gjc.spi.base.DataSource.getConnection(DataSource.java:115)
      1 frame