"java.sql.SQLRecoverableException: Io exception: Connection reset" from Oracle JDBC driver in EAP

Solution Verified - Updated -


  • Red Hat JBoss Enterprise Application Platform (EAP)
    • All versions
  • Oracle DB


  • What does java.sql.SQLRecoverableException: Io exception: Connection reset from Oracle JDBC driver mean?
Caused by:  java.sql.SQLRecoverableException: Io exception: Connection reset
        at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:101)
        at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:133)
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:199)
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:263)
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:521)
        at oracle.jdbc.driver.T4CStatement.executeForDescribe(T4CStatement.java:791)
        at oracle.jdbc.driver.T4CStatement.executeMaybeDescribe(T4CStatement.java:855)
        at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1186)
        at oracle.jdbc.driver.OracleStatement.executeInternal(OracleStatement.java:1770)
        at oracle.jdbc.driver.OracleStatement.execute(OracleStatement.java:1739)
        at oracle.jdbc.driver.OracleStatementWrapper.execute(OracleStatementWrapper.java:299)

Caused by: org.hibernate.exception.JDBCConnectionException: Cannot open connection
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:97)
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:52)

Caused by: java.net.SocketException: Connection reset
    at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:96)
    at java.net.SocketOutputStream.write(SocketOutputStream.java:136)

  • Connection reset problem. User is getting connection reset exceptions error on the server.
The Error Code  is : SQL Error: 17002, SQLState: 08006
  • Connection Pool Setting problem. We are getting following error message on our application connecting to oracle DB:
Caused by: java.sql.SQLRecoverableException: Io exception: The Network Adapter could not establish the connection
Caused by: java.sql.SQLRecoverableException: Io exception: The Network Adapter could not establish the connection
oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:411) [:Oracle JDBC Driver version - ""]
oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:490) [:Oracle JDBC Driver version - ""]
oracle.jdbc.driver.T4CConnection.(T4CConnection.java:202) [:Oracle JDBC Driver version - ""]


  • The error does not originate with JBoss and may require investigation by:
    • Network administrators
    • Back-end server administrators/database administrators (e.g. Oracle admins)
  • Database connection validation/fault tolerance1 may allow JBoss to recover from the externally originating connection failure
  • The JBoss Idle timeout period may need to decrease to timeout connections more rapidly than the database server

Root Cause

  • This is a generic issue where the connection has been closed or terminated by something outside of the JBoss process.
  • This may be due to a firewall, switches on the network, protocol or other network errors, interruptions in network connectivity, etc.
  • The database server may be terminating the connection
    • The exception may relate to configuration (e.g. timeout period) of the Oracle database server
    • The exception may be due to error conditions in the database server
    • The exception may be due to a defect in the database server or driver

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