Get hot threads

GET /_node/hot_threads
Basic auth

Get information about current hot threads for Logstash. A hot thread is a Java thread that has high CPU usage and takes longer than normal to execute.

Query parameters

  • threads integer

    The number of hot threads to return.

    Default value is 10.

  • stacktrace_size integer

    The depth of the stack trace to report for each thread.

    Default value is 50.

  • ignore_idle_threads boolean

    If true, does not return idle threads.

    Default value is true.

  • pretty boolean

    If you append ?pretty=true to the request, the JSON returned will be pretty formatted. Use it for debugging only!

  • human boolean

    If you append ?human=true to the request, the JSON returned will be in a human-readable format.

Responses

  • 200 application/json

    Indicates a successful call

    Hide response attribute Show response attribute object
    • hot_threads object
      Hide hot_threads attributes Show hot_threads attributes object
      • time string
      • busiest_threads integer
      • threads array[object]
        Hide threads attributes Show threads attributes object
        • name string
        • thread_id integer
        • percent_of_cpu_time number(double)
        • state string
        • traces array[string]
GET /_node/hot_threads 
curl \ --request GET 'http://api.example.com/_node/hot_threads' \ --user "username:password"
Response examples (200) 
{ "hot_threads": { "time": "2025-01-06T18:25:28-07:00", "threads": [ { "name": "Ruby-0-Thread-7", "state": "timed_waiting", "traces": [ "java.lang.Object.wait(Native Method)", "org.jruby.RubyThread.sleep(RubyThread.java:1002)", "org.jruby.RubyKernel.sleep(RubyKernel.java:803)" ], "thread_id": 37, "percent_of_cpu_time": 0.0 }, { "name": "[test2]>worker3", "state": "waiting", "traces": [ "sun.misc.Unsafe.park(Native Method)", "java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)", "java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)" ], "thread_id": 10, "percent_of_cpu_time": 0.85 }, { "name": "[test2]>worker2", "state": "runnable", "traces": [ "org.jruby.RubyClass.allocate(RubyClass.java:225)", "org.jruby.RubyClass.newInstance(RubyClass.java:856)", "org.jruby.RubyClass$INVOKER$i$newInstance.call(RubyClass$INVOKER$i$newInstance.gen)" ], "thread_id": 11, "percent_of_cpu_time": 0.85 } ], "busiest_threads": 3 } }