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Posted to dev@kafka.apache.org by "John Hofman (JIRA)" <ji...@apache.org> on 2016/06/28 09:54:57 UTC
[jira] [Updated] (KAFKA-3910) Cyclic schema support in
ConnectSchema and SchemaBuilder
[ https://issues.apache.org/jira/browse/KAFKA-3910?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
John Hofman updated KAFKA-3910:
-------------------------------
Description:
Cyclic schema's are not supported by ConnectSchema or SchemaBuilder. Subsequently the AvroConverter (confluentinc/schema-registry) hits a stack overflow when converting a cyclic avro schema, e.g:
{code}
{"type":"record", "name":"list","fields":[{"name":"value","type":"int"},{"name":"next","type":["null","list"]}]}
{code}
This is a blocking issue for all connectors running on the connect framework with data containing cyclic references. The AvroConverter cannot support cyclic schema's until the underlying ConnectSchema and SchemaBuilder do.
To reproduce the stack-overflow (Confluent-3.0.0):
Produce some cyclic data:
{code}
bin/kafka-avro-console-producer --broker-list localhost:9092 --topic test --property value.schema='{"type":"record", "name":"list","fields":[{"name":"value","type":"int"},{"name":"next","type":["null","list"]}]}'
{"value":1,"next":null}
{"value":1,"next":{"list":{"value":2,"next":null}}}
{code}
Then try to consume it with connect:
{code:title=connect-console-sink.properties}
name=local-console-sink
connector.class=org.apache.kafka.connect.file.FileStreamSinkConnector
tasks.max=1
topics=test
{code}
{code}
./bin/connect-standalone ./etc/schema-registry/connect-avro-standalone.properties connect-console-sink.properties
… start up logging …
java.lang.StackOverflowError
at org.apache.avro.JsonProperties.getJsonProp(JsonProperties.java:54)
at org.apache.avro.JsonProperties.getProp(JsonProperties.java:45)
at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1055)
at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1103)
at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1137)
at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1103)
at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1137)
{code}
was:
Cyclic schema's are not supported by ConnectSchema or SchemaBuilder. Subsequently the AvroConverter (confluentinc/schema-registry) hits a stack overflow when converting a cyclic avro schema, e.g:
{code}
{"type":"record", "name":"list","fields":[{"name":"value","type":"int"},{"name":"next","type":["null","list"]}]}
{code}
This is a blocking issue for all connectors running on the connect framework and with data containing cyclic references. The AvroConverter cannot support cyclic schema's until the underlying ConnectSchema and SchemaBuilder do.
To reproduce the stack-overflow (Confluent-3.0.0):
Produce some cyclic data:
{code}
bin/kafka-avro-console-producer --broker-list localhost:9092 --topic test --property value.schema='{"type":"record", "name":"list","fields":[{"name":"value","type":"int"},{"name":"next","type":["null","list"]}]}'
{"value":1,"next":null}
{"value":1,"next":{"list":{"value":2,"next":null}}}
{code}
Then try to consume it with connect:
{code:title=connect-console-sink.properties}
name=local-console-sink
connector.class=org.apache.kafka.connect.file.FileStreamSinkConnector
tasks.max=1
topics=test
{code}
{code}
./bin/connect-standalone ./etc/schema-registry/connect-avro-standalone.properties connect-console-sink.properties
… start up logging …
java.lang.StackOverflowError
at org.apache.avro.JsonProperties.getJsonProp(JsonProperties.java:54)
at org.apache.avro.JsonProperties.getProp(JsonProperties.java:45)
at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1055)
at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1103)
at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1137)
at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1103)
at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1137)
{code}
> Cyclic schema support in ConnectSchema and SchemaBuilder
> --------------------------------------------------------
>
> Key: KAFKA-3910
> URL: https://issues.apache.org/jira/browse/KAFKA-3910
> Project: Kafka
> Issue Type: Improvement
> Components: KafkaConnect
> Affects Versions: 0.10.0.0
> Reporter: John Hofman
> Assignee: Ewen Cheslack-Postava
> Priority: Blocker
>
> Cyclic schema's are not supported by ConnectSchema or SchemaBuilder. Subsequently the AvroConverter (confluentinc/schema-registry) hits a stack overflow when converting a cyclic avro schema, e.g:
> {code}
> {"type":"record", "name":"list","fields":[{"name":"value","type":"int"},{"name":"next","type":["null","list"]}]}
> {code}
> This is a blocking issue for all connectors running on the connect framework with data containing cyclic references. The AvroConverter cannot support cyclic schema's until the underlying ConnectSchema and SchemaBuilder do.
> To reproduce the stack-overflow (Confluent-3.0.0):
> Produce some cyclic data:
> {code}
> bin/kafka-avro-console-producer --broker-list localhost:9092 --topic test --property value.schema='{"type":"record", "name":"list","fields":[{"name":"value","type":"int"},{"name":"next","type":["null","list"]}]}'
> {"value":1,"next":null}
> {"value":1,"next":{"list":{"value":2,"next":null}}}
> {code}
> Then try to consume it with connect:
> {code:title=connect-console-sink.properties}
> name=local-console-sink
> connector.class=org.apache.kafka.connect.file.FileStreamSinkConnector
> tasks.max=1
> topics=test
> {code}
> {code}
> ./bin/connect-standalone ./etc/schema-registry/connect-avro-standalone.properties connect-console-sink.properties
> … start up logging …
> java.lang.StackOverflowError
> at org.apache.avro.JsonProperties.getJsonProp(JsonProperties.java:54)
> at org.apache.avro.JsonProperties.getProp(JsonProperties.java:45)
> at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1055)
> at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1103)
> at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1137)
> at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1103)
> at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1137)
> {code}
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