How to change thread name in java

Change thread name

To simplify log reading and thread dumping, the name of the thread can be customized. This can be accomplished by using a ThreadFactory when creating ExecutorService. There are many implementations of the ThreadFactory interface in popular utility libraries:

com.google.common.util.concurrent.ThreadFactoryBuilde+r in Guava. 
org.springframework.scheduling.concurrent.CustomizableThreadFactory in Spring. 
org.apache.commons.lang3.concurrent.BasicThreadFactory in Apache Commons Lang 3.

ThreadFactory threadFactory = new BasicThreadFactory.Builder()
 .namingPattern("computation-thread-%d")
 .build();
ExecutorService executorService = Executors.newFixedThreadPool(numberOfThreads, threadFactory);

Although ForkJoinPool does not use the ThreadFactory interface, it also supports the renaming of threads:

ForkJoinPool.ForkJoinWorkerThreadFactory forkJoinThreadFactory = pool -> { 
 ForkJoinWorkerThread thread = ForkJoinPool.defaultForkJoinWorkerThreadFactory.newThread(pool); 
 thread.setName("computation-thread-" + thread.getPoolIndex()); 
 return thread;
};
ForkJoinPool forkJoinPool = new ForkJoinPool(numberOfThreads, forkJoinThreadFactory, null, false);

Convert thread dumps to the default Compare naming:

"pool-1-thread-3" #14 prio=5 os_prio=31 tid=0x00007fc06b19f000 nid=0x5703 runnable [0x0000700001ff9000]
 java.lang.Thread.State: RUNNABLE
at com.github.sorokinigor.article.tipsaboutconcurrency.setthreadsname.TaskHandler.compute(TaskHandler.java:16)
...
"pool-2-thread-3" #15 prio=5 os_prio=31 tid=0x00007fc06aa10800 nid=0x5903 runnable [0x00007000020fc000]
 java.lang.Thread.State: RUNNABLE
at com.github.sorokinigor.article.tipsaboutconcurrency.setthreadsname.HealthCheckCallback.recordFailure(HealthChecker.java:21)
at com.github.sorokinigor.article.tipsaboutconcurrency.setthreadsname.HealthChecker.check(HealthChecker.java:9)
...
"pool-1-thread-2" #12 prio=5 os_prio=31 tid=0x00007fc06aa10000 nid=0x5303 runnable [0x0000700001df3000]
 java.lang.Thread.State: RUNNABLE
at com.github.sorokinigor.article.tipsaboutconcurrency.setthreadsname.TaskHandler.compute(TaskHandler.java:16)
 ...

Compare with custom naming:

"task-handler-thread-1" #14 prio=5 os_prio=31 tid=0x00007fb49c9df000 nid=0x5703 runnable [0x000070000334a000]
 java.lang.Thread.State: RUNNABLE
at com.github.sorokinigor.article.tipsaboutconcurrency.setthreadsname.TaskHandler.compute(TaskHandler.java:16)
...
"authentication-service-ping-thread-0" #15 prio=5 os_prio=31 tid=0x00007fb49c9de000 nid=0x5903 runnable [0x0000700003247000]
 java.lang.Thread.State: RUNNABLE
at com.github.sorokinigor.article.tipsaboutconcurrency.setthreadsname.HealthCheckCallback.recordFailure(HealthChecker.java:21)
at com.github.sorokinigor.article.tipsaboutconcurrency.setthreadsname.HealthChecker.check(HealthChecker.java:9)
...
"task-handler-thread-0" #12 prio=5 os_prio=31 tid=0x00007fb49b9b5000 nid=0x5303 runnable [0x0000700003144000]
 java.lang.Thread.State: RUNNABLE
at com.github.sorokinigor.article.tipsaboutconcurrency.setthreadsname.TaskHandler.compute(TaskHandler.java:16)
 ...

Imagine, there may be more than 3 threads.

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