I take Apache Storm calmly and try with the trident topology for Kafka ie TransactionalTridentKafkaSpout . Everything works fine except for the Storm interface. Despite the fact that I did not present any data in my topic, the Storm user interface continues to display invalid emitted / transmitted values. The counter value continues to increase, even if there is no data in this topic. I tried to delete data / logs stored in zookeeper, storm, kafka and recreate kafka themes as well as install
topology.stats.sample.rate: 1.0
but the problem remains.
And also I came across a tool called Capillary for monitoring a storm cluster. I use the following properties
capillary.zookeepers="192.168.125.20:2181"
capillary.kafka.zkroot="192.168.125.20:/home/storm/kafka_2.11-0.8.2.0"
capillary.storm.zkroot="192.168.125.20:/home/storm/apache-storm-0.9.3"
I am using Kafka's built-in zookeeper. Even this does not work, getting the exception below.
! @6mbg4bp7l - Internal server error, for (GET) [/] ->
play.api.Application$$anon$1: Execution exception[[JsonParseException: Unexpected character ('.' (code 46)): Expected space separating root-level values
at [Source: java.io.StringReader@24adb083; line: 1, column: 9]]]
at play.api.Application$class.handleError(Application.scala:296) ~[com.typesafe.play.play_2.10-2.3.4.jar:2.3.4]
at play.api.DefaultApplication.handleError(Application.scala:402) [com.typesafe.play.play_2.10-2.3.4.jar:2.3.4]
at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$14$$anonfun$apply$1.applyOrElse(PlayDefaultUpstreamHandler.scala:205) [com.typesafe.play.play_2.10-2.3.4.jar:2.3.4]
at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$14$$anonfun$apply$1.applyOrElse(PlayDefaultUpstreamHandler.scala:202) [com.typesafe.play.play_2.10-2.3.4.jar:2.3.4]
at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:33) [org.scala-lang.scala-library-2.10.4.jar:na]
Caused by: com.fasterxml.jackson.core.JsonParseException: Unexpected character ('.' (code 46)): Expected space separating root-level values
at [Source: java.io.StringReader@24adb083; line: 1, column: 9]
at com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:1524) ~[com.fasterxml.jackson.core.jackson-core-2.3.2.jar:2.3.2]
at com.fasterxml.jackson.core.base.ParserMinimalBase._reportError(ParserMinimalBase.java:557) ~[com.fasterxml.jackson.core.jackson-core-2.3.2.jar:2.3.2]
at com.fasterxml.jackson.core.base.ParserMinimalBase._reportUnexpectedChar(ParserMinimalBase.java:475) ~[com.fasterxml.jackson.core.jackson-core-2.3.2.jar:2.3.2]
at com.fasterxml.jackson.core.base.ParserMinimalBase._reportMissingRootWS(ParserMinimalBase.java:495) ~[com.fasterxml.jackson.core.jackson-core-2.3.2.jar:2.3.2]
at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._verifyRootSpace(ReaderBasedJsonParser.java:1178) ~[com.fasterxml.jackson.core.jackson-core-2.3.2.jar:2.3.2]
Any help on any of them would be great. Thanks in advance.
Configuration and source code snippet:
final Config config = new Config();
config.put(Config.TOPOLOGY_TRIDENT_BATCH_EMIT_INTERVAL_MILLIS, 3000);
config.setNumWorkers(2);
config.put(Config.NIMBUS_HOST, "192.168.125.20");
config.put(Config.NIMBUS_THRIFT_PORT, 6627);
config.put(Config.STORM_ZOOKEEPER_PORT, 2181);
config.put(Config.STORM_ZOOKEEPER_SERVERS, Arrays.asList("192.168.125.20"));
config.put(Config.TOPOLOGY_EXECUTOR_RECEIVE_BUFFER_SIZE, 16384);
config.put(Config.TOPOLOGY_ACKER_EXECUTORS, 1);
config.put(Config.TOPOLOGY_MAX_SPOUT_PENDING, 10);
config.put(Config.DRPC_SERVERS, Arrays.asList("192.168.125.20"));
config.put(Config.DRPC_PORT, 3772);
final BrokerHosts zkHosts = new ZkHosts("192.168.125.20");
final TridentKafkaConfig kafkaConfig = new TridentKafkaConfig(zkHosts, "Test_Topic", "");
kafkaConfig.scheme = new SchemeAsMultiScheme(new StringScheme());
kafkaConfig.bufferSizeBytes = 1024 * 1024 * 4;
kafkaConfig.fetchSizeBytes = 1024 * 1024 * 4;
kafkaConfig.forceFromStart = false;
final TransactionalTridentKafkaSpout kafkaSpout = new TransactionalTridentKafkaSpout(kafkaConfig);
final TridentTopology topology = new TridentTopology();
topology.newStream("spout", kafkaSpout)
.each(new Fields("str"), new TestFunction(), new Fields("test"))
.each(new Fields("str"), new PrintFilter());
Topology Short Image:
