8:58 p.m.
I'm experiencing errors with Keycloak connected to an Oracle database. It was working
fine and we didn't notice the errors until after upgrading to 2.2.1.
The errors:
2016-10-26 11:35:19,502 WARN [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (Timer-3)
SQL Error: 17008, SQLState: 08003
2016-10-26 11:35:19,503 ERROR [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (Timer-3)
Closed Connection
2016-10-26 11:35:19,504 ERROR [org.keycloak.services] (Timer-3) KC-SERVICES0089: Failed to
run scheduled task ClearExpiredEvents: javax.persistence.PersistenceException:
org.hibernate.exception.JDBCConnectionException: could not prepare statement
at
org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1692)
at
org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1602)
at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:492)
at org.keycloak.models.jpa.JpaRealmProvider.getRealms(JpaRealmProvider.java:99)
at
org.keycloak.models.cache.infinispan.RealmCacheSession.getRealms(RealmCacheSession.java:424)
at
org.keycloak.services.scheduled.ClearExpiredEvents.run(ClearExpiredEvents.java:34)
at
org.keycloak.services.scheduled.ClusterAwareScheduledTaskRunner$1.call(ClusterAwareScheduledTaskRunner.java:53)
at
org.keycloak.services.scheduled.ClusterAwareScheduledTaskRunner$1.call(ClusterAwareScheduledTaskRunner.java:49)
at
org.keycloak.cluster.infinispan.InfinispanClusterProvider.executeIfNotExecuted(InfinispanClusterProvider.java:90)
at
org.keycloak.services.scheduled.ClusterAwareScheduledTaskRunner.runTask(ClusterAwareScheduledTaskRunner.java:49)
at
org.keycloak.services.scheduled.ScheduledTaskRunner.run(ScheduledTaskRunner.java:44)
at org.keycloak.timer.basic.BasicTimerProvider$1.run(BasicTimerProvider.java:51)
at java.util.TimerThread.mainLoop(Timer.java:555)
at java.util.TimerThread.run(Timer.java:505)
Caused by: org.hibernate.exception.JDBCConnectionException: could not prepare statement
at
org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:115)
at
org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)
at
org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:109)
at
org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:182)
at
org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:148)
at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1928)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1897)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1875)
at org.hibernate.loader.Loader.doQuery(Loader.java:919)
at
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:336)
at org.hibernate.loader.Loader.doList(Loader.java:2611)
at org.hibernate.loader.Loader.doList(Loader.java:2594)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2423)
at org.hibernate.loader.Loader.list(Loader.java:2418)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:501)
at
org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:371)
at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:216)
at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1326)
at org.hibernate.internal.QueryImpl.list(QueryImpl.java:87)
at org.hibernate.jpa.internal.QueryImpl.list(QueryImpl.java:606)
at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:483)
... 11 more
Caused by: java.sql.SQLRecoverableException: Closed Connection
at
oracle.jdbc.driver.PhysicalConnection.prepareStatement(PhysicalConnection.java:3587)
at
org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnection.doPrepareStatement(BaseWrapperManagedConnection.java:778)
at
org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnection.prepareStatement(BaseWrapperManagedConnection.java:764)
at
org.jboss.jca.adapters.jdbc.WrappedConnection.prepareStatement(WrappedConnection.java:454)
at
org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:146)
at
org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:172)
... 28 more
Here's the datasource config:
<datasource jndi-name="java:jboss/datasources/KeycloakDS"
pool-name="KeycloakDS" enabled="true"
use-java-context="true">
<connection-url>jdbc:oracle:thin:@dbserver:1550:instance</connection-url>
<driver>oracle</driver>
<pool>
<min-pool-size>5</min-pool-size>
<max-pool-size>200</max-pool-size>
<prefill>true</prefill>
</pool>
<security>
<user-name>KEYCLOAK</user-name>
<password> </password>
</security>
<validation>
<background-validation>true</background-validation>
<check-valid-connection-sql>select 1 from
dual</check-valid-connection-sql>
</validation>
</datasource>
The H2 datasource is still in the standalone-ha.xml as is the h2 driver but they've
never been used or modified.
As I said, this has been working perfectly but suddenly appears to be closing connections
despite having the automatic validation turned on. This only happens with the production
environment and experiences no issues in the DEV environment that has the same config
except for being connected to a different DB server. The DBAs are seeing only 5
connections in this environment but more in DEV.
Any help would be appreciated.
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