javaapache-stormstream-processing

How to programmatically kill a Apache Storm topology?

I am using a Java class to submit a topology to a Storm cluster and I also plan to use a Java class to kill the topology. But as per storm documentation, the following command is used to kill a topology and there is no Java method (and this has valid reasons).

storm kill {stormname}

So is it fine to call a shell script from Java class to kill the topology? What are the other ways to kill topology?

Also, how to get the status of running topologies in storm cluster?

Solution

  • For killing topology you can try this 

    import backtype.storm.generated.KillOptions
import backtype.storm.generated.Nimbus.Client;
import backtype.storm.utils.NimbusClient
import backtype.storm.utils.Utils

Map conf = Utils.readStormConfig();
Client client = NimbusClient.getConfiguredClient(conf).getClient();
KillOptions killOpts = new KillOptions();
//killOpts.set_wait_secs(waitSeconds); // time to wait before killing
client.killTopologyWithOpts(topology_name, killOpts); //provide topology name

    To get the status of topology running

    Client client = NimbusClient.getConfiguredClient(conf).getClient();
List<TopologySummary> topologyList = client.getClusterInfo.get_topologies();
// loop through the list and check if the required topology name is present in the list
// if not it's not running