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POConnect to a Read Only database
 

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    <p>While trying to connect to a database that's set to read only, the connection cannot be made. I get the following error:</p> <pre><code>Cannot create PoolableConnectionFactory (Io exception: The Network Adapter could not establish the connection) </code></pre> <p>The application needs to run in read-write mode and then automatically handle the switch to read-only by only checking the isReadOnly property of the connection object. The application runs correctly when connecting to a read-write database, but fails when I change to the connection string below (with security information removed). I've verified that the connection string is correct, so the problem doesn't lie there.</p> <pre><code>ca.businesssolutions.nbs.jdbc.connect=jdbc:oracle:thin:unicorn_read_only/password@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=hostname)(PORT=9999)))(CONNECT_DATA=(SID=SBSBTST)(SERVER=DEDICATED))) </code></pre> <p>I'm having trouble trying to figure out where to start looking. I inherited the application and am not sure if it's a spring framework limitation or another setting I'm missing.</p> <p>The spring configuration for the datasource is:</p> <pre><code>&lt;bean id="dataSource" class="ca.businesssolutions.nbs.server.base.datasource.MyBasicDataSource" destroy-method="close"&gt; &lt;!--url and driver class name are set through Configuratoin object.--&gt; &lt;property name="initialSize" value="10"/&gt; &lt;property name="maxActive" value="-1"/&gt; &lt;property name="validationQuery" value="SELECT 1 FROM DUAL"/&gt; &lt;property name="accessToUnderlyingConnectionAllowed" value="true"/&gt; &lt;/bean&gt; </code></pre> <p>The Data Source constructor:</p> <pre><code>public MyBasicDataSource() { super(); setUrl(Configuration.get(Configuration.CONNECT)); setDriverClassName(Configuration.get(Configuration.DRIVER_NAME)); //The initial number of connections that are created when the pool is started. int numConnections = 10; try { numConnections = Integer.parseInt(Configuration.get(Configuration.NUMBER_OF_CONNECTIONS)); } catch (Exception exception) { // Do nothing. } setInitialSize(numConnections); //The maximum number of active connections that can be allocated from this pool at the same time, or non-positive for no limit. setMaxActive(-1); setValidationQuery("SELECT 1 FROM DUAL"); setAccessToUnderlyingConnectionAllowed(true); DataAccessObject.setDataSource(this); } </code></pre> <p>What else would help?</p>
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