<div dir="ltr">Do you have any reference to the bug in WildFly?<div><br></div><div>We upgraded to WildFly 10 a long time ago in 1.8.1.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 21 July 2016 at 14:34, Edgar Vonk - Info.nl <span dir="ltr"><<a href="mailto:Edgar@info.nl" target="_blank">Edgar@info.nl</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">We also recently had an issue where Keycloak stopped working because it could no longer get any (Oracle) DB connections from the connection pool. This was not after a restart but just during normal operation.<br>
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We had configured the DB connection pool to use background-validation and this has worked fine until recently.<br>
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As mentioned in <a href="http://stackoverflow.com/questions/28707650/wildfly-and-auto-reconnect-to-the-database" rel="noreferrer" target="_blank">http://stackoverflow.com/questions/28707650/wildfly-and-auto-reconnect-to-the-database</a> (linked from: <a href="https://issues.jboss.org/browse/KEYCLOAK-3204" rel="noreferrer" target="_blank">https://issues.jboss.org/browse/KEYCLOAK-3204</a>) the issue seems to be that starting from Wildfly 10 (?) this background validation no longer works due to a bug in Wildfly. As suggested there we have now configured the connection pool with validate-on-match set to true and we hope this will resolve the issue.<br>
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We only started to see this issue after upgrading to Keycloak 2.0.0 and I think that is where Wildfly was upgraded to version 10? Or maybe it was just bad luck..<br>
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The stack trace we had:<br>
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<br>
Caused by: java.sql.SQLException: javax.resource.ResourceException: IJ000453: Unable to get managed connection for java:jboss/datasources/KeycloakDS<br>
at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:146)<br>
at org.jboss.as.connector.subsystems.datasources.WildFlyDataSource.getConnection(WildFlyDataSource.java:66)<br>
at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122)<br>
at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:386)<br>
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:87)<br>
... 71 more<br>
Caused by: javax.resource.ResourceException: IJ000453: Unable to get managed connection for java:jboss/datasources/KeycloakDS<br>
at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.getManagedConnection(AbstractConnectionManager.java:656)<br>
at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:429)<br>
at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:747)<br>
at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:138)<br>
... 75 more<br>
Caused by: javax.resource.ResourceException: IJ000655: No managed connections available within configured blocking timeout (30000 [ms])<br>
at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreConcurrentLinkedDequeManagedConnectionPool.getConnection(SemaphoreConcurrentLinkedDequeManagedConnectionPool.java:564)<br>
at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getSimpleConnection(AbstractPool.java:626)<br>
at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getConnection(AbstractPool.java:598)<br>
at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.getManagedConnection(AbstractConnectionManager.java:590)<br>
... 78 more<br>
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