3 Replies Latest reply on May 16, 2007 10:03 AM by Manik Surtani

    NPE occuring in OptimisticNodeInterceptor in 1.4.1SP3

    Ben Temperton Newbie

      Hi There,

      I'm currently using JBossCache 1.4.1SP3, with Hibernate 3.2.2, using the following config files:

      treecache.xml:

      <server>
      
       <classpath codebase="./lib" archives="jboss-cache.jar, jgroups.jar"/>
      
      
       <!-- ==================================================================== -->
       <!-- Defines TreeCache configuration -->
       <!-- ==================================================================== -->
      
       <mbean code="org.jboss.cache.TreeCache"
       name="jboss.cache:service=TreeCache">
      
       <depends>jboss:service=Naming</depends>
       <depends>jboss:service=TransactionManager</depends>
      
       <!--
       Configure the TransactionManager : no matter since Hibernate will plug in
       an "adapter" to its own TransactionManagerLookup strategy here
       -->
       <attribute name="TransactionManagerLookupClass">org.jboss.cache.GenericTransactionManagerLookup</attribute>
      
      
       <!--
       Node locking scheme:
       OPTIMISTIC
       PESSIMISTIC (default)
       -->
       <attribute name="NodeLockingScheme">OPTIMISTIC</attribute>
      
       <!--
       Note that this attribute is IGNORED if your NodeLockingScheme above is OPTIMISTIC.
      
       Isolation level : SERIALIZABLE
       REPEATABLE_READ (default)
       READ_COMMITTED
       READ_UNCOMMITTED
       NONE
       -->
       <attribute name="IsolationLevel">REPEATABLE_READ</attribute>
      
       <!--
       Valid modes are LOCAL
       REPL_ASYNC
       REPL_SYNC
       INVALIDATION_ASYNC
       INVALIDATION_SYNC
      
       INVALIDATION_ASYNC is highly recommended as the mode for use
       with clustered second-level caches.
       -->
       <attribute name="CacheMode">REPL_ASYNC</attribute>
      
       <!--
       Just used for async repl: use a replication queue
       -->
       <attribute name="UseReplQueue">false</attribute>
      
       <!--
       Replication interval for replication queue (in ms)
       -->
       <attribute name="ReplQueueInterval">0</attribute>
      
       <!--
       Max number of elements which trigger replication
       -->
       <attribute name="ReplQueueMaxElements">0</attribute>
      
       <!-- Name of cluster. Needs to be the same for all clusters, in order
       to find each other
       -->
       <attribute name="ClusterName">TreeCache-Cluster</attribute>
      
       <!-- JGroups protocol stack properties. Can also be a URL,
       e.g. file:/home/bela/default.xml
       <attribute name="ClusterProperties"></attribute>
       -->
      
       <attribute name="ClusterConfig">
       <config>
       <!-- UDP: if you have a multihomed machine,
       set the bind_addr attribute to the appropriate NIC IP address -->
       <!-- UDP: On Windows machines, because of the media sense feature
       being broken with multicast (even after disabling media sense)
       set the loopback attribute to true -->
       <UDP mcast_addr="228.1.2.3" mcast_port="48866"
       ip_ttl="64" ip_mcast="true"
       mcast_send_buf_size="150000" mcast_recv_buf_size="80000"
       ucast_send_buf_size="150000" ucast_recv_buf_size="80000"
       loopback="false"/>
       <PING timeout="2000" num_initial_members="3"
       up_thread="false" down_thread="false"/>
       <MERGE2 min_interval="10000" max_interval="20000"/>
       <!-- <FD shun="true" up_thread="true" down_thread="true" />-->
       <FD_SOCK/>
       <VERIFY_SUSPECT timeout="1500"
       up_thread="false" down_thread="false"/>
       <pbcast.NAKACK gc_lag="50" retransmit_timeout="600,1200,2400,4800"
       max_xmit_size="8192" up_thread="false" down_thread="false"/>
       <UNICAST timeout="600,1200,2400" window_size="100" min_threshold="10"
       down_thread="false"/>
       <pbcast.STABLE desired_avg_gossip="20000"
       up_thread="false" down_thread="false"/>
       <FRAG frag_size="8192"
       down_thread="false" up_thread="false"/>
       <pbcast.GMS join_timeout="5000" join_retry_timeout="2000"
       shun="true" print_local_addr="true"/>
       <pbcast.STATE_TRANSFER up_thread="true" down_thread="true"/>
       </config>
       </attribute>
      
       <!--
       Whether or not to fetch state on joining a cluster
       NOTE this used to be called FetchStateOnStartup and has been renamed to be more descriptive.
       -->
       <attribute name="FetchInMemoryState">false</attribute>
      
       <!--
       Number of milliseconds to wait until all responses for a
       synchronous call have been received.
       -->
       <attribute name="SyncReplTimeout">20000</attribute>
      
       <!-- Max number of milliseconds to wait for a lock acquisition -->
       <attribute name="LockAcquisitionTimeout">15000</attribute>
      
      
       <!-- Name of the eviction policy class. -->
       <attribute name="EvictionPolicyClass"></attribute>
      
       <!--
       Indicate whether to use marshalling or not. Set this to true if you are running under a scoped
       class loader, e.g., inside an application server. Default is "false".
       -->
       <attribute name="UseMarshalling">false</attribute>
      
       </mbean>
      </server>
      


      hibernate.cfg.xml:

      <hibernate-configuration>
       <session-factory>
      
       <property name="xconfigKey">LOAD_TEST_HIBERNATE_DB_KEY</property>
      
       <property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>
       <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
       <property name="connection.url">jdbc:oracle:thin:@q-load-mgr.qxlva-dev.com:1521:LOADTEST</property>
       <property name="connection.username">loadtest</property>
       <property name="connection.password">password</property>
       <property name="hibernate.cache.use_query_cache">true</property>
      
       <!--JDBC connection pool (use the built-in) -->
       <!--<property name="connection.pool_size">1</property>-->
      
       <!-- configuration pool via c3p0-->
       <property name="c3p0.acquire_increment">1</property>
       <property name="c3p0.idle_test_period">100</property>
       <!-- seconds -->
       <property name="c3p0.max_size">10</property>
       <property name="c3p0.max_statements">200</property>
       <property name="c3p0.min_size">10</property>
       <property name="c3p0.timeout">1000</property>
      
      
       <!--property name="cache.provider_class">org.hibernate.cache.EhCacheProvider</property -->
       <property name="cache.provider_class">org.hibernate.cache.OptimisticTreeCacheProvider</property>
      
       <!-- JBoss Transactions Manager lookup class -->
       <property name="transaction.manager_lookup_class">com.qxlva.mm.dispensing.loadtest.transaction.JBossTSTransactionManagerLookup</property>
      
       <!-- Echo all executed SQL to stdout -->
       <property name="show_sql">false</property>
      
      
       <mapping resource="hbmfiles/ManagerDetails.hbm.xml"/>
       <mapping resource="hbmfiles/TestNugget.hbm.xml"/>
       <mapping resource="hbmfiles/Scenario.hbm.xml"/>
       <mapping resource="hbmfiles/PharmacyType.hbm.xml"/>
       <mapping resource="hbmfiles/ConnectedClient.hbm.xml"/>
       <mapping resource="hbmfiles/MessageTrace.hbm.xml"/>
       <mapping resource="hbmfiles/TimerCondition.hbm.xml"/>
       <mapping resource="hbmfiles/MessageCondition.hbm.xml"/>
       <mapping resource="hbmfiles/TestRun.hbm.xml"/>
       <mapping resource="hbmfiles/CertificateCredentials.hbm.xml"/>
       <mapping resource="hbmfiles/Pharmacy.hbm.xml"/>
       <mapping resource="hbmfiles/UserRegistration.hbm.xml"/>
       <mapping resource="hbmfiles/WorkUnit.hbm.xml"/>
       <mapping resource="hbmfiles/ScenarioInteraction.hbm.xml"/>
       <mapping resource="hbmfiles/Message.hbm.xml"/>
       <mapping resource="hbmfiles/Schedule.hbm.xml"/>
      
       <class-cache class="com.qxlva.mm.dispensing.loadtest.model.Pharmacy" usage="transactional"/>
       <class-cache class="com.qxlva.mm.dispensing.loadtest.model.PharmacyType" usage="transactional"/>
       <class-cache class="com.qxlva.mm.dispensing.loadtest.model.Scenario" usage="transactional"/>
       <class-cache class="com.qxlva.mm.dispensing.loadtest.model.ScenarioInteraction" usage="transactional"/>
      
       <class-cache class="com.qxlva.mm.dispensing.loadtest.model.CertificateCredentials" usage="transactional"/>
       <class-cache class="com.qxlva.mm.dispensing.loadtest.model.ManagerDetails" usage="transactional"/>
       <class-cache class="com.qxlva.mm.dispensing.loadtest.model.MessageTrace" usage="transactional"/>
       <class-cache class="com.qxlva.mm.dispensing.loadtest.model.MessageCondition" usage="transactional"/>
       <class-cache class="com.qxlva.mm.dispensing.loadtest.model.TimerCondition" usage="transactional"/>
       <class-cache class="com.qxlva.mm.dispensing.loadtest.model.TestNugget" usage="transactional"/>
       <class-cache class="com.qxlva.mm.dispensing.loadtest.model.Schedule" usage="transactional"/>
      
       <collection-cache collection="com.qxlva.mm.dispensing.loadtest.model.Pharmacy.messageMap"
       region="Pharmacy.messageMap" usage="transactional"/>
       <collection-cache collection="com.qxlva.mm.dispensing.loadtest.model.Pharmacy.completedMessageMap"
       region="Pharmacy.completedMessageMap" usage="transactional"/>
       <collection-cache collection="com.qxlva.mm.dispensing.loadtest.model.Pharmacy.scenarioInteractions"
       region="Pharmacy.scenarioInteractions" usage="transactional"/>
      
      
       <collection-cache collection="com.qxlva.mm.dispensing.loadtest.model.PharmacyType.messageLoadSchedule"
       region="PharmacyType.messageLoadSchedule" usage="transactional"/>
      
      
       <collection-cache collection="com.qxlva.mm.dispensing.loadtest.model.MessageTrace.conditions"
       region="MessageTrace.conditions" usage="transactional"/>
       <collection-cache collection="com.qxlva.mm.dispensing.loadtest.model.MessageTrace.messageTimings"
       region="MessageTrace.messageTimings" usage="transactional"/>
      
       <collection-cache collection="com.qxlva.mm.dispensing.loadtest.model.ScenarioInteraction.messageIds"
       region="ScenarioInteraction.messageIds" usage="transactional"/>
      
       <collection-cache collection="com.qxlva.mm.dispensing.loadtest.model.ManagerDetails.certificates"
       region="ManagerDetails.certificates" usage="transactional"/>
      
       <collection-cache collection="com.qxlva.mm.dispensing.loadtest.model.ManagerDetails.nuggets"
       region="ManagerDetails.nuggets" usage="transactional"/>
       <collection-cache collection="com.qxlva.mm.dispensing.loadtest.model.ManagerDetails.workUnits"
       region="ManagerDetails.workUnits" usage="transactional"/>
      
      
       <collection-cache collection="com.qxlva.mm.dispensing.loadtest.model.Schedule.scenarioList"
       region="Schedule.scenarioList" usage="transactional"/>
      
       <class-cache class="com.qxlva.mm.dispensing.loadtest.model.ConnectedClient" usage="transactional"/>
       <collection-cache collection="com.qxlva.mm.dispensing.loadtest.model.ManagerDetails.clientsConnected"
       region="ManagerDetails.clientsConnected" usage="transactional"/>
      
      
       </session-factory>
      </hibernate-configuration>


      I am using the JBossTSTransactionManagerLookup from the hbcache demo, which looks like this:

      public class JBossTSTransactionManagerLookup implements TransactionManagerLookup
      {
      
       public TransactionManager getTransactionManager(Properties properties) throws HibernateException
       {
       return com.arjuna.ats.jta.TransactionManager.transactionManager();
       }
      
       public String getUserTransactionName()
       {
       throw new UnsupportedOperationException();
       }
      }



      When I try to query the database, I get the following exception:

      ------------------------------------------------------
      GMS: address is 192.168.176.54:3315
      -------------------------------------------------------
      UpHandler (STATE_TRANSFER) 10:43:07,377 INFO TreeCache:4620 - viewAccepted(): [192.168.176.54:3315|0] [192.168.176.54:3315]
      main 10:43:07,392 INFO TreeCache:1325 - my local address is 192.168.176.54:3315
      main 10:43:07,986 WARN SessionFactoryImpl:994 - JTASessionContext being used with JDBCTransactionFactory; auto-flush will not operate correctly with getCurrentSession()
      main 10:43:08,455 WARN arjLoggerI18N:206 - [com.arjuna.ats.arjuna.coordinator.TxControl_1] - Name of XA node not defined. Using -3f574fca:cf8:462dd12c:1
      main 10:43:08,517 INFO arjLoggerI18N:185 - [com.arjuna.ats.arjuna.recovery.TransactionStatusManager_1] - Starting service com.arjuna.ats.arjuna.recovery.ActionStatusService on port 3320
      main 10:43:08,517 INFO arjLogger:185 - TransactionStatusManagerItem - host: 192.168.176.54 port: 3320
      main 10:43:08,533 INFO arjLoggerI18N:185 - [com.arjuna.ats.arjuna.recovery.TransactionStatusManager_3] - TransactionStatusManager started on port 3320 with service com.arjuna.ats.arjuna.recovery.ActionStatusService
      main 10:43:08,830 WARN TxInterceptor:332 - Rolling back, exception encountered
      java.lang.NullPointerException
       at org.jboss.cache.interceptors.OptimisticNodeInterceptor.invoke(OptimisticNodeInterceptor.java:68)
       at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:67)
       at org.jboss.cache.interceptors.OptimisticCreateIfNotExistsInterceptor.invoke(OptimisticCreateIfNotExistsInterceptor.java:68)
       at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:67)
       at org.jboss.cache.interceptors.OptimisticValidatorInterceptor.invoke(OptimisticValidatorInterceptor.java:76)
       at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:67)
       at org.jboss.cache.interceptors.OptimisticLockingInterceptor.invoke(OptimisticLockingInterceptor.java:116)
       at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:67)
       at org.jboss.cache.interceptors.OptimisticReplicationInterceptor.invoke(OptimisticReplicationInterceptor.java:137)
       at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:67)
       at org.jboss.cache.interceptors.TxInterceptor.handleNonTxMethod(TxInterceptor.java:321)
       at org.jboss.cache.interceptors.TxInterceptor.invoke(TxInterceptor.java:136)
       at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:67)
       at org.jboss.cache.interceptors.CacheMgmtInterceptor.invoke(CacheMgmtInterceptor.java:181)
       at org.jboss.cache.TreeCache.invokeMethod(TreeCache.java:4786)
       at org.jboss.cache.TreeCache.remove(TreeCache.java:3299)
       at org.jboss.cache.TreeCache.remove(TreeCache.java:2851)
       at org.hibernate.cache.OptimisticTreeCache.writeLoad(OptimisticTreeCache.java:76)
       at org.hibernate.cache.TransactionalCache.put(TransactionalCache.java:55)
       at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:156)
       at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:854)
       at org.hibernate.loader.Loader.doQuery(Loader.java:729)
       at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
       at org.hibernate.loader.Loader.doList(Loader.java:2220)
       at org.hibernate.loader.Loader.listUsingQueryCache(Loader.java:2136)
       at org.hibernate.loader.Loader.list(Loader.java:2096)
       at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:378)
       at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:338)
       at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)
       at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)
       at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
       at org.hibernate.impl.AbstractQueryImpl.uniqueResult(AbstractQueryImpl.java:811)
       at com.qxlva.mm.dispensing.loadtest.dao.ManagerDetailsDao.getManagerDetails(ManagerDetailsDao.java:78)
       at TestJBossCache.main(TestJBossCache.java:33)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at com.intellij.rt.execution.application.AppMain.main(AppMain.java:90)
      main 10:43:08,861 WARN TxInterceptor:332 - Rolling back, exception encountered


      Please advise as I can't find any reference to a similar problem in 1.4.1SP3 anywhere.

      Thanks,

      Ben

        • 1. Re: NPE occuring in OptimisticNodeInterceptor in 1.4.1SP3
          Ben Temperton Newbie

          Some new facts:

          1)Trying the BETA release of JBossCache results in the same error.

          2) If I try to persist an object with just strings and ints (i.e. no collections) then this configuration works. However, trying to persist an object with a collection is what is causing the error. The hbm file of the object I'm trying to persist is:

          <hibernate-mapping package="com.qxlva.mm.dispensing.loadtest.model">
          
           <class name="ManagerDetails" table="MANAGER_DETAILS" dynamic-update="true" dynamic-insert="true">
           <id name="iid" column="MANAGER_DETAILS_IID" type="long">
           <generator class="seqhilo">
           <param name="sequence">MANAGER_DETAILS_SEQUENCE</param>
           <param name="max_lo">10</param>
           </generator>
           </
           <property name="monitorChannelDetails" type="string" length="1000"/>
           <property name="testReady" type="boolean"/>
           <property name="testInitialised" type="boolean"/>
           <property name="testRunning" type="
           <set name="certificates" cascade="all-delete-orphan" lazy="false" outer-join="false">
           <key column="MANAGER_DETAILS_IID"/>
           <one-to-many class="com.qxlva.mm.dispensing.loadtest.model.CertificateCredentials"/>
           </
           </class>
          
          </hibernate-mapping>


          and the object that hangs off it contains no collections:

          <hibernate-mapping package="com.qxlva.mm.dispensing.loadtest.model">
           <class name="CertificateCredentials" table="CERTIFICATE_CREDENTIALS" lazy="false">
           <id name="iid" type="long" column="CERTIFICATE_CREDENTIALS_IID">
           <generator class="seqhilo">
           <param name="sequence">CERT_CRED_SEQUENCE</param>
           <param name="max_lo">5000</param>
           </generator>
           </id>
           <property name="filename" type="string" column="FILENAME"/>
           <property name="keystoreType" type="string" column="KEYSTORE_TYPE"/>
           <property name="password" type="string" column="PASSWORD"/>
           <property name="username" type="string" column="USERNAME"/>
           <property name="inUse" type="boolean" column="IN_USE"/>
           <property name="ssoToken" type="string" column="SSO_TOKEN"/>
           <property name="ssoTokenExpiryTime" type="org.joda.time.contrib.hibernate.PersistentDateTime"
           column="SSO_TOKEN_EXPIRY_TIME"/>
           </class>
          
          </hibernate-mapping>


          As I say, I can successfully persist a CertificateCredential with thie treecache.xml and hibernate.cfg.xml files supplied. However as soon as I try to persist a ManagerDetails which has a collection of CertificateCredentials, the NPE is thrown.



          • 2. Re: NPE occuring in OptimisticNodeInterceptor in 1.4.1SP3
            Ben Temperton Newbie

            I should also point out that if I try to persist a ManagerDetails with the collection details commented out in the hbm file and the cfg.xml file, the object is also successfully persisted.

            • 3. Re: NPE occuring in OptimisticNodeInterceptor in 1.4.1SP3
              Manik Surtani Master

              Does this only happen with the JBossTS manager? Have you tried this with other TMs?