[CONJ-186] NPE during (quick?) init of JDBC driver/pool from JBoss Created: 2015-08-25  Updated: 2016-04-29  Resolved: 2016-04-29

Status: Closed
Project: MariaDB Connector/J
Component/s: Other
Affects Version/s: 1.2.0, 1.3.0, 1.2.2, 1.2.3, 1.3.2, 1.3.1, 1.3.3
Fix Version/s: 1.3.4

Type: Bug Priority: Critical
Reporter: Richard Strate Assignee: Diego Dupin
Resolution: Fixed Votes: 0
Labels: None
Environment:

CentOS 6.7, JBoss AS 5 (Managed connections)


 Description   

Sometimes when we do loads tests on our application (cold started) we receive an NPE from the JDBC driver (trace below).

Application runs in JBoss AS5 (5.1.0GA) and MariaDB DS is configured as Local Tx Datasource with failover active.

Just restarting the load test seems to fix the problem. Possibly this could be a "cold-start-initial config-race-condition"?

Stack trace

 
2015-08-25 11:05:03,568 WARN  [org.jboss.resource.connectionmanager.JBossManagedConnectionPool] (pool-33-thread-1) Throwable while attempting to get a new connection: null
 
org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (java.lang.NullPointerException)
 
        at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.getLocalManagedConnection(LocalManagedConnectionFactory.java:225)
 
        at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:195)
 
        at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.createConnectionEventListener(InternalManagedConnectionPool.java:633)
 
        at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:267)
 
        at org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BasePool.getConnection(JBossManagedConnectionPool.java:679)
 
        at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:404)
 
        at org.jboss.resource.connectionmanager.TxConnectionManager.getManagedConnection(TxConnectionManager.java:381)
 
        at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:496)
 
        at org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConnection(BaseConnectionManager2.java:941)
 
        at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:89)
 
        at org.hibernate.connection.DatasourceConnectionProvider.getConnection(DatasourceConnectionProvider.java:92)
 
        at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)
 
        at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167)
 
        at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:161)
 
        at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1573)
 
        at org.hibernate.loader.Loader.doQuery(Loader.java:696)
 
        at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
 
        at org.hibernate.loader.Loader.doList(Loader.java:2228)
 
        at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2125)
 
        at org.hibernate.loader.Loader.list(Loader.java:2120)
 
        at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:401)
 
        at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:361)
 
        at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196)
 
        at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1148)
 
        at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102)
 
        at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:67)
 
        at syrei.tas2.auth.domain.jpa.JpaAuthenticationQuintupletDao.findByImsi(JpaAuthenticationQuintupletDao.java:64)
 
        at com.syrei.tas2.auth.hlr.av.HlrAuthVectorSbb.requestVector(HlrAuthVectorSbb.java:125)
 
        at com.syrei.tas2.auth.hlr.av.HlrAuthVectorSbb.requestVector(HlrAuthVectorSbb.java:90)
 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
 
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 
        at java.lang.reflect.Method.invoke(Method.java:606)
 
        at org.mobicents.slee.container.deployment.interceptors.SbbLocalObjectInterceptor.invokeAndReturnObject(SbbLocalObjectInterceptor.java:95)
 
        at org.mobicents.slee.container.deployment.interceptors.SbbLocalObjectInterceptor.invokeAndReturnvoid(SbbLocalObjectInterceptor.java:154)
 
        at com.syrei.tas2.auth.hlr.av.HlrAuthVectorSbbLocalObjectImpl.requestVector(HlrAuthVectorSbbLocalObjectImpl.java)
 
        at com.syrei.tas2.auth.hlr.HlrAuthorizationSbb.requestVectorsFromHlr(HlrAuthorizationSbb.java:193)
 
        at com.syrei.tas2.auth.hlr.HlrAuthorizationSbb.challenge(HlrAuthorizationSbb.java:162)
 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
 
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 
        at java.lang.reflect.Method.invoke(Method.java:606)
 
        at org.mobicents.slee.container.deployment.interceptors.SbbLocalObjectInterceptor.invokeAndReturnObject(SbbLocalObjectInterceptor.java:95)
 
        at org.mobicents.slee.container.deployment.interceptors.SbbLocalObjectInterceptor.invokeAndReturnvoid(SbbLocalObjectInterceptor.java:154)
 
        at com.syrei.tas2.auth.hlr.HlrAuthorizationSbbLocalObjectImpl.challenge(HlrAuthorizationSbbLocalObjectImpl.java)
 
        at com.syrei.tas2.auth.AuthorizationSbb.onAuthenticationRequestEvent(AuthorizationSbb.java:155)
 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
 
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 
        at java.lang.reflect.Method.invoke(Method.java:606)
 
        at org.mobicents.slee.runtime.sbbentity.SbbEntityImpl.invokeEventHandler(SbbEntityImpl.java:479)
 
        at org.mobicents.slee.runtime.eventrouter.routingtask.EventRoutingTaskImpl.routeQueuedEvent(EventRoutingTaskImpl.java:379)
 
        at org.mobicents.slee.runtime.eventrouter.routingtask.EventRoutingTaskImpl.run(EventRoutingTaskImpl.java:126)
 
        at org.mobicents.slee.runtime.eventrouter.EventRouterExecutorImpl$EventRoutingTaskStatsCollector.run(EventRouterExecutorImpl.java:76)
 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
 
        at java.lang.Thread.run(Thread.java:745)
 
Caused by: java.lang.NullPointerException
 
        at org.mariadb.jdbc.internal.mysql.listener.AbstractMastersListener.resetOldsBlackListHosts(AbstractMastersListener.java:146)
 
        at org.mariadb.jdbc.internal.mysql.listener.impl.MastersFailoverListener.reconnectFailedConnection(MastersFailoverListener.java:176)
 
        at org.mariadb.jdbc.internal.mysql.listener.impl.MastersFailoverListener.initializeConnection(MastersFailoverListener.java:85)
 
        at org.mariadb.jdbc.internal.mysql.FailoverProxy.<init>(FailoverProxy.java:86)
 
        at org.mariadb.jdbc.internal.common.Utils.retrieveProxy(Utils.java:535)
 
        at org.mariadb.jdbc.Driver.connect(Driver.java:102)
 
        at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.getLocalManagedConnection(LocalManagedConnectionFactory.java:207)
 
        ... 56 more



 Comments   
Comment by Diego Dupin [ 2016-04-29 ]

There was a possible race condition corrected in commit https://github.com/MariaDB/mariadb-connector-j/commit/06494a70aa0ed8a56c933473712ae5e36c774971#diff-5aef88ef4562a4e2747738830898d3ba
correction released in 1.3.4.

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