10:12 a.m.
Hi,
We were using JBoss Cache 1.2.3 in our web application run on Tomcat server. Recently we
decided to upgrade to JBoss Cache 1.4.1.
For this the following changes were made.
-- Added jboss-cache-jdk50.jar (instead of jboss-cache.jar)
-- jboss-aop-jdk50.jar (instead of jboss-aop.jar)
-- jboss-serialization.jar
The following is the configuration xml used.
<?xml version="1.0" encoding="UTF-8" ?>
| <server>
|
| <!-- ====================================================================
-->
| <!-- Defines TreeCache configuration
-->
| <!-- ====================================================================
-->
| <!--
| <mbean code="org.jboss.cache.aop.TreeCacheAop"
| name="jboss.cache:service=TreeCacheAop"> -->
| <mbean code="org.jboss.cache.aop.PojoCache"
| name="jboss.cache:service=PojoCache">
| <depends>jboss:service=TransactionManager</depends>
| <!-- Configure the TransactionManager -->
| <attribute
name="TransactionManagerLookupClass">org.jboss.cache.DummyTransactionManagerLookup</attribute>
|
| <!--
| Node locking scheme :
| PESSIMISTIC (default)
| OPTIMISTIC
| -->
| <attribute name="NodeLockingScheme">OPTIMISTIC</attribute>
|
| <!--
| Node locking isolation level :
| SERIALIZABLE
| REPEATABLE_READ (default)
| READ_COMMITTED
| READ_UNCOMMITTED
| NONE
|
| (ignored if NodeLockingScheme is OPTIMISTIC)
| -->
| <attribute
name="IsolationLevel">REPEATABLE_READ</attribute>
|
| <!-- Lock parent before doing node additions/removes
| Only for PESSIMISTIC Locking-->
| <attribute
name="LockParentForChildInsertRemove">true</attribute>
|
| <!-- Valid modes are LOCAL
| REPL_ASYNC
| REPL_SYNC
| INVALIDATION_ASYNC
| INVALIDATION_SYNC
| -->
| <attribute name="CacheMode">LOCAL</attribute>
|
| <!-- Whether each interceptor should have an mbean
| registered to capture and display its statistics. -->
| <attribute name="UseInterceptorMbeans">true</attribute>
|
| <!-- Name of cluster. Needs to be the same for all TreeCache nodes in a
| cluster, in order to find each other -->
| <attribute
name="ClusterName">JBoss-Cache-Cluster</attribute>
|
| <!-- Uncomment next three statements to enable JGroups multiplexer.
| This configuration is dependent on the JGroups multiplexer being
| registered in an MBean server such as JBossAS. -->
| <!--
| <depends>jgroups.mux:name=Multiplexer</depends>
| <attribute
name="MultiplexerService">jgroups.mux:name=Multiplexer</attribute>
| <attribute name="MultiplexerStack">udp</attribute>
| -->
|
| <!-- JGroups protocol stack properties. ClusterConfig isn't used if the
| multiplexer is enabled and successfully initialized. -->
| <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="45566"
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" />
| <VERIFY_SUSPECT timeout="1500" up_thread="false"
down_thread="false" />
| <pbcast.NAKACK gc_lag="50" max_xmit_size="8192"
retransmit_timeout="600,1200,2400,4800" 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="false"
down_thread="false" />
| </config>
| </attribute>
|
| <!-- The max amount of time (in milliseconds) we wait until the
| initial state (ie. the contents of the cache) are retrieved from
| existing members in a clustered environment
| -->
| <attribute
name="InitialStateRetrievalTimeout">5000</attribute>
|
| <!-- Number of milliseconds to wait until all responses for a
| synchronous call have been received.
| -->
| <attribute name="SyncReplTimeout">10000</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">org.jboss.cache.eviction.LRUPolicy</attribute>
-->
| <attribute
name="EvictionPolicyClass">org.jboss.cache.eviction.AopEvictionPolicy</attribute>
| <!-- Specific eviction policy configurations. This is LRU -->
| <attribute name="EvictionPolicyConfig">
| <config>
| <attribute name="wakeUpIntervalSeconds">1</attribute>
| <region name="/_default_">
| <attribute name="maxNodes">0</attribute>
| <attribute name="timeToLiveSeconds">300</attribute>
| <!-- Maximum time an object is kept in cache regardless of idle time
-->
| <attribute name="maxAgeSeconds">300</attribute>
| </region>
|
| <region name="/rgn/procedure/">
| <attribute name="maxNodes">0</attribute> <!-- No limit
-->
| <attribute name="timeToLiveSeconds">300</attribute>
| <!-- Maximum time an object is kept in cache regardless of idle time -->
| <attribute name="maxAgeSeconds">300</attribute>
| </region>
| </config>
|
| </attribute>
|
| </mbean>
| </server>.
|
|
On trying to put an object into cache we are getting the following nullpointer exception.
Exception in thread "Thread-38" java.lang.NullPointerException
at org.jboss.cache.TreeCache.invokeMethod(TreeCache.java:5863)
at org.jboss.cache.TreeCache.put(TreeCache.java:3833)
at org.jboss.cache.aop.PojoCache.lockPojo(PojoCache.java:635)
at org.jboss.cache.aop.PojoCache.putObject(PojoCache.java:461)
at com.rgn.cache.Cache.putObject(Cache.java:67)
at com.rgn.dao.NewMediaDao.procedure(NewMediaDao.java:428)
at com.rgn.dao.NewMediaDao.run(NewMediaDao.java:166)
at java.lang.Thread.run(Thread.java:595)
Can anyone shed some light on what we are doing wrong here.
Thanks and Regards,
Rahul
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