Out of memory heap

[janbols]

Hi,
I'm testing a setup of 2 gridgain nodes sharing a jbossCache that's used to store certain messages. When I run both nodes on the same JVM I notice the memory heap soon reaches it's limit.

I tried analysing it with a profiler and found that the org.jgroups.stack.NakReceiverWindow was holding 90% of the available memory.

Do you have any ideas what I'm doing wrong?

You can find the configuration of the jBossCache below.

<?xml version="1.0" encoding="UTF-8"?>

<server>
 <mbean code="org.jboss.cache.jmx.CacheJmxWrapper" name="jboss.cache:service=Cache">

 <attribute name="TransactionManagerLookupClass">org.jboss.cache.transaction.GenericTransactionManagerLookup
 </attribute>

 <attribute name="IsolationLevel">REPEATABLE_READ</attribute>

 <attribute name="LockParentForChildInsertRemove">true</attribute>

 <attribute name="CacheMode">REPL_ASYNC</attribute>

 <attribute name="ClusterName">JBossCache-Cluster-TMS-NG</attribute>
 <attribute name="ClusterConfig">
 <config>

 <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"/>
 <MERGE2 min_interval="10000" max_interval="20000"/>
 <FD shun="true"/>
 <FD_SOCK/>
 <VERIFY_SUSPECT timeout="1500"/>
 <pbcast.NAKACK gc_lag="50" retransmit_timeout="600,1200,2400,4800"/>
 <UNICAST timeout="600,1200,2400,4800"/>
 <pbcast.STABLE desired_avg_gossip="400000"/>
 <FC max_credits="2000000" min_threshold="0.10"/>
 <FRAG2 frag_size="8192"/>
 <pbcast.GMS join_timeout="5000" shun="true" print_local_addr="true"/>
 <pbcast.STATE_TRANSFER/>
 </config>
 </attribute>

 <attribute name="StateRetrievalTimeout">20000</attribute>

 <attribute name="SyncReplTimeout">20000</attribute>

 <attribute name="LockAcquisitionTimeout">15000</attribute>

 <attribute name="ShutdownHookBehavior">DEFAULT</attribute>

 <attribute name="UseLazyDeserialization">true</attribute>

 </mbean>
</server>

I'm using jBossCache 2.2.0.GA


I'm completely new to jBossCache or jGroups. Obviuosly.

[belaban]

Where did you copy the XML config ? The value of STABLE.desired_avg_gossip is completely off, a value of 400000 means you're garbage collecting every 400 seconds !
I suggest a value of 50000 (every 50 seconds), but combine it with max_bytes="400000". You probably mixed the 2 properties up.

[janbols]

Hi, thanks for the reply. I found the

<pbcast.STABLE desired_avg_gossip="400000"/>

in the userguide of jbossCache.

I tried changing the values like you suggested, but that didn't change a thing. Any other ideas?

[belaban]

No, it's max_bytes *not* desired_avg_gossip !

Try one of the standard configs shipped with your version, e.g. udp.xml

[janbols]

Great! Yes! That did the trick.
Thanks