Hello,
I should apologise in advance as I'm very new to Tomcat and, I'm sure,
will be making some daft mistakes and silly errors. I hope this
question and any that follow it aren't too dumb.
I've recently started a new job and have inherited a half-finished
tomcat cluster on solaris.
While I'm not going to immediately try and finish that cluster, I would
like to try setting up some test instances to ensure I know what to
expect - but I'm having trouble doing even this.
I've gotten my head round how to set up individual instances of Tomcat
8.5.23 running from different sub folders of a common CATALINA_HOME
folder, and now I'm trying to get the two instances to talk to each
other using StaticMember on specific ports rather than the automatic
multicasting.
But instances start up, and the logs at least suggest they're aware of
each other. But one server takes forever to start, and I'm not
convinced they're talking to each other properly. For example, in the
catalina.out logs I'm seeing messages such as:
30-Oct-2017 09:28:29.632 INFO [MyHost-startStop-1]
org.apache.catalina.ha.session.DeltaManager.getAllClusterSessions
Manager [/sample], requesting session state from
[org.apache.catalina.tribes.membership.StaticMember[tcp://my.ip.addr:40
01,my.ip.addr,4001, alive=0, securePort=-1, UDP Port=-1, id={1 2 3 4 5
6 7 8 9 10 11 12 13 14 15 0 }, payload={}, command={}, domain={99 108
117 115 116 101 114 116 101 ...(11)}, ]]. This operation will timeout
if no session state has been received within [60] seconds.
30-Oct-2017 09:28:34.111 WARNING [Tribes-Task-Receiver[MyHost-Channel]-
2]
org.apache.catalina.tribes.group.interceptors.DomainFilterInterceptor.m
essageReceived Received message from
cluster[org.apache.catalina.tribes.membership.MemberImpl[tcp://{my, ip,
nn, nn}:4001,{my, ip, nn, nn},4001, alive=1509355714104, securePort=-
1,
UDP Port=-1, id={1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 }, payload={},
command={}, domain={99 108 117 115 116 101 114 116 101 ...(11)}, ]] was
refused.
Which does not seem encouraging. Yet on the other instance, I'm
seeing:
30-Oct-2017 09:28:34.105 INFO [GroupChannel-Heartbeat[MyHost-Channel]-
1] org.apache.catalina.ha.tcp.SimpleTcpCluster.memberAdded Replication
member
added:[org.apache.catalina.tribes.membership.StaticMember[tcp://my.ip.a
ddr:4000,my.ip.addr,4000, alive=0, securePort=-1, UDP Port=-1, id={0 1
2 3 4 5 6 7 8 9 10 11 12 13 14 15 }, payload={}, command={}, domain={99
108 117 115 116 101 114 116 101 ...(11)}, ]]
30-Oct-2017 09:28:34.105 INFO [GroupChannel-Heartbeat[MyHost-Channel]-
1]
org.apache.catalina.tribes.group.interceptors.TcpFailureDetector.perfor
mBasicCheck Suspect member, confirmed
alive.[org.apache.catalina.tribes.membership.StaticMember[tcp://my.ip.a
ddr:4000,my.ip.addr,4000, alive=0, securePort=-1, UDP Port=-1, id={0 1
2 3 4 5 6 7 8 9 10 11 12 13 14 15 }, payload={}, command={}, domain={99
108 117 115 116 101 114 116 101 ...(11)}, ]]
Which seems better... But then I see back on instance one,
30-Oct-2017 09:32:30.178 INFO [main]
org.apache.catalina.startup.Catalina.start Server startup in 241109 ms
Which seems really bad.
I've installed the 'examples' app on both instances, have added
'<distributable/>' to both's web.xml file.
I can see on one instance a message such as
30-Oct-2017 09:35:22.600 INFO [http-nio-8081-exec-7]
org.apache.catalina.core.ApplicationContext.log SessionListener:
sessionCreated('C2C3720879E72D558EEF4B0655188EBD.beta')
30-Oct-2017 09:35:26.912 INFO [http-nio-8081-exec-8]
org.apache.catalina.core.ApplicationContext.log SessionListener:
attributeAdded('C2C3720879E72D558EEF4B0655188EBD.beta', 'foo', 'bar')
When I play with the sessions example code. But nothing on the other
instance that would suggest this is being replicated.
Before I make this post too long and post my server.xml code, could
someone advise me as to what I should be looking for, or what these
messages suggest? Any pointers at this stage would be grateful as I'm
unsure even what a working cluster should look like.
Thanks
Dave
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