jdbc error

Not applicable

jdbc error

Web application is generating following error frequently:

com.ncr.teradata.jdbc_4.util.JDBCException: [NCR] [Teradata JDBC Driver] : HY000 206 : Failed to submit request - Connection is already closed

Retrying this again in application does not give any error. Is there any possibility that connection pooling thread is closed by the database or by the application?