我有一个风暴拓扑，我会这样做：setNumWorkers(1);
当我查看有关此运行拓扑的风暴UI报告时，我看到Num worker设置为1。
但是，当我登录运行主管的节点时，我看到两个进程对-Dworker.id和-Dworker.port具有相同的设置。
我在下面列出了ps向我展示这两个流程的输出。
我的问题是：如果我只请求一个进程，为什么有两个进程似乎被配置为工作进程（注意：Storm UI确认我只有一个worker。）
这对我很重要，因为当我对拓扑所消耗的资源进行任何分析或分析时，我想知道哪个进程为零。
ps输出
root 787 20.0 0.6 5858228 78388 ? Sl 05:04 0:00 /usr/lib/jvm/java-8-openjdk-amd64/bin/java -cp /opt/apache-storm-0.10.0/lib/log4j-slf4j-impl-2.1.jar:/opt/apache-storm-0.10.0/lib/servlet-api-2.5.jar:/opt/apache-storm-0.10.0/lib/clojure-1.6.0.jar:/opt/apache-storm-0.10.0/lib/slf4j-api-1.7.7.jar:/opt/apache-storm-0.10.0/lib/hadoop-auth-2.4.0.jar:/opt/apache-storm-0.10.0/lib/log4j-api-2.1.jar:/opt/apache-storm-0.10.0/lib/disruptor-2.10.4.jar:/opt/apache-storm-0.10.0/lib/storm-core-0.10.0.jar:/opt/apache-storm-0.10.0/lib/log4j-over-slf4j-1.6.6.jar:/opt/apache-storm-0.10.0/lib/log4j-core-2.1.jar:/opt/apache-storm-0.10.0/lib/asm-4.0.jar:/opt/apache-storm-0.10.0/lib/kryo-2.21.jar:/opt/apache-storm-0.10.0/lib/reflectasm-1.07-shaded.jar:/opt/apache-storm-0.10.0/lib/minlog-1.2.jar:/opt/apache-storm-0.10.0/conf:/opt/apache-storm-0.10.0/storm-local/supervisor/stormdist/big-storm-job-1-1487739502/stormjar.jar -Dlogfile.name=big-storm-job-1-1487739502-worker-6700.log -Dstorm.home=/opt/apache-storm-0.10.0 -Dstorm.id=big-storm-job-1-1487739502 -Dworker.id=e8e03e95-1fcc-492a-b5e4-51ef7b8db2ee -Dworker.port=6700 -Dstorm.log.dir=/opt/apache-storm-0.10.0/logs -Dlog4j.configurationFile=/opt/apache-storm-0.10.0/log4j2/worker.xml backtype.storm.LogWriter /usr/lib/jvm/java-8-openjdk-amd64/bin/java -server -Xmx768m -Djava.library.path=/opt/apache-storm-0.10.0/storm-local/supervisor/stormdist/big-storm-job-1-1487739502/resources/Linux-amd64:/opt/apache-storm-0.10.0/storm-local/supervisor/stormdist/big-storm-job-1-1487739502/resources:/usr/local/lib:/opt/local/lib:/usr/lib -Dlogfile.name=big-storm-job-1-1487739502-worker-6700.log -Dstorm.home=/opt/apache-storm-0.10.0 -Dstorm.conf.file= -Dstorm.options= -Dstorm.log.dir=/opt/apache-storm-0.10.0/logs -Dlogging.sensitivity=S3 -Dlog4j.configurationFile=/opt/apache-storm-0.10.0/log4j2/worker.xml -Dstorm.id=big-storm-job-1-1487739502 -Dworker.id=e8e03e95-1fcc-492a-b5e4-51ef7b8db2ee -Dworker.port=6700 -cp /opt/apache-storm-0.10.0/lib/log4j-slf4j-impl-2.1.jar:/opt/apache-storm-0.10.0/lib/servlet-api-2.5.jar:/opt/apache-storm-0.10.0/lib/clojure-1.6.0.jar:/opt/apache-storm-0.10.0/lib/slf4j-api-1.7.7.jar:/opt/apache-storm-0.10.0/lib/hadoop-auth-2.4.0.jar:/opt/apache-storm-0.10.0/lib/log4j-api-2.1.jar:/opt/apache-storm-0.10.0/lib/disruptor-2.10.4.jar:/opt/apache-storm-0.10.0/lib/storm-core-0.10.0.jar:/opt/apache-storm-0.10.0/lib/log4j-over-slf4j-1.6.6.jar:/opt/apache-storm-0.10.0/lib/log4j-core-2.1.jar:/opt/apache-storm-0.10.0/lib/asm-4.0.jar:/opt/apache-storm-0.10.0/lib/kryo-2.21.jar:/opt/apache-storm-0.10.0/lib/reflectasm-1.07-shaded.jar:/opt/apache-storm-0.10.0/lib/minlog-1.2.jar:/opt/apache-storm-0.10.0/conf:/opt/apache-storm-0.10.0/storm-local/supervisor/stormdist/big-storm-job-1-1487739502/stormjar.jar backtype.storm.daemon.worker big-storm-job-1-1487739502 8fde2226-4b32-406d-8809-81ed88e5ae1f 6700 e8e03e95-1fcc-492a-b5e4-51ef7b8db2ee
root 805 203 2.0 4308648 255336 ? Sl 05:04 0:06 /usr/lib/jvm/java-8-openjdk-amd64/bin/java -server -Xmx768m -Djava.library.path=/opt/apache-storm-0.10.0/storm-local/supervisor/stormdist/big-storm-job-1-1487739502/resources/Linux-amd64:/opt/apache-storm-0.10.0/storm-local/supervisor/stormdist/big-storm-job-1-1487739502/resources:/usr/local/lib:/opt/local/lib:/usr/lib -Dlogfile.name=big-storm-job-1-1487739502-worker-6700.log -Dstorm.home=/opt/apache-storm-0.10.0 -Dstorm.conf.file= -Dstorm.options= -Dstorm.log.dir=/opt/apache-storm-0.10.0/logs -Dlogging.sensitivity=S3 -Dlog4j.configurationFile=/opt/apache-storm-0.10.0/log4j2/worker.xml -Dstorm.id=big-storm-job-1-1487739502 -Dworker.id=e8e03e95-1fcc-492a-b5e4-51ef7b8db2ee -Dworker.port=6700 -cp /opt/apache-storm-0.10.0/lib/log4j-slf4j-impl-2.1.jar:/opt/apache-storm-0.10.0/lib/servlet-api-2.5.jar:/opt/apache-storm-0.10.0/lib/clojure-1.6.0.jar:/opt/apache-storm-0.10.0/lib/slf4j-api-1.7.7.jar:/opt/apache-storm-0.10.0/lib/hadoop-auth-2.4.0.jar:/opt/apache-storm-0.10.0/lib/log4j-api-2.1.jar:/opt/apache-storm-0.10.0/lib/disruptor-2.10.4.jar:/opt/apache-storm-0.10.0/lib/storm-core-0.10.0.jar:/opt/apache-storm-0.10.0/lib/log4j-over-slf4j-1.6.6.jar:/opt/apache-storm-0.10.0/lib/log4j-core-2.1.jar:/opt/apache-storm-0.10.0/lib/asm-4.0.jar:/opt/apache-storm-0.10.0/lib/kryo-2.21.jar:/opt/apache-storm-0.10.0/lib/reflectasm-1.07-shaded.jar:/opt/apache-storm-0.10.0/lib/minlog-1.2.jar:/opt/apache-storm-0.10.0/conf:/opt/apache-storm-0.10.0/storm-local/supervisor/stormdist/big-storm-job-1-1487739502/stormjar.jar backtype.storm.daemon.worker big-storm-job-1-1487739502 8fde2226-4b32-406d-8809-81ed88e5ae1f 6700 e8e03e95-1fcc-492a-b5e4-51ef7b8db2ee
以防万一阅读此内容有助于更好地了解我的环境，以下是Storm（以及其他内容）的Docker配置。希望这会有所帮助。
version: '2'
services:
zookeeper:
image: wurstmeister/zookeeper
container_name: zk
hostname: zk
ports:
- "2181:2181"
networks:
storm:
kafka:
image: wurstmeister/kafka:0.8.2.2-1
container_name: kafka
hostname: kafka
ports:
- "9092:9092"
environment:
KAFKA_BROKER_ID: 1
KAFKA_ADVERTISED_HOST_NAME: 10.211.55.4
KAFKA_ZOOKEEPER_CONNECT: 10.211.55.4
volumes:
- /var/run/docker.sock:/var/run/docker.sock
nimbus:
image: sunside/storm-nimbus
container_name: storm-nimbus
hostname: storm-nimbus
ports:
- "49773:49772"
- "49772:49773"
- "49627:49627"
environment:
- "LOCAL_HOSTNAME=nimbus"
- "ZOOKEEPER_ADDRESS=zk"
- "ZOOKEEPER_PORT=2181"
- "NIMBUS_ADDRESS=nimbus"
- "NIMBUS_THRIFT_PORT=49627"
- "DRPC_PORT=49772"
- "DRPCI_PORT=49773"
volumes:
- /media/psf/Home/dev/storm-pipeline:/pipeline
networks:
storm:
supervisor:
image: sunside/storm-supervisor
container_name: storm-supervisor
hostname: storm-supervisor
ports:
- "8000:8000"
environment:
- "LOCAL_HOSTNAME=supervisor"
- "NIMBUS_ADDRESS=nimbus"
- "NIMBUS_THRIFT_PORT=49627"
- "DRPC_PORT=49772"
- "DRPCI_PORT=49773"
- "ZOOKEEPER_ADDRESS=zk"
- "ZOOKEEPER_PORT=2181"
networks:
storm:
ui:
image: sunside/storm-ui
container_name: storm-ui
hostname: storm-ui
ports:
- "8888:8080"
environment:
- "LOCAL_HOSTNAME=ui"
- "NIMBUS_ADDRESS=nimbus"
- "NIMBUS_THRIFT_PORT=49627"
- "DRPC_PORT=49772"
- "DPRCI_PORT=49773"
- "ZOOKEEPER_ADDRESS=zk"
- "ZOOKEEPER_PORT=2181"
networks:
storm:
elasticsearch:
image: elasticsearch:2.3
container_name: elasticsearch
hostname: elasticsearch
ports:
- "9200:9200"
networks:
storm:
networks:
storm:
external: true
答案 0 :(得分：1)
这个谜的答案是两个过程中的一个是真正的“工人”过程（正在执行的类是backtype.storm.daemon.worker）...打印出来的另一个过程响应'ps'命令是一个日志编写器进程，由类backtype.storm.LogWriter执行。
我应该在两个进程的输出行中注意到这一点。哦，好吧......现在我们知道了！