This quick troubleshooting guide covers a basic setup of a simple sample application using Coherence*Web instead of traditional WebLogic Server session replication. I used Coherence 3.6.1.x and WebLogic Server 10.3.4 for when I originally created this example, but the steps should be similar for any Coherence 3.5+ and WebLogic Server release capable of using the Coherence*Web SPI, which include some older releases of WLS, but consider 10.3.1+ as the most well-worn-path. I apologize for the formatting, which is a bit sloppy compared to my normal blog posts. This has been in a word doc on my desktop for a long time waiting for when I had time to post it properly. Given two requests for this in the last week I figured a sloppy blog post was better than not sharing it broadly.
For simplicity, we are assuming 2 WebLogic
Server managed server instances in a WLS Cluster are running Coherence*Web as
storage disabled nodes. The WebLogic
Servers will have a simple test web application located here deployed that stores session data on a
Coherence cluster with 2 storage enabled cache servers. There are a sequence of steps that help
validate that session failover is working properly. Some of these steps are from product
documentation, and I've supplemented with my own comments in red. Note
that this example will not use Active Cache, which is a way to manage Coherence
configuration and Cache Server lifecycle from WebLogic Server. I recommend users understand this example
first before adding on Active Cache. More detail on Active Cache including a video is covered in this blog
entry http://blogs.oracle.com/jamesbayer/entry/weblogic_server_1034_screencas
2.2.6.2 Configuring EAR-Scoped Cluster Nodes
To use Coherence*Web for
session management in EAR-scoped cluster nodes, follow these steps:
- Use the WebLogic Server Administration Console to
deploy the coherence.jar and coherence-web-spi.war files
as shared libraries to all of the target servers where the application
will be deployed. See "Install a Java EE Library" in Oracle
Fusion Middleware Oracle WebLogic Server Administration Console Help for
more information.
I always recommend using a
shared library to include the coherence.jar on the classpath of your
application instead of the approach where it is embedded directly inside your
application (say in APP-INF/lib or WEB-INF/lib). This way if you patch or upgrade Coherence, the
most you need to do is redeploy the coherence.jar shared library and your
application. If you use the approach
where your application directly embeds coherence.jar inside of it, then you
need a new build of your application which updates the embedded coherence.jar, which is typically an undesirable process.
Note: The WLS 10.3.1 Administrative
Console will not let you deploy coherence.jar without an error, but you can use
the WLST command like:
deploy('coherence','/scratch/jbayer/coherence/lib/coherence.jar',
libraryModule='true')
This console
deployment issue does not affect WLS
10.3.2+. However, you may note what
appears to be an error when deploying coherence.jar, but if you read it closely "Assuming this is a library deployment." you will see that it is
not an error, it is a warning and you can proceed with the deployment..
Assuming you are using an EAR, create a library reference to coherence in your sample application. Assuming you have an EAR file with a WAR module inside, then weblogic-application.xml looks like this:
<weblogic-application ...>
...
<library-ref>
<library-name>coherence</library-name>
</library-ref>
...
</weblogic-application>
The
above library-ref element will merge the coherence.jar into the APP-INF/lib of
the App during the deployment process, which will make Coherence classes EAR
scoped.
Quick
aside, If you are using a stand-alone WAR file that is not encapsulated inside
of an EAR, then instead of using a library reference, you can use an Optional
Package approach to refer to the library, which involves creating an entry in
the META-INF/manifest.mf of the WAR file like this:
Manifest-Version: 1.0
Class-Path:
Extension-List: coherencejar
coherencejar-Extension-Name: coherence
Note
that there must be a newline at the end of the last line with text otherwise it
will not work correctly. Unlike the
library reference mechanism, the library is not merged into an archive on disk
at deployment time, rather it utilizes a Java Optional Package approach to put
the coherence.jar on the classpath.
For
the WAR modules, have the weblogic.xml use a library reference for the
coherence-web-spi.war like this:
<wls:weblogic-web-app ...
<wls:library-ref>
<wls:library-name>coherence-web-spi</wls:library-name>
</wls:library-ref>
</wls:weblogic-web-app>
This
will merge the contents of the coherence-web-spi.war with the application's web
module.
Now
we also have to configure the tangosol-coherence-override.xml file if you want
to override default configuration settings. One such setting I like to override is to use Well-Known-Addresses
(WKA), which is a unicast approach instead of the default multicast networking
that many Network Administrators do not permit. The tangosol-coherence-override.xml file approach will be easier than using
-D options on the command line because in WLS there may be multiple web applications
using different Coherence configurations, and if you use -D options on the Java
command line, then it is the same configuration for all Coherence instances in
that JVM without some other tedious intervention. I used the latest release of Oracle
Enterprise Pack for Eclipse (OEPE) to create
the below configuration file with the Coherence tooling, which will use these
two WKA addresses and auto-increment the port the more servers you start
(default). I put one copy in the EAR
files APP-INF/classes directory and one in $COHERENCE_HOME. You can replace the hostname of adc2101131.us.oracle.com with appropriate hostnames for your systems. Note that the newer versions of Coherence use
XSD instead of DTD.
<?xml version="1.0"?>
<!DOCTYPE coherence SYSTEM "coherence-override.dtd">
<coherence>
<cluster-config>
<unicast-listener>
<well-known-addresses>
<socket-address id="2">
<address>adc2101131.us.oracle.com</address>
<port>8090</port>
</socket-address>
<socket-address id="1">
<address>adc2101131.us.oracle.com</address>
<port>8088</port>
</socket-address>
</well-known-addresses>
<address system-property="tangosol.coherence.localhost">adc2101131.us.oracle.com</address>
<port system-property="tangosol.coherence.localport">8088</port>
<port-auto-adjust system-property="tangosol.coherence.localport.adjust">true</port-auto-adjust>
</unicast-listener>
</cluster-config>
</coherence>
Then before
you deploy the application to Weblogic Server, you need to setup and start the
cache servers. I simply clone
$COHERENCE_HOME/bin/cache-server.sh to
$COHERENCE_HOME/bin/sessions-cache-server.sh I'll have bolded and highlighted the edits I made....
#!/bin/sh
# This will start a
cache server
# specify the
Coherence installation directory
COHERENCE_HOME=.
# specify the JVM
heap size
MEMORY=512m
if [ ! -f
${COHERENCE_HOME}/bin/session-cache-server.sh ]; then
echo "session-cache-server.sh: must be run
from the Coherence installation directory."
exit
fi
if [ -f
$JAVA_HOME/bin/java ]; then
JAVAEXEC=$JAVA_HOME/bin/java
else
JAVAEXEC=java
fi
JAVA_OPTS="-Xms$MEMORY
-Xmx$MEMORY -Dtangosol.coherence.session.localstorage=true
-Dtangosol.coherence.cacheconfig=WEB-INF/classes/session-cache-config.xml
-Dtangosol.coherence.override=/scratch/jbayer/coherence/tangosol-coherence-override.xml"
$JAVAEXEC -server
-showversion $JAVA_OPTS -cp "$COHERENCE_HOME/lib/coherence.jar:$COHERENCE_HOME/lib/coherence-web-spi.war"
com.tangosol.net.DefaultCacheServer $1
Then start
two instances of the session-cache-server.sh from the $COHERENCE_HOME directory
like this:
bash-3.2$
bin/session-cache-server.sh
Make sure they join the cluster together and
see each other by viewing the member list in the output. Here is the output from the first
server. Note the highlighted areas in
red which show that:
- · the override file we intend is
being used
- · the session-cache-config.xml from
the coherence-web-spi.war is being used
- · that the protocol specified in the
override is being used, in this case WKA mans unicast instead of multicast
- · the distributed sessions service is
storage enabled
bash-3.2$ bin/session-cache-server.sh
java version "1.6.0_21"
Java(TM) SE Runtime Environment (build 1.6.0_21-b51)
Java HotSpot(TM) Server VM (build 17.0-b17, mixed mode)
2011-02-15 23:26:56.374/0.580 Oracle Coherence 3.6.1.0
<Info> (thread=main, member=n/a): Loaded operational configuration from
"jar:file:/scratch/jbayer/coherence/lib/coherence.jar!/tangosol-coherence.xml"
2011-02-15 23:26:56.379/0.585 Oracle Coherence 3.6.1.0
<Info> (thread=main, member=n/a): Loaded operational overrides from
"file:/scratch/jbayer/coherence/tangosol-coherence-override.xml"
2011-02-15 23:26:56.386/0.592 Oracle Coherence 3.6.1.0
<D5> (thread=main, member=n/a): Optional configuration override
"/custom-mbeans.xml" is not specified
Oracle Coherence Version 3.6.1.0 Build 19636
Grid Edition: Development
mode
Copyright (c) 2000, 2010, Oracle and/or its affiliates. All
rights reserved.
2011-02-15 23:26:56.760/0.966 Oracle Coherence GE 3.6.1.0
<Info> (thread=main, member=n/a): Loaded cache configuration from
"jar:file:/scratch/jbayer/coherence/lib/coherence-web-spi.war!/WEB-INF/classes/session-cache-config.xml"
2011-02-15 23:26:57.257/1.463 Oracle Coherence GE 3.6.1.0
<D4> (thread=main, member=n/a): TCMP bound to /10.229.188.238:8088 using
SystemSocketProvider
2011-02-15 23:27:27.613/31.819 Oracle Coherence GE 3.6.1.0
<Info> (thread=Cluster, member=n/a): Created a new cluster with
Member(Id=1, Timestamp=2011-02-15 23:26:57.261, Address=10.229.188.238:8088,
MachineId=21486, Location=machine:jbayer-vm,process:30802,
Role=CoherenceServer, Edition=Grid Edition, Mode=Development, CpuCount=2,
SocketCount=2) UID=0x0AE5BCEE0000012E2D5D5EED53EE1F98
2011-02-15 23:27:27.616/31.822 Oracle Coherence GE 3.6.1.0
<Info> (thread=main, member=n/a): Started cluster Name=n/a
WellKnownAddressList(Size=2,
WKA{Address=10.229.188.238, Port=8090}
WKA{Address=10.229.188.238, Port=8088}
)
MasterMemberSet
(
ThisMember=Member(Id=1,
Timestamp=2011-02-15 23:26:57.261, Address=10.229.188.238:8088,
MachineId=21486, Location=machine:jbayer-vm,process:30802,
Role=CoherenceServer)
OldestMember=Member(Id=1,
Timestamp=2011-02-15 23:26:57.261, Address=10.229.188.238:8088,
MachineId=21486, Location=machine:jbayer-vm,process:30802,
Role=CoherenceServer)
ActualMemberSet=MemberSet(Size=1, BitSetCount=2
Member(Id=1,
Timestamp=2011-02-15 23:26:57.261, Address=10.229.188.238:8088,
MachineId=21486, Location=machine:jbayer-vm,process:30802,
Role=CoherenceServer)
)
RecycleMillis=1200000
RecycleSet=MemberSet(Size=0, BitSetCount=0
)
)
TcpRing{Connections=[]}
IpMonitor{AddressListSize=0}
2011-02-15 23:27:27.665/31.871 Oracle Coherence GE 3.6.1.0
<D5> (thread=Invocation:Management, member=1): Service Management joined
the cluster with senior service member 1
2011-02-15 23:27:27.828/32.034 Oracle Coherence GE 3.6.1.0
<D5> (thread=ReplicatedCache:ReplicatedSessionsMisc, member=1): Service
ReplicatedSessionsMisc joined the cluster with senior service member 1
2011-02-15 23:27:28.074/32.280 Oracle Coherence GE 3.6.1.0
<D5> (thread=DistributedCache:DistributedSessions, member=1): Service
DistributedSessions joined the cluster with senior service member 1
2011-02-15 23:27:28.105/32.311 Oracle Coherence GE 3.6.1.0
<Info> (thread=main, member=1):
Services
(
ClusterService{Name=Cluster, State=(SERVICE_STARTED, STATE_JOINED),
Id=0, Version=3.6, OldestMemberId=1}
InvocationService{Name=Management, State=(SERVICE_STARTED), Id=1,
Version=3.1, OldestMemberId=1}
ReplicatedCache{Name=ReplicatedSessionsMisc, State=(SERVICE_STARTED),
Id=2, Version=3.0, OldestMemberId=1}
PartitionedCache{Name=DistributedSessions, State=(SERVICE_STARTED), LocalStorage=enabled, PartitionCount=257,
BackupCount=1, AssignedPartitions=257, BackupPartitions=0}
)
Started DefaultCacheServer...
Here is the output from the second cache server. Note that it shows both servers being part
of the cluster now. I'll highlight a few
things to look for. Notably, the same
configuration values are used as the previous cluster and that this time the
member id is 2 and at the end this node asks the member 1 for some partitions.
bash-3.2$ bin/session-cache-server.sh
java version "1.6.0_21"
Java(TM) SE Runtime Environment (build 1.6.0_21-b51)
Java HotSpot(TM) Server VM (build 17.0-b17, mixed mode)
2011-02-15 23:34:51.856/0.251 Oracle Coherence 3.6.1.0
<Info> (thread=main, member=n/a): Loaded operational configuration from
"jar:file:/scratch/jbayer/coherence/lib/coherence.jar!/tangosol-coherence.xml"
2011-02-15 23:34:51.861/0.256 Oracle Coherence 3.6.1.0
<Info> (thread=main, member=n/a): Loaded operational overrides from
"file:/scratch/jbayer/coherence/tangosol-coherence-override.xml"
2011-02-15 23:34:51.866/0.261 Oracle Coherence 3.6.1.0
<D5> (thread=main, member=n/a): Optional configuration override
"/custom-mbeans.xml" is not specified
Oracle Coherence Version 3.6.1.0 Build 19636
Grid Edition: Development
mode
Copyright (c) 2000, 2010, Oracle and/or its affiliates. All
rights reserved.
2011-02-15 23:34:52.147/0.542 Oracle Coherence GE 3.6.1.0
<Info> (thread=main, member=n/a): Loaded cache configuration from
"jar:file:/scratch/jbayer/coherence/lib/coherence-web-spi.war!/WEB-INF/classes/session-cache-config.xml"
2011-02-15 23:34:52.500/0.895 Oracle Coherence GE 3.6.1.0
<D4> (thread=main, member=n/a): TCMP bound to /10.229.188.238:8090
using SystemSocketProvider
2011-02-15 23:35:16.251/24.646 Oracle Coherence GE 3.6.1.0
<Info> (thread=Cluster, member=n/a): This
Member(Id=2, Timestamp=2011-02-15 23:35:16.04,
Address=10.229.188.238:8090, MachineId=21486,
Location=machine:jbayer-vm,process:31080, Role=CoherenceServer, Edition=Grid
Edition, Mode=Development, CpuCount=2, SocketCount=2) joined cluster with
senior Member(Id=1, Timestamp=2011-02-15 23:34:45.487,
Address=10.229.188.238:8088, MachineId=21486,
Location=machine:jbayer-vm,process:31060, Role=CoherenceServer, Edition=Grid
Edition, Mode=Development, CpuCount=2, SocketCount=2)
2011-02-15 23:35:16.270/24.665 Oracle Coherence GE 3.6.1.0
<D5> (thread=Cluster, member=n/a): Member 1 joined Service Cluster with
senior member 1
2011-02-15 23:35:16.270/24.665 Oracle Coherence GE 3.6.1.0
<D5> (thread=Cluster, member=n/a): Member 1 joined Service Management
with senior member 1
2011-02-15 23:35:16.270/24.665 Oracle Coherence GE 3.6.1.0
<D5> (thread=Cluster, member=n/a): Member 1 joined Service
ReplicatedSessionsMisc with senior member 1
2011-02-15 23:35:16.270/24.665 Oracle Coherence GE 3.6.1.0
<D5> (thread=Cluster, member=n/a): Member 1 joined Service
DistributedSessions with senior member 1
2011-02-15 23:35:16.273/24.668 Oracle Coherence GE 3.6.1.0
<Info> (thread=main, member=n/a): Started cluster Name=n/a
WellKnownAddressList(Size=2,
WKA{Address=10.229.188.238, Port=8088}
WKA{Address=10.229.188.238, Port=8090}
)
MasterMemberSet
(
ThisMember=Member(Id=2,
Timestamp=2011-02-15 23:35:16.04, Address=10.229.188.238:8090, MachineId=21486,
Location=machine:jbayer-vm,process:31080, Role=CoherenceServer)
OldestMember=Member(Id=1, Timestamp=2011-02-15 23:34:45.487,
Address=10.229.188.238:8088, MachineId=21486,
Location=machine:jbayer-vm,process:31060, Role=CoherenceServer)
ActualMemberSet=MemberSet(Size=2,
BitSetCount=2
Member(Id=1,
Timestamp=2011-02-15 23:34:45.487, Address=10.229.188.238:8088,
MachineId=21486, Location=machine:jbayer-vm,process:31060,
Role=CoherenceServer)
Member(Id=2,
Timestamp=2011-02-15 23:35:16.04, Address=10.229.188.238:8090, MachineId=21486,
Location=machine:jbayer-vm,process:31080, Role=CoherenceServer)
)
RecycleMillis=1200000
RecycleSet=MemberSet(Size=0, BitSetCount=0
)
)
TcpRing{Connections=[1]}
IpMonitor{AddressListSize=0}
2011-02-15 23:35:16.321/24.716 Oracle Coherence GE 3.6.1.0
<D5> (thread=Invocation:Management, member=2): Service Management joined
the cluster with senior service member 1
2011-02-15 23:35:16.429/24.825 Oracle Coherence GE 3.6.1.0
<D5> (thread=ReplicatedCache:ReplicatedSessionsMisc, member=2): Service
ReplicatedSessionsMisc joined the cluster with senior service member 1
2011-02-15 23:35:16.618/25.013 Oracle Coherence GE 3.6.1.0
<D5> (thread=DistributedCache:DistributedSessions, member=2): Service
DistributedSessions joined the cluster with senior service member 1
2011-02-15 23:35:16.648/25.043 Oracle Coherence GE 3.6.1.0
<Info> (thread=main, member=2):
Services
(
ClusterService{Name=Cluster, State=(SERVICE_STARTED, STATE_JOINED),
Id=0, Version=3.6, OldestMemberId=1}
InvocationService{Name=Management, State=(SERVICE_STARTED), Id=1,
Version=3.1, OldestMemberId=1}
ReplicatedCache{Name=ReplicatedSessionsMisc, State=(SERVICE_STARTED),
Id=2, Version=3.0, OldestMemberId=1}
PartitionedCache{Name=DistributedSessions, State=(SERVICE_STARTED), LocalStorage=enabled, PartitionCount=257,
BackupCount=1, AssignedPartitions=0, BackupPartitions=0}
)
Started DefaultCacheServer...
2011-02-15 23:35:16.657/25.052 Oracle Coherence GE 3.6.1.0
<D4> (thread=DistributedCache:DistributedSessions, member=2): Asking member 1 for 128 primary partitions
If the cluster has formed well, then we are
ready to deploy the application to WebLogic Server. Deploy CWebTestApp.ear (assuming you have the
correct values for APP-INF/classes/tangosol-coherence-override.xml inside of it
and see if it activates and joins the cluster. Here is output from one of the two managed servers in the WLS cluster. Your output may vary to a degree.
<Feb 16, 2011 12:12:02 AM PST> <Notice>
<WebLogicServer> <BEA-000360> <Server started in RUNNING
mode>
<Feb 16, 2011 12:13:09 AM PST> <Warning>
<Munger> <BEA-2156203> <A version attribute was not found in
element application in the deployment descriptor in
/scratch/jbayer/wls1034/user_projects/domains/base_domain/servers/ManagedServer_2/stage/CWebTestApp/CWebTestApp.ear/META-INF/application.xml.
A version attribute is required, but this version of the Weblogic Server will
assume that the JEE5 is used. Future versions of the Weblogic Server will
reject descriptors that do not specify the JEE version.>
<Feb 16, 2011 12:13:09 AM PST> <Warning>
<Munger> <BEA-2156203> <A version attribute was not found in
element application in the deployment descriptor in
/scratch/jbayer/wls1034/user_projects/domains/base_domain/servers/ManagedServer_2/tmp/_WL_user/CWebTestApp/sapbbg/META-INF/application.xml.
A version attribute is required, but this version of the Weblogic Server will
assume that the JEE5 is used. Future versions of the Weblogic Server will
reject descriptors that do not specify the JEE version.>
2011-02-16 00:13:10.175/115.554 Oracle Coherence 3.6.1.0
<Info> (thread=[STANDBY] ExecuteThread: '5' for queue:
'weblogic.kernel.Default (self-tuning)', member=n/a): Loaded operational
configuration from "zip:/scratch/jbayer/wls1034/user_projects/domains/base_domain/servers/ManagedServer_2/stage/coherence/3.6.1.0@3.6.1.0/coherence.jar!/tangosol-coherence.xml"
2011-02-16 00:13:10.190/115.568 Oracle Coherence 3.6.1.0
<Info> (thread=[STANDBY] ExecuteThread: '5' for queue:
'weblogic.kernel.Default (self-tuning)', member=n/a): Loaded operational
overrides from
"zip:/scratch/jbayer/wls1034/user_projects/domains/base_domain/servers/ManagedServer_2/stage/coherence/3.6.1.0@3.6.1.0/coherence.jar!/tangosol-coherence-override-dev.xml"
2011-02-16 00:13:10.191/115.569 Oracle Coherence 3.6.1.0
<Info> (thread=[STANDBY] ExecuteThread: '5' for queue:
'weblogic.kernel.Default (self-tuning)', member=n/a): Loaded operational
overrides from
"file:/scratch/jbayer/wls1034/user_projects/domains/base_domain/servers/ManagedServer_2/tmp/_WL_user/CWebTestApp/sapbbg/APP-INF/classes/tangosol-coherence-override.xml"
2011-02-16 00:13:10.197/115.575 Oracle Coherence 3.6.1.0
<D5> (thread=[STANDBY] ExecuteThread: '5' for queue:
'weblogic.kernel.Default (self-tuning)', member=n/a): Optional configuration
override "/custom-mbeans.xml" is not specified
Oracle Coherence Version 3.6.1.0 Build 19636
Grid Edition: Development
mode
Copyright (c) 2000, 2010, Oracle and/or its affiliates. All
rights reserved.
2011-02-16 00:13:10.391/115.769 Oracle Coherence GE 3.6.1.0
<Info> (thread=[STANDBY] ExecuteThread: '5' for queue:
'weblogic.kernel.Default (self-tuning)', member=n/a): Loaded cache
configuration from
"file:/scratch/jbayer/wls1034/user_projects/domains/base_domain/servers/ManagedServer_2/tmp/_WL_user/coherence-web-spi/4yxuqd/WEB-INF/classes/session-cache-config.xml"
<Feb 16, 2011 12:13:10 AM PST> <Warning>
<WorkManager> <BEA-002919> <Unable to find a WorkManager with
name wm/CoherenceWorkManager. Dispatch policy wm/CoherenceWorkManager will map
to the default WorkManager for the application CWebTestApp>
2011-02-16 00:13:10.681/116.059 Oracle Coherence GE 3.6.1.0
<D5> (thread=[ACTIVE] ExecuteThread: '0' for queue:
'weblogic.kernel.Default (self-tuning)', member=n/a):
Clustered Session Cache
Name=session-storage
Local Session Cache
Name=local-session-storage
Local Session Attribute
Cache Name=local-attribute-storage
Death Certificate Cache
Name=session-death-certificates
SessionDistributionController Class Name=
AttributeScopeController
Class
Name=com.tangosol.coherence.servlet.AbstractHttpSessionCollection$ApplicationScopeController
Maximum Session Inactive
Seconds=3600
Session ID Character
Length=52
Session Locking
Enforced=false
Member Session Locking
Enforced=false
Application Session
Locking Enforced=false
Thread Session Locking
Enforced=false
Session Get Lock
Timeout=300
Suspect Attribute
Detection=false
Strict "Servlet
Specification" Exception Handling=true
Sticky Session
Ownership=false
Sticky Session Ownership
Service Name=SessionOwnership
Assume Session Locality
for Reaping=false
Parallel Session
Reaping=true
Allow Local
Attributes=false
Use Default Session ID
Decoding=true
Use Default Session ID
Encoding=false
Session Expiry Filter
Factory=
2011-02-16 00:13:11.256/116.634 Oracle Coherence GE 3.6.1.0
<Warning> (thread=[ACTIVE] ExecuteThread: '0' for queue:
'weblogic.kernel.Default (self-tuning)', member=n/a): PreferredUnicastUdpSocket
failed to set receive buffer size to 1428 packets (1.99MB); actual size is 25%,
357 packets (512KB). Consult your OS documentation regarding increasing the
maximum socket buffer size. Proceeding with the actual value may cause
sub-optimal performance.
2011-02-16 00:13:11.257/116.635 Oracle Coherence GE 3.6.1.0
<D4> (thread=[ACTIVE] ExecuteThread: '0' for queue:
'weblogic.kernel.Default (self-tuning)', member=n/a): TCMP bound to
/10.229.188.238:8094 using SystemSocketProvider
2011-02-16 00:13:11.595/116.973 Oracle Coherence GE 3.6.1.0
<Info> (thread=Cluster, member=n/a): Failed to satisfy the variance:
allowed=16, actual=45
2011-02-16 00:13:11.596/116.974 Oracle Coherence GE 3.6.1.0
<Info> (thread=Cluster, member=n/a): Increasing allowable variance to 19
2011-02-16 00:13:11.944/117.322 Oracle Coherence GE 3.6.1.0
<Info> (thread=Cluster, member=n/a): This Member(Id=10,
Timestamp=2011-02-16 00:13:11.72, Address=10.229.188.238:8094, MachineId=21486,
Location=machine:jbayer-vm,process:32763, Role=WeblogicServer, Edition=Grid
Edition, Mode=Development, CpuCount=2, SocketCount=2) joined cluster with
senior Member(Id=1, Timestamp=2011-02-15 23:34:45.487,
Address=10.229.188.238:8088, MachineId=21486,
Location=machine:jbayer-vm,process:31060, Role=CoherenceServer, Edition=Grid
Edition, Mode=Development, CpuCount=2, SocketCount=2)
2011-02-16 00:13:11.997/117.375 Oracle Coherence GE 3.6.1.0
<D5> (thread=Cluster, member=n/a): Member(Id=2, Timestamp=2011-02-15
23:35:16.04, Address=10.229.188.238:8090, MachineId=21486,
Location=machine:jbayer-vm,process:31080, Role=CoherenceServer) joined Cluster
with senior member 1
2011-02-16 00:13:11.999/117.377 Oracle Coherence GE 3.6.1.0
<D5> (thread=Cluster, member=n/a): Member(Id=9, Timestamp=2011-02-16
00:13:11.687, Address=10.229.188.238:8092, MachineId=21486,
Location=machine:jbayer-vm,process:32676, Role=WeblogicServer) joined Cluster
with senior member 1
2011-02-16 00:13:12.044/117.422 Oracle Coherence GE 3.6.1.0
<D5> (thread=Cluster, member=n/a): Member 1 joined Service Cluster with
senior member 1
2011-02-16 00:13:12.045/117.424 Oracle Coherence GE 3.6.1.0
<D5> (thread=Cluster, member=n/a): Member 1 joined Service Management
with senior member 1
2011-02-16 00:13:12.046/117.424 Oracle Coherence GE 3.6.1.0
<D5> (thread=Cluster, member=n/a): Member 1 joined Service
ReplicatedSessionsMisc with senior member 1
2011-02-16 00:13:12.046/117.424 Oracle Coherence GE 3.6.1.0
<D5> (thread=Cluster, member=n/a): Member 1 joined Service
DistributedSessions with senior member 1
2011-02-16 00:13:12.046/117.424 Oracle Coherence GE 3.6.1.0
<D5> (thread=Cluster, member=n/a): Member 2 joined Service Cluster with
senior member 1
2011-02-16 00:13:12.046/117.424 Oracle Coherence GE 3.6.1.0
<D5> (thread=Cluster, member=n/a): Member 2 joined Service Management
with senior member 1
2011-02-16 00:13:12.046/117.424 Oracle Coherence GE 3.6.1.0
<D5> (thread=Cluster, member=n/a): Member 2 joined Service
ReplicatedSessionsMisc with senior member 1
2011-02-16 00:13:12.046/117.424 Oracle Coherence GE 3.6.1.0
<D5> (thread=Cluster, member=n/a): Member 2 joined Service DistributedSessions
with senior member 1
2011-02-16 00:13:12.087/117.465 Oracle Coherence GE 3.6.1.0
<Info> (thread=[ACTIVE] ExecuteThread: '0' for queue:
'weblogic.kernel.Default (self-tuning)', member=n/a): Started cluster Name=n/a
WellKnownAddressList(Size=2,
WKA{Address=10.229.188.238, Port=8088}
WKA{Address=10.229.188.238, Port=8090}
)
MasterMemberSet
(
ThisMember=Member(Id=10,
Timestamp=2011-02-16 00:13:11.72, Address=10.229.188.238:8094, MachineId=21486,
Location=machine:jbayer-vm,process:32763, Role=WeblogicServer)
OldestMember=Member(Id=1, Timestamp=2011-02-15 23:34:45.487,
Address=10.229.188.238:8088, MachineId=21486,
Location=machine:jbayer-vm,process:31060, Role=CoherenceServer)
ActualMemberSet=MemberSet(Size=4,
BitSetCount=2
Member(Id=1,
Timestamp=2011-02-15 23:34:45.487, Address=10.229.188.238:8088,
MachineId=21486, Location=machine:jbayer-vm,process:31060, Role=CoherenceServer)
Member(Id=2,
Timestamp=2011-02-15 23:35:16.04, Address=10.229.188.238:8090, MachineId=21486,
Location=machine:jbayer-vm,process:31080, Role=CoherenceServer)
Member(Id=9,
Timestamp=2011-02-16 00:13:11.687, Address=10.229.188.238:8092,
MachineId=21486, Location=machine:jbayer-vm,process:32676, Role=WeblogicServer)
Member(Id=10,
Timestamp=2011-02-16 00:13:11.72, Address=10.229.188.238:8094, MachineId=21486,
Location=machine:jbayer-vm,process:32763, Role=WeblogicServer)
)
RecycleMillis=1200000
RecycleSet=MemberSet(Size=0, BitSetCount=0
)
)
TcpRing{Connections=[9]}
IpMonitor{AddressListSize=0}
2011-02-16 00:13:12.199/117.577 Oracle Coherence GE 3.6.1.0
<D5> (thread=Invocation:Management, member=10): Service Management joined
the cluster with senior service member 1
2011-02-16 00:13:12.234/117.612 Oracle Coherence GE 3.6.1.0 <D5>
(thread=Cluster, member=10): Member 9 joined Service Management with senior
member 1
2011-02-16 00:13:12.478/117.856 Oracle Coherence GE 3.6.1.0
<D5> (thread=DistributedCache:DistributedSessions, member=10): Service
DistributedSessions joined the cluster with senior service member 1
2011-02-16 00:13:12.560/117.938 Oracle Coherence GE 3.6.1.0
<D5> (thread=Cluster, member=10): Member 9 joined Service
DistributedSessions with senior member 1
2011-02-16 00:13:12.618/117.996 Oracle Coherence GE 3.6.1.0
<Info> (thread=[ACTIVE] ExecuteThread: '0' for queue:
'weblogic.kernel.Default (self-tuning)', member=10): Configured session model
"SplitHttpSessionCollection":
Clustered Session Cache
Name=session-storage
Local Session Cache
Name=local-session-storage
Local Session Attribute
Cache Name=local-attribute-storage
Death Certificate Cache
Name=session-death-certificates
SessionDistributionController Class Name=
AttributeScopeController
Class Name=com.tangosol.coherence.servlet.AbstractHttpSessionCollection$ApplicationScopeController
Maximum Session Inactive
Seconds=3600
Session ID Character
Length=52
Session Locking
Enforced=false
Member Session Locking
Enforced=false
Application Session
Locking Enforced=false
Thread Session Locking
Enforced=false
Session Get Lock
Timeout=300
Suspect Attribute
Detection=false
Strict "Servlet
Specification" Exception Handling=true
Sticky Session
Ownership=false
Sticky Session Ownership
Service Name=SessionOwnership
Assume Session Locality
for Reaping=false
Parallel Session
Reaping=true
Allow Local
Attributes=false
Use Default Session ID
Decoding=true
Use Default Session ID
Encoding=false
Session Expiry Filter
Factory=
2011-02-16 00:13:12.723/118.101 Oracle Coherence GE 3.6.1.0
<Info> (thread=[ACTIVE] ExecuteThread: '0' for queue:
'weblogic.kernel.Default (self-tuning)', member=10): Registering
HttpSessionManager(ServetContext=ServletContextWrapper (2.5)
SessionHelper!=null
MajorVersion=2
MinorVersion=5
Clustered=false
ServletContext
(wrapped)=weblogic.servlet.internal.session.CoherenceWebServletContextWrapper@1bc1ecee
AttributeMap=null
Oracle Coherence
3.6.1.0) using object name "type=HttpSessionManager,nodeId=10,appId=CWebTestAppcounter"
If so, now try invoking the index.jsp of the
counter context path. If both managed
servers on are the same hostname, then the same cookie will be sent by the
browser (ports differences are ignored by browsers when sending cookies), and
you should see the counter increment by 1 when you have the same session. If your WLS servers happen to have different
IP addresses or hostnames, then you will have to use a load balancer. More on that later.
To see if Coherence is really being used for
session state, kill all the WLS JVM(s) (not the Coherence session cache
servers!). Hit refresh in your browser. Both servers should be down. Keep the browser sessions open.
Now
restart the WLS managed servers. Since
the browser is open, the session reference is still in your browser cookie. When WLS servers are started again and you can
refresh the page, the count should pick up where you left off and not start
over.
Now you can try the load balancer such as Apache
or the simple one included with coherence. In this case I'm going to have the simple load balancer on port 8080 and
refer to the managed servers on ports 8001/8002 respectively.
java -cp
coherence.jar com.tangosol.net.LoadBalancer adc2101131:8080 adc2101131:8001
adc2101131:8002
Now I should be able to hit the load balancer
directly on port 8080. Using the same
browser session, I see that the cookie is still valid.
Plus I see that the output from the simple load
balancer shows me going to both servers, therefore we observe that the simple
Coherence load balancer is not sticky. Below is an example of that output:
routing to 10.229.188.238:8002
routing to 10.229.188.238:8001
Now you should be able to stop one WLS managed
server and refresh and still get a valid result. If you refresh several times the LoadBalancer
output should have something like this in the System.Out showing that it failed
to connect to the server you stopped.
*** could not connect to 10.229.188.238:8002;
java.net.ConnectException: Connection refused
Then
stop the other WLS managed server. Refresh
using the proxy address and there should be a failure to connect from the
browser. Then restart the managed server
you stopped first and the session should recover.
This marks the end of the basic Coherence*Web
with WebLogic Server example. For more
information, I recommend reading the Coherence*Web documentation and turning on
the JMX reporting features of Coherence and using a tool like JConsole to
explore the MBeans for Coherence*Web.
10 comments:
Thanks for your post. Any thoughts on the network buffer errors reported in the log:
"PreferredUnicastUdpSocket failed to set receive buffer size to 1428 packets (1.99MB); actual size is 25%" (blablabla).
Is this of concern in a virtual environment specifically?
thanks
John W
Thanks for your post.
I can't get rid of message "No storage-enabled nodes exist for service DistributedSessions".
Is this linked with coherence-cache-config.xml ?
I did not setup anything in this file. Just probably using the one in coherence.jat (template).
If you have any idea, thanks for your help.
/Stéphane.
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