zyllt edited a comment on issue #6589: Can not use Context#Counter in function URL: https://github.com/apache/pulsar/issues/6589#issuecomment-604259667 @sijie thanks for your reply. I deploy the pulsar cluster on bare metal.my cluster has five machines.Two of them have brokers and three have bookies.local-zk and configuration-store deployed on all machines.I started `functions-woker` within `brokers` use `Thread Runtime`. At the beginning I started a demo-function named `WordCountFunction`,then i trigger it and broker log outputs a exception.  According to the exception messages, I looked at the source code and found that using the `Function# Context#stateContext` requires starting a `StreamStorage` component. I first started this component in a single bookie use `extraServerComponents=org.apache.bookkeeper.stream.server.StreamStorageLifecycleComponent`. The Booki Log shows a successful start.And I use `netstat -ant | grep -i listen ｜ grep 4181` command to see that port 4181 is already listening at `0.0.0.0`. In the configuration file `functions_worker.yml ` I set the `stateStorageServiceUrl` configuration to ` bk://10.1.0.112:4181`.that is IP of bookie. After restarting the broker I deleted the demo-function `WordCountFunction` I created earlier and recreated it again.But when I check the logs, I find that the startup of the demo-function is parked. I use command of `pulsar-admin functions trigger`,prompt me function does not exist. ``` 19:27:11.455 [test/test-namespace/WordCountFunction-0] INFO org.apache.pulsar.functions.instance.JavaInstanceRunnable - Load JAR: /usr/local/pulsar-2.5.0/download/pulsar_functions/test/test-namespace/WordCountFunction/0/pulsar-functions-api-examples.jar 19:27:11.467 [test/test-namespace/WordCountFunction-0] INFO org.apache.pulsar.functions.instance.JavaInstanceRunnable - Initialize function class loader for function WordCountFunction at function cache manager 19:27:11.920 [client-scheduler-OrderedScheduler-0-0] INFO org.apache.bookkeeper.clients.impl.channel.StorageServerChannelManager - Added range server (hostname: "127.0.0.1" port: 4181 ) into the channel manager. ``` I suspect it may be a problem with this `Added range server (hostname: "127.0.0.1" port: 4181) `, because `StreamStorageServer` is on another machine, but I have configured the correct `stateStorageServiceUrl` in `functions_worker.yml `. I think that the hostname should be obtained in zk according to the source code, and then I connected to local-zk to check `ls /stream/servers/available` path found that the output is `[127.0.0.1:4181]`. I think it may be that the real IP address cannot be obtained when registering for zk,but I cannot confirm whether this problem is caused. Then I started an independent functions-worker on the bookie machine, and then started the demo-function and trigger it,then i found that everything was normal. I tested other cases,you can see here. https://github.com/apache/bookkeeper/issues/2216#issuecomment-602995573
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