Github user HeartSaVioR commented on the issue: https://github.com/apache/storm/pull/1751 @vesense I got an exception while executing topology: ``` 21:12:44.247 [main] INFO o.a.s.s.r.DataSourcesRegistry - Registering scheme kafka with org.apache.storm.sql.kafka.KafkaDataSourcesProvider@338c99c8 Exception in thread "main" java.lang.IllegalStateException: Bolt 'b-0-LOGICALFILTER_6-LOGICALPROJECT_7' contains a non-serializable field of type org.apache.avro.Schema$RecordSchema, which was instantiated prior to topology creation. org.apache.avro.Schema$RecordSchema should be instantiated within the prepare method of 'b-0-LOGICALFILTER_6-LOGICALPROJECT_7 at the earliest. at org.apache.storm.topology.TopologyBuilder.createTopology(TopologyBuilder.java:127) at org.apache.storm.trident.topology.TridentTopologyBuilder.buildTopology(TridentTopologyBuilder.java:265) at org.apache.storm.trident.TridentTopology.build(TridentTopology.java:529) at org.apache.storm.sql.StormSqlImpl.submit(StormSqlImpl.java:134) at org.apache.storm.sql.StormSqlRunner.main(StormSqlRunner.java:63) Caused by: java.lang.RuntimeException: java.io.NotSerializableException: org.apache.avro.Schema$RecordSchema at org.apache.storm.utils.Utils.javaSerialize(Utils.java:235) at org.apache.storm.topology.TopologyBuilder.createTopology(TopologyBuilder.java:122) ... 4 more Caused by: java.io.NotSerializableException: org.apache.avro.Schema$RecordSchema at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509) ... ``` Maybe `schema` shouldn't be parsed from constructor. (We could use it for verification but shouldn't store it.) Instead, you can initialize for the first time of write() or deserialize(), and reuse it after calling. Please let me know if your patch works well with SQL runner with remote cluster.
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. ---