2:44 a.m.
our Cluster has two physical servers, cache mode is set as invalidation and async
application is deployed on websphere 6.1 and windows XP and jboss cache 3
below is the Java code
method (){
| System.out.println("Cluster members:"+cache.getMembers());
| Object obj = cache.get(Fqn.fromString("/a"),"b");
| if (obj == null) {
| cache.put(Fqn.fromString("/a"),"b", "testdata");
| }
|
|
| }
Below are steps to reproduce my issue, it caused cache invalidated loop, how to control
avoid the cache invalidated loop?
appreciate for your help!
Step 1
start server 1
and then start server 2 after 1 minutes
Step 2:
call method on server 1
below is the debug information in server 1 cache lisetner:
node /a created;
node /a modified;
step 3:
call method on server 2
Server Console print: Cluster members:[10.111.35.76:3918, 10.111.35.58:3525]
below is the debug information in server 2 cache lisetner:
node /a created;
node /a modified;
below is the debug information in server 1 cache lisetner:
node /a invalidated
Step 4:
call method on server 1
Server Console print: Cluster members:[10.111.35.76:3918, 10.111.35.58:3525]
below is the debug information in server 1 cache lisetner:
node /a created;
node /a modified;
below is the debug information in server 2 cache lisetner:
node /a invalidated
Step 5:
call method on server 2
Server Console print: Cluster members:[10.111.35.76:3918, 10.111.35.58:3525]
below is the debug information in server 2 cache lisetner:
node /a created;
node /a modified;
below is the debug information in server 1 cache lisetner:
node /a invalidated
......
This is cache configuration xml:
<?xml version="1.0" encoding="UTF-8"?>
|
| <jbosscache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="urn:jboss:jbosscache-core:config:3.0">
| <!--
| Used to enable invocation batching and allow the use of
Cache.startBatch()/endBatch() methods.
| -->
| <invocationBatching
| enabled="true"/>
|
| <!--
| Used to register JMX statistics in any available MBean server
| -->
| <jmxStatistics
| enabled="false"/>
| <!-- Configure the TransactionManager -->
| <transaction
transactionManagerLookupClass="org.jboss.cache.transaction.GenericTransactionManagerLookup"/>
|
| <clustering mode="invalidation">
| <!--
| timeout: The max amount of time (in milliseconds) we wait until the
| state (i.e. the contents of the cache) are retrieved from
| existing members in a clustered environment
| -->
| <stateRetrieval timeout="20000"/>
|
| <!-- JGroups protocol stack properties. -->
| <jgroupsConfig>
| <UDP discard_incompatible_packets="true"
enable_bundling="true" enable_diagnostics="false"
ip_ttl="2"
| loopback="false" max_bundle_size="64000"
max_bundle_timeout="30" mcast_addr="228.10.10.10"
| mcast_port="45588" mcast_recv_buf_size="100000000"
mcast_send_buf_size="640000"
| oob_thread_pool.enabled="true"
oob_thread_pool.keep_alive_time="10000"
oob_thread_pool.max_threads="20"
| oob_thread_pool.min_threads="8"
oob_thread_pool.queue_enabled="false"
oob_thread_pool.queue_max_size="10"
| oob_thread_pool.rejection_policy="Run"
thread_naming_pattern="pl" thread_pool.enabled="true"
| thread_pool.keep_alive_time="10000"
thread_pool.max_threads="15" thread_pool.min_threads="8"
| thread_pool.queue_enabled="true"
thread_pool.queue_max_size="100000"
| thread_pool.rejection_policy="Discard"
| tos="8" ucast_recv_buf_size="20000000"
ucast_send_buf_size="640000" use_concurrent_stack="true"
| use_incoming_packet_handler="true"/>
| <PING num_initial_members="3" timeout="2000"/>
| <MERGE2 max_interval="30000"
min_interval="10000"/>
| <FD_SOCK/>
| <FD max_tries="5" shun="true"
timeout="10000"/>
| <VERIFY_SUSPECT timeout="1500"/>
| <pbcast.NAKACK discard_delivered_msgs="true"
gc_lag="0" retransmit_timeout="300,600,1200,2400,4800"
| use_mcast_xmit="true"/>
| <UNICAST timeout="300,600,1200,2400,3600"/>
| <pbcast.STABLE desired_avg_gossip="50000"
max_bytes="400000" stability_delay="1000"/>
| <pbcast.GMS join_timeout="5000"
print_local_addr="true" shun="false"
view_ack_collection_timeout="5000"
| view_bundling="true"/>
| <FC max_credits="500000" min_threshold="0.2"/>
| <FRAG2 frag_size="60000"/>
| <pbcast.STREAMING_STATE_TRANSFER/>
| <pbcast.FLUSH timeout="0"/>
| </jgroupsConfig>
|
| <async />
| <!-- Alternatively, to use sync replication, comment out the element above
and uncomment the element below. -->
| <!-- <sync /> -->
|
| </clustering>
|
|
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