I got the following error

INFO: WARN JDBCExceptionReporter:77 - SQL Error: 0, SQLState: null
INFO: ERROR JDBCExceptionReporter:78 - Error in allocating a connection. Cause: In-use connections equal max-pool-size and expired max-wait-time. Cannot allocate more connections.
SEVERE: null
org.hibernate.exception.GenericJDBCException: Cannot open connection
at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:426)
at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:119)
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:57)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1326)
at tcplistener.Alldatabase.checkimei(Alldatabase.java:64)
at tcplistener.ModuleHandler.run(ModuleHandler.java:88)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.sql.SQLException: Error in allocating a connection. Cause: In-use connections equal max-pool-size and expired max-wait-time. Cannot allocate more connections.
at com.sun.gjc.spi.base.DataSource.getConnection(DataSource.java:133)
at org.hibernate.connection.DatasourceConnectionProvider.getConnection(DatasourceConnectionProvider.java:66)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:423)
... 7 more


How to solve this one,

please help me

thanks in advance