how to start realtime node in Druid

[JLLNANA]

Druid version is: druid-0.10.0

In the package of druid, the folder named conf/druid only has the configuration of nodes(broker,_common, coordinator,historical,middleManager and overlord) without realtime configuration.
When i cp historical configurations to realtime configuration and modify some parameters.
The settings in runtime.properties like this:
druid.service=druid/realtime
druid.port=8084

HTTP server threads

druid.server.http.numThreads=9

Processing threads and buffers

druid.processing.buffer.sizeBytes=256000000
druid.processing.numThreads=2

Segment storage

#druid.segmentCache.locations=[{"path":"var/druid/segment-cache","maxSize":300000000000}]
druid.segmentCache.locations=[{"path":"/data0/druid_var/segment-cache","maxSize":300000000000}]
druid.server.maxSize=300000000000
~
and then start realtime node using the command like this:
java -Xmx256m -Duser.timezone=UTC -Dfile.encoding=UTF-8 cat conf-quickstart/druid/realtime/jvm.config | xargs -cp "conf-quickstart/druid/_common:conf-quickstart/druid/realtime:lib/*" io.druid.cli.Main server realtime

Then error

2017-08-17T03:19:04,105 ERROR [main] io.druid.cli.CliRealtime - Error when starting up. Failing.
com.google.inject.ProvisionException: Unable to provision, see the following errors:

1. Error injecting constructor, java.lang.NullPointerException
   at io.druid.guice.FireDepartmentsProvider.(FireDepartmentsProvider.java:43)
   while locating io.druid.guice.FireDepartmentsProvider
   at io.druid.guice.RealtimeModule.configure(RealtimeModule.java:86) (via modules: com.google.inject.util.Modules$OverrideModule -> com.google.inject.util.Modules$OverrideModule -> io.druid.guice.RealtimeModule)
   while locating java.util.List<io.druid.segment.realtime.FireDepartment>
   for the 1st parameter of io.druid.segment.realtime.RealtimeManager.(RealtimeManager.java:80)
   while locating io.druid.segment.realtime.RealtimeManager
   at io.druid.guice.RealtimeModule.configure(RealtimeModule.java:103) (via modules: com.google.inject.util.Modules$OverrideModule -> com.google.inject.util.Modules$OverrideModule -> io.druid.guice.RealtimeModule)
   while locating io.druid.query.QuerySegmentWalker
   for the 5th parameter of io.druid.server.QueryResource.(QueryResource.java:118)
   while locating io.druid.server.QueryResource

1 error
at com.google.inject.internal.InjectorImpl$2.get(InjectorImpl.java:1028) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1050) ~[guice-4.1.0.jar:?]
at io.druid.guice.LifecycleModule$2.start(LifecycleModule.java:154) ~[druid-api-0.10.0.jar:0.10.0]
at io.druid.cli.GuiceRunnable.initLifecycle(GuiceRunnable.java:102) [druid-services-0.10.0.jar:0.10.0]
at io.druid.cli.ServerRunnable.run(ServerRunnable.java:41) [druid-services-0.10.0.jar:0.10.0]
at io.druid.cli.Main.main(Main.java:108) [druid-services-0.10.0.jar:0.10.0]
Caused by: java.lang.NullPointerException
at java.io.FileInputStream.(FileInputStream.java:130) ~[?:1.8.0_131]
at com.fasterxml.jackson.core.JsonFactory.createParser(JsonFactory.java:708) ~[jackson-core-2.4.6.jar:2.4.6]
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2122) ~[jackson-databind-2.4.6.jar:2.4.6]
at io.druid.guice.FireDepartmentsProvider.(FireDepartmentsProvider.java:46) ~[druid-server-0.10.0.jar:0.10.0]
at io.druid.guice.FireDepartmentsProvider$$FastClassByGuice$$229da177.newInstance() ~[druid-server-0.10.0.jar:0.10.0]
at com.google.inject.internal.DefaultConstructionProxyFactory$FastClassProxy.newInstance(DefaultConstructionProxyFactory.java:89) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:111) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:90) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:268) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.BoundProviderFactory.get(BoundProviderFactory.java:61) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:46) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1092) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.SingletonScope$1.get(SingletonScope.java:194) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:41) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.SingleParameterInjector.inject(SingleParameterInjector.java:38) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.SingleParameterInjector.getAll(SingleParameterInjector.java:62) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:110) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:90) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:268) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.FactoryProxy.get(FactoryProxy.java:56) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:46) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1092) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40) ~[guice-4.1.0.jar:?]
at io.druid.guice.LifecycleScope$1.get(LifecycleScope.java:69) ~[druid-api-0.10.0.jar:0.10.0]
at com.google.inject.internal.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:41) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.SingleParameterInjector.inject(SingleParameterInjector.java:38) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.SingleParameterInjector.getAll(SingleParameterInjector.java:62) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:110) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:90) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:268) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.InjectorImpl$2$1.call(InjectorImpl.java:1019) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1085) ~[guice-4.1.0.jar:?]
at com.google.inject.internal.InjectorImpl$2.get(InjectorImpl.java:1015) ~[guice-4.1.0.jar:?]
... 5 more
^C

[jihoonson]

Hi @JLLNANA, have you had a chance to read the documents for streaming ingestion using realtime node? http://druid.io/docs/latest/ingestion/stream-pull.html and http://druid.io/docs/latest/configuration/realtime.html will be helpful for you. I guess something is missed in your realtime node configuration.

[pld]

@JLLNANA looks like your runtime.properties is missing the druid.realtime.specFile property and its value

[kgneng2]

@JLLNANA If you use tranquility, you don't need a realtime node.

Reference

https://github.com/druid-io/tranquility/blob/master/docs/overview.md#druid-setup

 To get started with the Druid indexing service, you'll need an Overlord, enough Middle Managers for your realtime workload, and enough historical nodes to receive handoffs.
 You don't need any realtime nodes, since Tranquility uses the indexing service for all of its ingestion needs.

[stale]

This issue has been marked as stale due to 280 days of inactivity. It will be closed in 2 weeks if no further activity occurs. If this issue is still relevant, please simply write any comment. Even if closed, you can still revive the issue at any time or discuss it on the dev@druid.apache.org list. Thank you for your contributions.