Hi Jawad,
Go through with following page
https://storm.apache.org/releases/current/Serialization.html
Regards,
Viraj Kadu
On Sat, 11 Nov, 2023, 1:19 am Jawad Tahir, <ranajawadta...@gmail.com> wrote:
> Hi all,
>
> I am developing an Apache Storm (v2.5.0) topology that reads events from a
> spout (`BaseRichSpout`), counts the number of events in tumbling windows
> (`BaseWindowedBolt`), and prints the count (`BaseRichBolt`). The topology
> works fine, but there are some out-of-order events in my dataset. The
> BaseWindowedBolt provides withLateTupleStream method to route late events
> to a separate stream. However, when I try to process late events, I get a
> serialization exception:
>
> ```
> `Caused by: com.esotericsoftware.kryo.KryoException:
> java.lang.IllegalArgumentException: Class is not registered:
> org.apache.storm.shade.com.google.common.collect.SingletonImmutableBiMap
> Note: To register this class use:
> kryo.register(org.apache.storm.shade.com.google.common.collect.SingletonImmutableBiMap.class);
> Serialization trace:
> defaultResources (org.apache.storm.task.WorkerTopologyContext)
> context (org.apache.storm.tuple.TupleImpl)
> at
> com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:101)
> ~[kryo-4.0.2.jar:?]
> at
> com.esotericsoftware.kryo.serializers.FieldSerializer.write(FieldSerializer.java:508)
> ~[kryo-4.0.2.jar:?]
> at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:575)
> ~[kryo-4.0.2.jar:?]
> at
> com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:79)
> ~[kryo-4.0.2.jar:?]
> at
> com.esotericsoftware.kryo.serializers.FieldSerializer.write(FieldSerializer.java:508)
> ~[kryo-4.0.2.jar:?]
> at com.esotericsoftware.kryo.Kryo.writeClassAndObject(Kryo.java:651)
> ~[kryo-4.0.2.jar:?]
> at
> com.esotericsoftware.kryo.serializers.CollectionSerializer.write(CollectionSerializer.java:100)
> ~[kryo-4.0.2.jar:?]
> at
> com.esotericsoftware.kryo.serializers.CollectionSerializer.write(CollectionSerializer.java:40)
> ~[kryo-4.0.2.jar:?]
> at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:557)
> ~[kryo-4.0.2.jar:?]
> at
> org.apache.storm.serialization.KryoValuesSerializer.serializeInto(KryoValuesSerializer.java:38)
> ~[storm-client-2.5.0.jar:2.5.0]
> at
> org.apache.storm.serialization.KryoTupleSerializer.serialize(KryoTupleSerializer.java:40)
> ~[storm-client-2.5.0.jar:2.5.0]
> at
> org.apache.storm.daemon.worker.WorkerState.checkSerialize(WorkerState.java:613)
> ~[storm-client-2.5.0.jar:2.5.0]
> at
> org.apache.storm.executor.ExecutorTransfer.tryTransferLocal(ExecutorTransfer.java:101)
> ~[storm-client-2.5.0.jar:2.5.0]
> at
> org.apache.storm.executor.ExecutorTransfer.tryTransfer(ExecutorTransfer.java:66)
> ~[storm-client-2.5.0.jar:2.5.0]
> at
> org.apache.storm.executor.LocalExecutor$1.tryTransfer(LocalExecutor.java:36)
> ~[storm-client-2.5.0.jar:2.5.0]
> at
> org.apache.storm.executor.bolt.BoltOutputCollectorImpl.boltEmit(BoltOutputCollectorImpl.java:112)
> ~[storm-client-2.5.0.jar:2.5.0]
> at
> org.apache.storm.executor.bolt.BoltOutputCollectorImpl.emit(BoltOutputCollectorImpl.java:65)
> ~[storm-client-2.5.0.jar:2.5.0]
> at org.apache.storm.task.OutputCollector.emit(OutputCollector.java:93)
> ~[storm-client-2.5.0.jar:2.5.0]
> at org.apache.storm.task.OutputCollector.emit(OutputCollector.java:93)
> ~[storm-client-2.5.0.jar:2.5.0]
> at org.apache.storm.task.OutputCollector.emit(OutputCollector.java:42)
> ~[storm-client-2.5.0.jar:2.5.0]
> at
> org.apache.storm.topology.WindowedBoltExecutor.execute(WindowedBoltExecutor.java:313)
> ~[storm-client-2.5.0.jar:2.5.0]
> at
> org.apache.storm.executor.bolt.BoltExecutor.tupleActionFn(BoltExecutor.java:212)
> ~[storm-client-2.5.0.jar:2.5.0]
> at org.apache.storm.executor.Executor.accept(Executor.java:294)
> ~[storm-client-2.5.0.jar:2.5.0]
> ... 6 more`
> ```
>
> I have defined my topology as below:
>
> ```
> public class TestTopology {
> public static void main (String[] args) throws Exception {
> Config config = new Config();
> config.put(Config.TOPOLOGY_TESTING_ALWAYS_TRY_SERIALIZE, true);
> config.registerSerialization(TupleImpl.class);
> config.registerSerialization(Fields.class);
>
> LocalCluster cluster = new LocalCluster();
> try (LocalCluster.LocalTopology topology =
> cluster.submitTopology("testTopology", config,
> getTopology().createTopology())) {
> Thread.sleep(50000);}
> cluster.shutdown();
> }
> static TopologyBuilder getTopology(){
> TopologyBuilder builder = new TopologyBuilder();
> builder.setSpout("eventSpout", new LateEventSpout());
> builder.setBolt("windowBolt", new
> WindowBolt().withTumblingWindow(BaseWindowedBolt.Duration.seconds(10)).
> withTimestampField("time").
> withLateTupleStream("lateEvents")).
> shuffleGrouping("eventSpout");
> builder.setBolt("latePrintBolt", new LatePrintBolt()).
> shuffleGrouping("windowBolt", "lateEvents");
> builder.setBolt("printBolt", new
> PrintBolt()).shuffleGrouping("windowBolt");
> return builder;
> }
> }
> ```
> Where `LateEventSpout` is
>
> ```
> public class LateEventSpout extends BaseRichSpout {
> private SpoutOutputCollector collector;
> private List<Long> eventTimes;
> private int currentTime = 0;
> private int id = 1;
> public LateEventSpout () {
> eventTimes = new ArrayList<>();
> for (int i = 1; i<= 61; i++) {
> eventTimes.add(Instant.EPOCH.plusSeconds(i).toEpochMilli());
> } // [epoch+1, epoch+2, .., epoch+61]
> }
> @Override
> public void open(Map<String, Object> conf, TopologyContext context,
> SpoutOutputCollector collector) {
> this.collector = collector;
> }
> @Override
> public void nextTuple() {
> int eventId = id++;
> Long eventTime = eventTimes.get(currentTime++);
> if (currentTime == eventTimes.size()){
> currentTime = 0; // reset time to zero so we have OOO
> events
> }
> collector.emit(new Values(eventId, eventTime));
> }
> @Override
> public void declareOutputFields(OutputFieldsDeclarer declarer) {
> declarer.declare(new Fields("id", "time"));
> }
> }
> ```
> And `WindowBolt` is:
>
> ```
> public class WindowBolt extends BaseWindowedBolt {
> OutputCollector collector;
> @Override
> public void prepare(Map<String, Object> topoConf, TopologyContext
> context, OutputCollector collector){
> this.collector = collector;
> }
> @Override
> public void execute(TupleWindow inputWindow) {
> int sum = 0;
> for (Tuple event : inputWindow.get()){
> sum++;
> }
> collector.emit(new Values(inputWindow.getStartTimestamp(),
> inputWindow.getEndTimestamp(), sum));
> }
> @Override
> public void declareOutputFields(OutputFieldsDeclarer declarer) {
> declarer.declare(new Fields("start", "end", "sum"));
> }
> }
> ```
> And `PrintBolt` just prints the `windowBolt` output. (`LatePrintBolt` is
> similar)
>
> ```
> public class PrintBolt extends BaseRichBolt {
> @Override
> public void prepare(Map<String, Object> topoConf, TopologyContext
> context, OutputCollector collector) {
> }
> @Override
> public void execute(Tuple input) {
> System.out.println(String.format("Start: %d, End: %d, Sum:%d",
> input.getLongByField("start"), input.getLongByField("end"),
> input.getIntegerByField("sum")));
> }
> @Override
> public void declareOutputFields(OutputFieldsDeclarer declarer) {
> }
> }
> ```
> If I don't set the `LatePrintBolt` in `TopologyBuilder`, I get the correct
> results.
>
> ```
> Start: 0, End: 10000, Sum:10
> Start: 10000, End: 20000, Sum:10
> Start: 20000, End: 30000, Sum:10
> Start: 30000, End: 40000, Sum:10
> Start: 40000, End: 50000, Sum:10
> Start: 50000, End: 60000, Sum:10
> ```
> However, when I try to print lateEvents stream, I get the same output but
> on the first late event, I get the above-mentioned exception.
>
> I have debugged the issue. When [WindowedBoltExecutor](
> https://github.com/apache/storm/blob/18341682ce90976c173ecf9ac68582b1626bda8a/storm-client/src/jvm/org/apache/storm/topology/WindowedBoltExecutor.java#L313)
> receives a late tuple, it emits the late tuple but
> [BoltOutputCollectorImpl](
> https://github.com/apache/storm/blob/18341682ce90976c173ecf9ac68582b1626bda8a/storm-client/src/jvm/org/apache/storm/executor/bolt/BoltOutputCollectorImpl.java#L110)
> rewraps it in a new Tuple. Now, this new tuple contains
> `WorkerTopologyContext` which is not serializable, hence, the error.
>
> I would like to know how I can process the late tuples.
>
> Regards,
> Jawad Tahir.
>
