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Monitoring Application Performance using Websphere Request Metrics
Version 6.x of WebSphere introduced Request Metrics (PMRM), which unlike Performance Monitoring Infrastructure (PMI) metrics, are transaction based.
Monitor SSL Certificate Expiration/Replace Expired SSL Certificates Automatically
Problem : I have websphere systems which are roll forwarded in future and then rolled back to current date. Certain times I get SSL errors in my log despite setting option to replace expired certificates at deployment manager.
How to Locate Connection Leak in Websphere
Websphere connection manager generally will timeout orphaned connections and send it back to connection pool for reuse. If threads do timeout waiting for connection, connection manager will raise Connectionwaittimeoutexception at websphere logs.
Websphere Dmgr- Node Synchronization : WSX509TrustMa E CWPKI0311E
Environment : Websphere 6.1 Vertical Cluster, 2 JVMS
I have websphere servers which time travel in the future. Normally we don’t go forward over an year which is what SSL is valid for but when we cross that date we have problems. The application state changes to “unknown” as nodeagent fails to communicate with dmgr.
Oracle FlashBack Error : ORA-16014: log 3 sequence not archived, no available destinations
Number of my systems are on Oracle 10g with flashback Area allocated. The Archive logs , redo logs & backups are destined at this area. This morning users complained about system being down and when I looked at alrtlog I could see archive error. Read more…
Configuring Websphere Plugin with NAGIOS Monitoring System
1. Download WAS plugin for Nagios from here.
Websphere : Node Synchronise problem
I had a strange problem this morning. The clustered JVMs were up but Nodeagent was failing to synchronise with DMGR leaving applications in partial start state.
Websphere Diagnostic & Tuning Tools : IBM Support Assistant Workbench
Click on relevant Tools to see working example
Websphere Garbage Collection : How it's done
This morning I noticed one of my JVM (managed Node) log file native_stderr.log was over grown to 4GB. “tail -f native_stderr.log” was scrolling pages continuously indicating some issue with JVM garbage collection.
WebSphere Security: Switch off username/password prompt while shutting down services
In previous releases of WebSphere Application Server, when global security was enabled, both administrative and application security were enabled. In WebSphere Application Server V6.1, the concept of global security is split into administrative security and application security, of which each component can be enabled separately. Application security provides application isolation and requirements for authenticating users for the applications in your environment.
Websphere HTTP plugin failover in a clustered environment
We have a Websphere 6.1 vertical cluster i.e 2 JVMs in a single physical machine with IBM HTTP server.
How to Analyze JVM logs (SystemOut.log, SystemErr.log & startServer.log)
Websphere writes formatted text log messages to SystemOut.log,SystemErr.log & startServer.log files. Read more…
Diagnosing IBM Websphere Service logs
The IBM service log
The IBM service log, referred to as the service log, is a binary file. It contains information written to System.out by the Application Server run time as well as special messages that contain extended service information. This extended service information has been useful to IBM WebSphere Service teams in solving complex problems. IBM has now created additional tools to decipher these binary service logs, such as the Log Analyzer in Application Server. However, it is best to solve as many problems as possible during the development phase, before deploying to a production Application Server environment.
Setting the session timeout for the administrative console
1. Edit the ${WAS_HOME}/systemApps/adminconsole.ear/deployment.xml file in a text editor.
2. Locate the xml statement <tuningParams xmi:id=”TuningParams_1088453565469″ maxInMemorySessionCount=”1000″ allowOverflow=”true” writeFrequency=”TIME_BASED_WRITE” writeInterval=”10″ writeContents=”ONLY_UPDATED_ATTRIBUTES” invalidationTimeout=”30″>
Websphere File Synchronization Service: Replicate changes from Dmgr to NodeAgent
In a distributed server environment, the administrative console is located in the deployment manager server, dmgr. In this case, the administrative console provides centralized administration of multiple nodes. Configuration changes are made to the master repository and pushed to the local repositories on the nodes by the deployment manager. In order for the administrative console to run, the dmgr server must be running. In order for the changes to the master repository to be pushed to the nodes, the node agents must also be running.
Logging commands executed through Websphere(WAS) Admin Console
Use this feature if you want to log or capture “wsadmin” commands excuted by WAS internally. It can be very useful when you want to automate your tasks and don’t know exact wsadmin syntaxes to use.
Where is Websphere profile config stored
Use profileRegistry.xml file to locate name of profiles on system. File normally located at /opt/IBM/WebSphere/AppServer/properties
Read more…
Websphere Routing a Request using Plugin-cfg.xml
The Web Server plug-in uses an XML configuration file to determine whether a request is for the Web Server of the application server. When a request reaches the Web Server, the URL is compared to those managed by the plug-in. If a match is found, the plug-in configuration file contains the information needed to forward the request to the web container using the web container inbound chain.
How to Install SSL certificate under Websphere/Http server
1. Navigate to the /bin-directory of your IHS-Installation $IHS_HOME
2. execute ./ikeyman to open Key Management Tool
Websphere Application Server Clusters
Clusters
Logical grouping of application servers is called clusters. Instead of installing an application on individual server we can install it on a cluster to automatically deploy application on each application cluster.
