[jboss-user] [JBossCache] - IdentityLock timeouts occuring after 0 ms and no locks?
We have a jboss cluster with a Hibernate 2nd level cache via JBossCache. I'm
receiving a lot of the following type of error and I'm unsure how to approach
resolving it. It seems like the write lock times out instantly, but there aren't any
existing locks:
[IdentityLock] write lock for ... could not be acquired after 0 ms. Locks: Read lock
owners: [] Write lock owner: null (caller=Thread[http-0.0.0.0-8443-30], lock info:
(org.jboss.cache.lock.LockStrategyReadCommitted@75fae343))
JBoss version is 4.0.5 GA, JGroups & JBossCache are the versions that shipped with
it.
I have included our cache configuration file in case anything can be seen as obviously
wrong therein:
<?xml version="1.0" encoding="UTF-8"?>
jboss:service=Naming
jboss:service=TransactionManager
Hibernate-${jboss.partition.name:Cluster}
READ_COMMITTED
REPL_ASYNC
false
false
org.jboss.cache.BatchModeTransactionManagerLookup
<UDP mcast_addr="${partition.udpgroup.hib3:228.1.2.3}"
mcast_port="${partition.udpport.hib3:48866}"
ucast_recv_buf_size="20000000"
ucast_send_buf_size="640000"
mcast_recv_buf_size="25000000"
mcast_send_buf_size="640000"
loopback="false"
max_bundle_size="64000"
max_bundle_timeout="30"
use_incoming_packet_handler="true"
use_outgoing_packet_handler="true"
ip_ttl="${jgroups.mcast.ip_ttl:2}"
enable_bundling="true"/>
<PING timeout="2000"
down_thread="false"
num_initial_members="3"/>
<MERGE2 max_interval="100000"
down_thread="false" min_interval="20000"/>
<FD_SOCK down_thread="false" />
<FD shun="true" down_thread="false"
timeout="20000" max_tries="5"/>
<VERIFY_SUSPECT timeout="1500"
down_thread="false"/>
<pbcast.NAKACK max_xmit_size="60000"
use_mcast_xmit="false" gc_lag="50"
retransmit_timeout="300,600,1200,2400,4800"
down_thread="false"
discard_delivered_msgs="true"/>
<UNICAST timeout="300,600,1200,2400,3600"
down_thread="false" />
<pbcast.STABLE stability_delay="1000"
desired_avg_gossip="50000"
down_thread="false"
max_bytes="400000"/>
<pbcast.GMS print_local_addr="true"
join_timeout="3000"
down_thread="false"
join_retry_timeout="2000"
shun="true"/>
<FC max_credits="2000000" down_thread="false"
min_threshold="0.10"/>
<FRAG2 frag_size="60000" down_thread="false"
up_thread="true"/>
<pbcast.STATE_TRANSFER down_thread="false"
up_thread="false"/>
false
20000
20000
15000
false
org.jboss.cache.buddyreplication.NextMemberBuddyLocator
numBuddies = 1
ignoreColocatedBuddies = true
default
2000
false
true
true
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