Shutdown Hook一、概述1.JVM会响应关闭自己的两种Event (1)应用程序调用System.exit方法或最后一个非守护进程non-daemon退出 (2)用户在关java程序之前,突然强制关机,比如CTRL+C或者注销系统2.JVM为shuttingdown提供了两段式处理流程 (1)JVM会和所有注册过的shutdown hooks一起启动。这些注册的 ...
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It's just a flag in the Thread object. The JVM will continue to run only as long as non-daemon threads exist. As soon as the only running threads have the daemon property set, the JVM will exit. That's it -- nothing more. [Jess in Action][AskingGoodQuestions]A...
java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000000d7017420> (a com.liang.java.thinkinginjava.concurency.waxomatic.Car) at java.lang.Object.wait(Object.java:502) at com.liang.java.thinkinginjava.concurency.waxomatic.Car.wait...
stream: [default] of component [kafka_spout]Exception in thread "main" java.lang.RuntimeException: InvalidTopologyException(msg:Component: [mybolt] subscribes from non-existent stream: [default] of component [kafka_spout])at org.apache.storm.StormSubmitter.submitTopologyAs(StormSubmitter.java:273)...
ERROR [ResourceDiscoveryComponent.invoker.daemon-1] (rhq.modules.plugins.jbossas7.HostControllerDiscovery)- Discovery of a JBossAS7 Host Controller Resource failed for process: pid=[30641], name=[/etc/alternatives/java_sdk/bin/java], ppid=[30619]. java.lang.IllegalArgumentException: Invalid port...
CP_THREAD_ACP. Using CP_THREAD_ACP was introduced in JDK-8240197 and JDK-8240725, however only JDK-8240197 has been backported to 11u. So I want to apply original bug to 11u partially. I've sent RFA to jdk-updates-dev: https://mail.openjdk.java.net/pipermail/jdk-updates-dev/2020-...
(PartitionManager.java:149) ~[storm-kafka-1.0.1.2.5.3.0-37.jar:1.0.1.2.5.3.0-37] at org.apache.storm.kafka.KafkaSpout.nextTuple(KafkaSpout.java:136) ~[storm-kafka-1.0.1.2.5.3.0-37.jar:1.0.1.2.5.3.0-37] at org.apache.storm.daemon.executor$fn__5192$fn__5207$fn__52...
And even if I do the cleanup suggested in what you linked @dave-r12, the behavior didn't change, because of new Thread(readerRunnable).start(); // Not a daemon thread. that creates that non-daemon thread that prevents the JVM from shutting down. while the docs you linked say OkHttp ...
In Barrier Execution Mode, Spark driver JVM could hang around after calling spark.stop(). Although the Spark Context was shutdown, the JVM was still running. The reason was that there is a non-daemon timer thread named BarrierCoordinator barrier epoch increment timer, which prevented the driver...