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NullPointer in PojoCache
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created by <a href="http://community.jboss.org/people/scottgj">Grzegorz Jamka</a> in <i>JBoss Cache</i> - <a href="http://community.jboss.org/message/635673#635673">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Versions:</p><p>JBossCache - 3.1.0.GA</p><p>PojoCache - 3.0.0.GA</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>During my endurance tests I get such exceptions</p><p>1) </p><p>org.jboss.cache.pojo.PojoCacheException: detach failed /parlayRa/TEST_NODES/18-12883</p><p>        at org.jboss.cache.pojo.impl.PojoCacheImpl.detach(PojoCacheImpl.java:134)</p><p>        at org.jboss.cache.pojo.impl.PojoCacheImpl.detach(PojoCacheImpl.java:221)</p><p>        at org.mobicents.slee.resource.parlay.util.replication.CacheBase.removeObject(CacheBase.java:74)</p><p>        at pl.ivmx.pojocache.cache.TestRemovePojoCache.remove_aroundBody0(TestRemovePojoCache.java:14)</p><p>        at pl.ivmx.pojocache.cache.TestRemovePojoCache.remove_aroundBody1$advice(TestRemovePojoCache.java:96)</p><p>        at pl.ivmx.pojocache.cache.TestRemovePojoCache.remove(TestRemovePojoCache.java:1)</p><p>        at pl.ivmx.pojocache.PeriodicCacheLoader.run(PeriodicCacheLoader.java:72)</p><p>        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)</p><p>        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)</p><p>        at java.util.concurrent.FutureTask.run(FutureTask.java:138)</p><p>        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)</p><p>        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)</p><p>        at java.lang.Thread.run(Thread.java:662)</p><p>Caused by: java.lang.NullPointerException</p><p>        at org.jboss.cache.pojo.impl.InternalHelper.cleanUp(InternalHelper.java:261)</p><p>        at org.jboss.cache.pojo.impl.PojoCacheDelegate.removeObject(PojoCacheDelegate.java:264)</p><p>        at org.jboss.cache.pojo.impl.PojoCacheImpl.detach(PojoCacheImpl.java:126)</p><p>        ... 12 more</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>2)</p><p>org.jboss.cache.pojo.PojoCacheException: detach failed /parlayRa/TEST_NODES/2-67790</p><p>        at org.jboss.cache.pojo.impl.PojoCacheImpl.detach(PojoCacheImpl.java:134)</p><p>        at org.jboss.cache.pojo.impl.PojoCacheImpl.detach(PojoCacheImpl.java:221)</p><p>        at org.mobicents.slee.resource.parlay.util.replication.CacheBase.removeObject(CacheBase.java:74)</p><p>        at pl.ivmx.pojocache.cache.TestRemovePojoCache.remove_aroundBody0(TestRemovePojoCache.java:14)</p><p>        at pl.ivmx.pojocache.cache.TestRemovePojoCache.remove_aroundBody1$advice(TestRemovePojoCache.java:96)</p><p>        at pl.ivmx.pojocache.cache.TestRemovePojoCache.remove(TestRemovePojoCache.java:1)</p><p>        at pl.ivmx.pojocache.PeriodicCacheLoader.run(PeriodicCacheLoader.java:72)</p><p>        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)</p><p>        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)</p><p>        at java.util.concurrent.FutureTask.run(FutureTask.java:138)</p><p>        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)</p><p>        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)</p><p>        at java.lang.Thread.run(Thread.java:662)</p><p>Caused by: java.lang.NullPointerException</p><p>        at org.jboss.cache.pojo.impl.InternalHelper.isMultipleReferenced(InternalHelper.java:180)</p><p>        at org.jboss.cache.pojo.impl.ObjectGraphHandler.isMultipleReferenced(ObjectGraphHandler.java:79)</p><p>        at org.jboss.cache.pojo.impl.PojoCacheDelegate.removeObject(PojoCacheDelegate.java:253)</p><p>        at org.jboss.cache.pojo.impl.PojoCacheImpl.detach(PojoCacheImpl.java:126)</p><p>        ... 12 more</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Does enybody know why?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>How to reporoduce error:</p><p>To start a test you have to:</p><p>1) Copy pojo cache configuration on two nodes (I have cluster comprised from two nodes in LAN)</p><p>1a) My JVM config (on both nodes):</p><p>JAVA_OPTS="-Xms1200m -Xmx1200m -XX:NewSize=150m -XX:MaxNewSize=150m -XX:MaxPermSize=128m -XX:SurvivorRatio=15 -XX:+UseTLAB -XX:TLABSize=64k -XX:+UseParNewGC -XX:+CMSParallelRemarkEnabled -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:MaxTenuringThreshold=32 -XX:CMSInitiatingOccupancyFraction=66"</p><p>1b) </p><p>2) Deploy web app on one of node</p><p>3) Go to web app web page</p><p><a class="jive-link-external-small" href="http://firstnode_ip:8080/pojocache-load-test/index" target="_blank">http://firstnode_ip:8080/pojocache-load-test/index</a></p><p>4) Choose section </p><h4 style="color: #000000; font-family: 'Times New Roman'; text-align: -webkit-auto; font-size: medium;">Test with all remove operations running constantly. </h4><p>and enter values:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><label style="color: #000000; font-family: 'Times New Roman'; text-align: -webkit-auto; font-size: medium;">Number of members per second:</label><span style="color: #000000; font-family: 'Times New Roman'; text-align: -webkit-auto; font-size: medium;"> 500</span></p><p><span style="color: #000000; font-family: 'Times New Roman'; text-align: -webkit-auto; font-size: medium;"><span style="color: #000000; font-family: 'Times New Roman'; text-align: -webkit-auto; font-size: medium;">Object live time in ms:</span> 180000</span></p><p><span style="color: #000000; font-family: 'Times New Roman'; text-align: -webkit-auto; font-size: medium;"><br/></span></p><p>and Run test.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Error should be shown after memory allocated on heap reachs its upper limit (from top totally allocated memory shows about 1.6GB)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Best regards,</p><p>Grzegorz Jamka</p></div>
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