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[fix] ScheduledExecutors use daemon threads, to avoid blocking shutdowns #989

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Mar 26, 2019
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[fix] ScheduledExecutors use daemon threads, to avoid blocking shutdowns #989

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b789d38
ScheduledExecutors use daemon threads
Mar 19, 2019
f340a83
One more daemon
iamdanfox Mar 26, 2019
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4 changes: 2 additions & 2 deletions okhttp-clients/src/main/java/com/palantir/conjure/java/okhttp/OkHttpClients.java
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Expand Up @@ -111,10 +111,10 @@ public final class OkHttpClients {
* <p>
* Note: In contrast to the {@link java.util.concurrent.ThreadPoolExecutor} used by OkHttp's {@link
* #executionExecutor}, {@code corePoolSize} must not be zero for a {@link ScheduledThreadPoolExecutor}, see its
* Javadoc.
* Javadoc. Since this executor will never hit zero threads, it must use daemon threads.
*/
private static final ScheduledExecutorService schedulingExecutor = Tracers.wrap(Executors.newScheduledThreadPool(
NUM_SCHEDULING_THREADS, Util.threadFactory("conjure-java-runtime/OkHttp Scheduler", false)));
NUM_SCHEDULING_THREADS, Util.threadFactory("conjure-java-runtime/OkHttp Scheduler", true)));
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there are other executors in this class; you probably want to daemonize all of them!

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maybe, but this is the one that is causing me troubles

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Please either update all executors, or add comments describing why they need to use non-daemon threads

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ok, better?

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Why doesn't this apply to the cached executor which also uses non-daemon threads? If anything has made a remote call I imagine that would block shutdown for a full minute as well even if actions are not running.

If we haven't made calls using conjure-java-runtiem clients, it's odd that we would create this executor. Should creation of these executors be deferred until a client is created using memoized suppliers?


private OkHttpClients() {}

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