Datasource monitoring is one of the key monitoring topics in weblogic based applications. We have been using simple WLST script to alert us when a datasource is not working properly. Most of the times, root cause will be a intermittent network/DB issue. To recover from the issue, we will reset/restart Continue Reading
Weblogic
Weblogic Admin server failing to start with error: Service weblogic.server.ServerLifeCycleService was started at level 9 but it has a run level of 10
We had an issue with shared storage server which is used to store weblogic admin server configuration. So, we restarted the admin server once the storage issue was resolved. But restart failed with below errors: It was not very clear what was causing issue from the above logs. So, started Continue Reading
Weblogic Managed Server Start Hanging after Deployment
We have a 4 node test SOA/Weblogic cluster. After CI deployment, the pipeline automatically restarted SOA managed servers. But managed servers in all 4 nodes stuck in STARTING state. We faced similar startup issues earlier. So, revisited these pages: Issue 1, Issue 2, Issue 3, Issue 4, to check if Continue Reading
Target Servers Missing from Datasource Testing Tab
When we get errors related to datasource in weblogic, first thing we do is go to datasource Monitoring -> Testing tab and test datasource. Sometimes, targets might be missing from this tab. DurING server startup, server tries to load datasource and create connections to database. If there is any underlying Continue Reading
Weblogic Admin Server startup failing with FORCE_SHUTTING_DOWN
We shutdown our test weblogic admin server to apply recent security patches. Our colleague applied the path and tried to start Admin server. Server didn’t come-up and was failing with below error: A MultiException has 6 exceptions. They are: weblogic.security.SecurityInitializationException: Authentication denied: Boot identity not valid. The user name or Continue Reading
How to get weblogic password without using wlst
There is a simpler and quicker of getting weblogic password without using wlst script. But the caveat is that password should have already been present in boot.properties file. Start the application using strace and you can view the password in strace output file. Here is sample command: strace -s 400 Continue Reading
Useful bashrc files
We as sysadmin spend lot of time at command line and most of the time we use few regular commands like going to logs directory, searching history. I have prepared bash aliases that can be used to save few keystrokes for various applications like weblogic, kubernetes, Boomi etc. And these Continue Reading
Weblogic Log Extractor and Summarizer
As sysadmins, we need to daily deal with logs. It is overwhelming to check huge log files especially for application servers like weblogic which has numerous log files like diagnostic, server log, out log, OHS logs etc. It is time consuming and quickly lead to fatigue if log files are Continue Reading
Weblogic Admin Server Stuck during Startup
Recently, we had an issue at VM level which forced us to restart application servers. Most of the weblogic applications started without any issue except one application. When we tried to start admin server, it was hung for a long time. I faced similar issues earlier (Case 1, Case 2, Continue Reading
SSL Offloading at OHS Layer
As more and more workloads are moving to security has become more important than ever. SSL over http also know as https is used to encrypt data between client and server i.e., to secure data over wire. It became ubiquitous even for internal applications. Gone are those days doing business Continue Reading