Stuck threads cannot be killed. All you can do is to find the root cause and fix it. Make a thread dump and analyse it. Check this link for some guidance..
Then, what is stuck thread in WebLogic?
WebLogic Server considers a thread a “stuck thread” when the thread takes more than a specified amount of time to process a single request. When the server encounters a stuck thread situation, it may shut itself down or shut down the Work Manager. It may also switch the application to admin mode.
Additionally, how do you analyze stuck threads in WebLogic? In you have stuck threads but the WebLogic Console is still available, you can go to Environment, Servers and select a server. Now you can go to Monitoring, Threads. Here you can look at threads and identify stuck and hogging threads. Also you can request a dump of the Thread stacks.
Beside this, why stuck threads occur in WebLogic?
WebLogic Server automatically detects when a thread in an execute queue becomes "stuck." Because a stuck thread cannot complete its current work or accept new work, the server logs a message each time it diagnoses a stuck thread.
What is stuck thread in Java?
Stuck Threads are threads that are blocked, and can't return to the threadpool for a certain amout of time. By Default, the WLS comes with 600 secs. If some thread doesn't return in 600 secs, It gets a flag 'stuck thread'. – > Stuck Threads are only flags, there to warn you that this thread is taking too long.
Related Question Answers
How can increase stuck thread time in WebLogic?
9.3 Increasing the WebLogic Server stuck thread time-out - Type the user name and password that you created for the WebLogic Server domain and click Log In.
- Under Change Center, click Lock & Edit.
- Under Domain Structure, click Environment > Servers and, in the right pane, click the managed server name.
- On the Configuration tab, click on the Tuning tab.
What are thread dumps?
A thread dump is a snapshot of the state of all threads that are part of the process. The state of each thread is presented with a so called stack trace, which shows the contents of a thread's stack. Some of the threads belong to the Java application you are running, while others are JVM internal threads.What is WorkManager in WebLogic?
WebLogic uses a concept called WorkManager in order to prioritize work and maintain threads and thread-pools. WorkManager can be created and configured by the administrator on the WebLogic level or by application developers on the application level (deployment descriptors).What is thread dump and heap dump in WebLogic?
Thread dump - Shows what each thread in a process is doing at a given point in time along with the stack trace. Core dump - O/S level dump file which has O/S level info in addition to the heap dump. Heap dump - is useful to analyse OOM situations. Thread dump - To troubleshoot slow running of your application.What is JVMD?
JVM Diagnostics (JVMD) is one of the critical functionalities in Enterprise Manager Cloud Control that enables administrators to diagnose performance problems in Java applications in the production environment.What is difference between heap dump and thread dump?
A thread dump is a dump of the stacks of all live threads. A heap dump is a dump of the state of the Java heap memory. Thus useful for analysing what use of memory an app is making at some point in time so handy in diagnosing some memory issues, and if done at intervals handy in diagnosing memory leaks.What is thread in Java?
Multithreading in Java. Multithreading is a Java feature that allows concurrent execution of two or more parts of a program for maximum utilization of CPU. Each part of such program is called a thread. So, threads are light-weight processes within a process.What is thread in computer architecture?
A thread in computer science is short for a thread of execution. Threads are a way for a program to split itself into two or more simultaneously (or pseudo- simultaneously) running tasks. Multiple threads can be executed in parallel on many computer systems. 
