Getting a NPE leading worker to die when starting a topology.

I am using storm-core and storm-kafka-client version 1.2.1 and kafka clients version 1.1.0.

We have an external kafka from where we get the messages.
Whenever I try to run the topology, I get a NPE, which leads to the worker getting died.
If I set poll strategy to earliest and the topic already contains some messages, it works fine.
I have used a custom record translator which is working fine.

Can someone please help me fix the issue?

Thanks.

 

Error - 

10665 [Thread-58-spout-handle-rule-local-kafka-spout-executor[26 26]] ERROR o.a.s.util - Async loop died!
java.lang.RuntimeException: java.lang.NullPointerException
at org.apache.storm.utils.DisruptorQueue.consumeBatchToCursor(DisruptorQueue.java:522) ~[storm-core-1.2.1.jar:1.2.1]
at org.apache.storm.utils.DisruptorQueue.consumeBatchWhenAvailable(DisruptorQueue.java:487) ~[storm-core-1.2.1.jar:1.2.1]
at org.apache.storm.disruptor$consume_batch_when_available.invoke(disruptor.clj:74) ~[storm-core-1.2.1.jar:1.2.1]
at org.apache.storm.daemon.executor$fn_5043$fn5056$fn_5109.invoke(executor.clj:861) ~[storm-core-1.2.1.jar:1.2.1]
at org.apache.storm.util$async_loop$fn__557.invoke(util.clj:484) [storm-core-1.2.1.jar:1.2.1]
at clojure.lang.AFn.run(AFn.java:22) [clojure-1.7.0.jar:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]
Caused by: java.lang.NullPointerException
at org.apache.storm.kafka.spout.trident.KafkaTridentSpoutEmitter.seek(KafkaTridentSpoutEmitter.java:193) ~[storm-kafka-client-1.2.1.jar:1.2.1]
at org.apache.storm.kafka.spout.trident.KafkaTridentSpoutEmitter.emitPartitionBatch(KafkaTridentSpoutEmitter.java:127) ~[storm-kafka-client-1.2.1.jar:1.2.1]
at org.apache.storm.kafka.spout.trident.KafkaTridentSpoutEmitter.emitPartitionBatch(KafkaTridentSpoutEmitter.java:51) ~[storm-kafka-client-1.2.1.jar:1.2.1]
at org.apache.storm.trident.spout.OpaquePartitionedTridentSpoutExecutor$Emitter.emitBatch(OpaquePartitionedTridentSpoutExecutor.java:141) ~[storm-core-1.2.1.jar:1.2.1]
at org.apache.storm.trident.spout.TridentSpoutExecutor.execute(TridentSpoutExecutor.java:82) ~[storm-core-1.2.1.jar:1.2.1]
at org.apache.storm.trident.topology.TridentBoltExecutor.execute(TridentBoltExecutor.java:383) ~[storm-core-1.2.1.jar:1.2.1]
at org.apache.storm.daemon.executor$fn_5043$tuple_action_fn_5045.invoke(executor.clj:739) ~[storm-core-1.2.1.jar:1.2.1]
at org.apache.storm.daemon.executor$mk_task_receiver$fn__4964.invoke(executor.clj:468) ~[storm-core-1.2.1.jar:1.2.1]
at org.apache.storm.disruptor$clojure_handler$reify__4475.onEvent(disruptor.clj:41) ~[storm-core-1.2.1.jar:1.2.1]
at org.apache.storm.utils.DisruptorQueue.consumeBatchToCursor(DisruptorQueue.java:509) ~[storm-core-1.2.1.jar:1.2.1]
... 6 more

 

 

Topology class - 

 

 

 

 

import org.apache.storm.Config;
import org.apache.storm.LocalCluster;
import org.apache.storm.StormSubmitter;
import org.apache.storm.generated.*;
import org.apache.storm.kafka.spout.KafkaSpoutConfig;
import org.apache.storm.kafka.spout.trident.KafkaTridentSpoutOpaque;
import org.apache.storm.trident.Stream;
import org.apache.storm.trident.TridentState;
import org.apache.storm.trident.TridentTopology;
import org.apache.storm.tuple.Fields;

import java.util.Properties;

 

public class TestTopology {

 

private static StormTopology buildTopology(Properties stormProperties)

{ Properties kafkaProperties = getProperties("/kafka.properties"); TridentTopology topology = new TridentTopology(); Fields stageArguments = new Fields("test", "issue"); KafkaSpoutConfig<String, String> kafkaSpoutConfig = KafkaSpoutConfig.builder(kafkaProperties.getProperty("bootstrap.servers"), "test") .setFirstPollOffsetStrategy(KafkaSpoutConfig.FirstPollOffsetStrategy.LATEST) .setProcessingGuarantee(KafkaSpoutConfig.ProcessingGuarantee.AT_MOST_ONCE) .setRecordTranslator(new RecordTranslator(), stageArguments) .build(); KafkaTridentSpoutOpaque kafkaTridentSpoutOpaque = new KafkaTridentSpoutOpaque(kafkaSpoutConfig); Grouping partitionGroup = getPartitionGroup("test"); log.info("Creating Opaque-Trident-Kafka-Spout"); final Stream kafkaSpout = topology.newStream(stormProperties.getProperty("SPOUT_NAME"), kafkaTridentSpoutOpaque).name("kafkaSpout").parallelismHint(1); TridentState testUpdate = kafkaSpout.partition(partitionGroup).name("testUpdate").partitionPersist(new MainMemoryStateFactory(), stageArguments, new MainMemoryStateUpdater(), stageArguments).parallelismHint(1); Stream viewUpdate = ruleUpdate.newValuesStream().name("viewUpdate").partition(partitionGroup).each(stageArguments, new UpdateView(), new Fields()).parallelismHint(2); return topology.build(); }

public static void main(String[] args) {
Config conf = new Config();
log.info("Topology config: " + conf);
Properties properties = getProperties("/storm-cluster.properties");

conf.setMessageTimeoutSecs(600);

log.info("Building Topology");
StormTopology topology = buildTopology(properties);
log.info(topology.toString());

log.info("Submitting handle-rule Topology");
try

{ LocalCluster cluster = new LocalCluster(); cluster.submitTopology("handle-rule", conf, topology); }

catch (Exception e)

{ e.printStackTrace(); }

}

}