Get hot threads

Base URL: /

GET /_node/hot_threads

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 · default: 10: The number of hot threads to return.
stacktrace_size integer · default: 50: The depth of the stack trace to report for each thread.
ignore_idle_threads boolean · default: true: If true, does not return idle threads.
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.

Response

Indicates a successful call

application/json

hot_threads object

View as Markdown

Base URL: /

Examples

Request curl 1 / 1 language

curl Shell

curl -X GET "${LOGSTASH_URL}/_node/hot_threads" \
  -u "${USERNAME}:${PASSWORD}"

Generated from the API spec

Response

{
  "hot_threads": {
    "time": "2025-01-06T18:25:28-07:00",
    "busiest_threads": 3,
    "threads": [
      {
        "name": "Ruby-0-Thread-7",
        "thread_id": 37,
        "percent_of_cpu_time": 0,
        "state": "timed_waiting",
        "traces": [
          "java.lang.Object.wait(Native Method)",
          "org.jruby.RubyThread.sleep(RubyThread.java:1002)",
          "org.jruby.RubyKernel.sleep(RubyKernel.java:803)"
        ]
      },
      {
        "name": "[test2]\u003Eworker3",
        "thread_id": 10,
        "percent_of_cpu_time": 0.85,
        "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)"
        ]
      },
      {
        "name": "[test2]\u003Eworker2",
        "thread_id": 11,
        "percent_of_cpu_time": 0.85,
        "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)"
        ]
      }
    ]
  }
}