[java] WAITING at sun.misc.Unsafe.park(Native Method)

I had a similar issue, and following previous answers (thanks!), I was able to search and find how to handle correctly the ThreadPoolExecutor terminaison.

In my case, that just fix my progressive increase of similar blocked threads:

  • I've used ExecutorService::awaitTermination(x, TimeUnit) and ExecutorService::shutdownNow() (if necessary) in my finally clause.
  • For information, I've used the following commands to detect thread count & list locked threads:

    ps -u javaAppuser -L|wc -l

    jcmd `ps -C java -o pid=` Thread.print >> threadPrintDayA.log

    jcmd `ps -C java -o pid=` Thread.print >> threadPrintDayAPlusOne.log

    cat threadPrint*.log |grep "pool-"|wc -l

Examples related to java

Under what circumstances can I call findViewById with an Options Menu / Action Bar item? How much should a function trust another function How to implement a simple scenario the OO way Two constructors How do I get some variable from another class in Java? this in equals method How to split a string in two and store it in a field How to do perspective fixing? String index out of range: 4 My eclipse won't open, i download the bundle pack it keeps saying error log

Examples related to multithreading

How can compare-and-swap be used for a wait-free mutual exclusion for any shared data structure? Waiting until the task finishes What is the difference between Task.Run() and Task.Factory.StartNew() Why is setState in reactjs Async instead of Sync? What exactly is std::atomic? Calling async method on button click WAITING at sun.misc.Unsafe.park(Native Method) How to use background thread in swift? What is the use of static synchronized method in java? Locking pattern for proper use of .NET MemoryCache

Examples related to concurrency

WAITING at sun.misc.Unsafe.park(Native Method) What is the Swift equivalent to Objective-C's "@synchronized"? Custom thread pool in Java 8 parallel stream How to check if another instance of my shell script is running How to use the CancellationToken property? What's the difference between a Future and a Promise? Why use a ReentrantLock if one can use synchronized(this)? NSOperation vs Grand Central Dispatch What's the difference between Thread start() and Runnable run() multiprocessing.Pool: When to use apply, apply_async or map?

Examples related to java.util.concurrent

WAITING at sun.misc.Unsafe.park(Native Method) Is there a Mutex in Java? Synchronization vs Lock