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The following methods in ExecutionConfig
will be deprecated
and be removed in flink-2.0
Method | Annotation |
org.apache.flink.api.common.ExecutionConfig#registerKryoType(Class<?> type) | @Public |
org.apache.flink.api.common.ExecutionConfig#registerPojoType(Class<?> type) | |
org.apache.flink.api.common.ExecutionConfig#registerTypeWithKryoSerializer(Class<?> type, Class<? extends Serializer> serializerClass) | |
org.apache.flink.api.common.ExecutionConfig#registerTypeWithKryoSerializer(Class<?> type, T serializer) | |
org.apache.flink.api.common.ExecutionConfig#addDefaultKryoSerializer(Class<?> type, Class<? extends Serializer<?>> serializerClass) | |
org.apache.flink.api.common.ExecutionConfig#addDefaultKryoSerializer( Class<?> type, T serializer) | |
org.apache.flink.api.common.ExecutionConfig#getRegisteredKryoTypes() | |
org.apache.flink.api.common.ExecutionConfig#getRegisteredPojoTypes() | |
org.apache.flink.api.common.ExecutionConfig#getRegisteredTypesWithKryoSerializerClasses() | |
org.apache.flink.api.common.ExecutionConfig#getRegisteredTypesWithKryoSerializers() | |
org.apache.flink.api.common.ExecutionConfig#getDefaultKryoSerializerClasses() | |
org.apache.flink.api.common.ExecutionConfig#getDefaultKryoSerializers() | |
org.apache.flink.api.common.ExecutionConfig#enableForceAvro() | |
org.apache.flink.api.common.ExecutionConfig#enableForceKryo() | |
org.apache.flink.api.common.ExecutionConfig#enableGenericTypes() | |
org.apache.flink.api.common. | ExecutionConfig#setForceAvro(boolean forceAvro)|
org.apache.flink.api.common.ExecutionConfig#setForceKryo(boolean forceKryo) | |
ExecutionConfig#disableForceAvro() | |
org.apache.flink.api.common.ExecutionConfig#disableForceKryo() | |
org.apache.flink.api.common.ExecutionConfig#disableGenericTypes() | |
org.apache.flink.api.common.ExecutionConfig#hasGenericTypesDisabled() | |
org.apache.flink.api.common.ExecutionConfig#isForceAvroEnabled() | |
org.apache.flink.api.common.ExecutionConfig#isForceKryoEnabled() |
The following methods in StreamExecutionEnvironment
will be deprecated and removed in flink-21.020
Method | Annotation |
org.apache.flink.streaming.api.environment.StreamExecutionEnvironment#registerType(Class<?> type) | @Public |
org.apache.flink.streaming.api.environment.StreamExecutionEnvironment#registerTypeWithKryoSerializer(Class<?> type, Class<? extends Serializer> serializerClass) | |
org.apache.flink.streaming.api.environment.StreamExecutionEnvironment#registerTypeWithKryoSerializer(Class<?> type, T serializer) | |
org.apache.flink.streaming.api.environment.StreamExecutionEnvironment#addDefaultKryoSerializer(Class<?> type, Class<? extends Serializer<?>> serializerClass) | |
org.apache.flink.streaming.api.environment.StreamExecutionEnvironment#addDefaultKryoSerializer(Class<?> type, T serializer) |
The following method in TypeInformation
and it's sub-classes will be deprecated and removed in flink-2next release.0
Method | Annotation |
org.apache.flink.api.common.typeinfo#createSerializer(ExecutionConfig config) | @PublicEvolving |
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Code Block |
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@PublicEvolving public class PipelineOptions { /** This options will be removed in flink-2.0, use `pipeline.serialization-config` instead. */ @Deprecated public static final ConfigOption<List<String>> KRYO_DEFAULT_SERIALIZERS = key("pipeline.default-kryo-serializers") .stringType() .asList() .noDefaultValue() .withDescription( Description.builder() .text( "Semicolon separated list of pairs of class names and Kryo serializers class names to be used" + " as Kryo default serializers") .linebreak() .linebreak() .text("Example:") .linebreak() .add( TextElement.code( "class:org.example.ExampleClass,serializer:org.example.ExampleSerializer1;" + " class:org.example.ExampleClass2,serializer:org.example.ExampleSerializer2")) .build()); /** This options will be removed in flink-2.0, use `pipeline.serialization-config` instead. */ @Deprecated public static final ConfigOption<List<String>> KRYO_REGISTERED_CLASSES = key("pipeline.registered-kryo-types") .stringType() .asList() .noDefaultValue() .withDescription( Description.builder() .text( "Semicolon separated list of types to be registered with the serialization stack. If the type" + " is eventually serialized as a POJO, then the type is registered with the POJO serializer. If the" + " type ends up being serialized with Kryo, then it will be registered at Kryo to make" + " sure that only tags are written.") .build()); /** This options will be removed in flink-2.0, use `pipeline.serialization-config` instead. */ @Deprecated public static final ConfigOption<List<String>> POJO_REGISTERED_CLASSES = key("pipeline.registered-pojo-types") .stringType() .asList() .noDefaultValue() .withDescription( Description.builder() .text( "Semicolon separated list of types to be registered with the serialization stack. If the type" + " is eventually serialized as a POJO, then the type is registered with the POJO serializer. If the" + " type ends up being serialized with Kryo, then it will be registered at Kryo to make" + " sure that only tags are written.") .build()); public static final ConfigOption<List<String>> SERIALIZATION_CONFIG = key("pipeline.serialization-config") .stringType() .asList() .noDefaultValue() .withDescription( Description.builder() .text( "Semicolon separatedList list of pairs of class names and serializer config to be used. There is `type` fiend in" + " the serializer config with a value 'pojo', 'kryo' or 'typeinfo' and each `type` has its own" + " configuration.") .linebreak() .linebreak() .text("Example:") .linebreak() .add( TextElement.code( "[org.example.ExampleClass1: {type: pojo};," + " org.example.ExampleClass2: {type: kryo};," + " org.example.ExampleClass3: {type: kryo, kryo-type: default, class: org.example.Class3KryoSerializer};," + " org.example.ExampleClass4: {type: kryo, kryo-type: registered, class: org.example.Class4KryoSerializer};," + " org.example.ExampleClass5: {type: typeinfo, class: org.example.Class5TypeInfoFactory}]")) .build()); } |
The value for pipeline.serialization-config
is a key-value pair, there will be data class name for the key and the serializers of the data for the value. The configuration for serialization is as follows.
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Code Block |
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/** * A config to define the behavior for serializer in flink job, it manages the registered type and serializers. * The config is created from job configuration and used by flink to create serializer for data type. **/ @PublicEvolving public final class SerializerConfig implements Serializable { /** Create serializer config instance from configuration. */ public SerializerConfig(Configuration configuration) { ...; } /** Returns the registered types with their Kryo Serializer classes. */ public LinkedHashMap<Class<?>, Class<? extends Serializer<?>>> getRegisteredTypesWithKryoSerializerClasses(); /** Returns the registered Kryo Serializer classes. */ public LinkedHashMap<Class<?>, Class<? extends Serializer<?>>> getDefaultKryoSerializerClasses(); /** Returns the registered Kryo types. */ public LinkedHashSet<Class<?>> getKryoTypesgetRegisteredKryoTypes(); /** Returns the registered POJO types. */ public LinkedHashSet<Class<?>> getPojoTypesgetRegisteredPojoTypes(); /** Returns the registered type info factories. */ public LinkedHashMap<Class<Map<Class<?>, Class<TypeInfoFactory<Class<? extends TypeInfoFactory<?>>> getTypeInfoFactoriesgetRegisteredTypeInfoFactories(); /** * Checks whether generic types are supported. Generic types are types that go through Kryo * during serialization. * * <p>Generic types are enabled by default. * * @see #enableGenericTypes() * @see #disableGenericTypes() */ public boolean hasGenericTypesDisabled(); /** Returns whether the Apache Avro is the serializer for POJOs. */ public boolean isForceAvroEnabled(); /** Returns whether kryo is the serialzier for POJOs. */ public boolean isForceKryoEnabled(); } |
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Method | Annotation |
org.apache.flink.api.common.typeinfo#createSerializer(SerializerConfig config)@PublicEvolving |
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@PublicEvolving |
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Class | Annotation | org.apache.flink.api.common.ExecutionConfig.SerializableSerializer | @Public
Disable Kryo By Default
Currently, option pipeline.generic-types
in Flink is used to enable/disable Kryo
serialzier, its default value is true
which means Flink will use Kryo
as fallback serializer. This causes Kryo to be used by default to serialize some user-defined data without the user being aware of it, which can lead to incompatibility between the new and old versions of the job state during version upgrades. To avoid this issue, in Flink-2.0
, the default value of pipeline.generic-types
can be changed to false
to prevent the usage of the Kryo serializer without the user's knowledge.
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