linux_ja的专栏

1，下载storm-starter-0.0.1-SNAPSHOT-jar-with-dependencies.jar：http://pan.baidu.com/s/1jGzddX02，copy storm-starter-0.0.1-SNAPSHOT-jar-with-dependencies.jar到

1、Thread-4-kafkaSpout-EventThread线程处于长时间等待状态，是正常行为，该线程的作用：      一开始就进入无限循环，从队列waitingEvents中获取事件，如果没有就阻塞等待2、Thread-4-kafkaSpout-SendThread，该线程的作用：     是个IO线程，用于发起和接受请求，并处理相应，同时产生心跳信息 3、Threa

配置JMX监控，可以查看GC和线程等等信息，方便debug，以下是在sorm.yaml文件中配置参数配置，%ID%取的时每个work的进程号，因为一个节点上可以有多个work，所以防止端口号重复导致启动失败，所以用动态代替worker.childopts: "-Xmx2048m -Xms2048m -Xmn500m -XX:PermSize=256M -XX:MaxPermSi

如果toplogy在debug模式下，如果发现__tick打印，则是ack超时导致的，如果打印__ack_fail打印则是消息fail导致的分别对应的变量backtype.storm.SYSTEM_TICK_STREAM_ID = "__tick";(def ACKER-FAIL-STREAM-ID "__ack_fail")

org.apache.storm.zookeeper.server.NIOServerCnxnFactory - Thread Thread[main,5,main] diedjava.lang.RuntimeException: java.io.NotSerializableException: java.io.BufferedWriter at backtype.storm.seriali

2015-01-09T16:17:10.090+0800 s.k.KafkaUtils [WARN] Network error when fetching messages:java.net.ConnectException: Connection refused at sun.nio.ch.Net.connect0(Native Method) ~[na:1.7.0_51]

20391 [Thread-8-kfkaSpout] WARN storm.kafka.KafkaUtils - Got fetch request with offset out of range: [140885176]; retrying with default start offset time from configuration. configured start offset t

1,spout编写,读取文件内容：

strom异常解决：[ConnectionStateManager-0] WARN  org.apache.curator.framework.state.ConnectionStateManager - There are no ConnectionStateListeners registered.

storm单机部署环境：centos，jdk1

storm诡异问题查找：一个经常容易报的异常：Exception in thread "main" org.apache.thrift7.transport.TTransportException: java.net.ConnectException: Connection timed out at org.apache.thrift7.transport.TSocket.open(TS